Quick answer: The JST ZH 1.5 connector is a 1.5mm pitch, single-row, wire-to-board crimp connector with a housing lance locking system. It is rated 1.0A AC/DC at 50V, mates at a 5.9mm mounting height with 3.5mm depth using a top-entry through-hole header, and uses two different crimp terminals depending on wire size — SZH-003T-P0.5 for AWG #32–#28 and SZH-002T-P0.5 for AWG #28–#26. JST documents housings from ZHR-2 to ZHR-13. The KONNRA KR1501 series is documented as its cross-reference equivalent, and covers 2 to 16 circuits in both through-hole (DIP) and SMT mounting.
The JST ZH sits in the middle of JST's compact connector range — larger than the 1.0mm SH, smaller than the 2.0mm PH — which is exactly the pitch that micro servo motors, compact sensor modules, Raspberry Pi accessories, and small LiPo packs need. The housing lance design gives it a positive lock, and JST documents the ZH header as compatible with the ZR IDC connector, so the same board footprint can carry either a crimp or an insulation-displacement socket. That popularity has produced a documentation problem. The ZH terminal part numbers encode the wire size in a way that is easy to get backwards, and at least one widely-read supplier guide publishes them swapped — telling readers to use the fine-wire terminal on heavy wire and vice versa. Since using the wrong terminal for the wire gauge is the most common ZH assembly failure, that error matters. This guide is built the other way round: every JST figure below comes from JST's published ZH documentation, every KONNRA figure from KONNRA's product documentation, and every disagreement is stated rather than smoothed over.
A note on naming: this part appears as JST ZH 1.5 connector, JST ZH1.5, ZH 1.5mm, ZHR connector, "JST ZH 1.5mm", and "1.5mm JST connector" in listings and searches. They all refer to the same JST ZH series. This guide also cross-references the KONNRA KR1501 series, which KONNRA documents as the ZH 1.5 equivalent.
What this guide covers:
- Verified JST ZH 1.5 and KONNRA KR1501 specifications side by side
- Complete part number cross-reference — housings, headers, terminals
- The terminal mix-up that circulates online, and how to tell which is which
- The specification differences to check before you cross-reference
- Through-hole and SMT options, and when each is right
- Sourcing questions procurement teams ask (lead time, samples, qualification docs)
- How to get a cross-reference check on your specific part number
Key Specifications at a Glance
| Attribute | JST ZH 1.5 | KONNRA KR1501 |
|---|---|---|
| Pitch | 1.5mm | 1.5mm |
| Termination | Crimp (SZH-002T / SZH-003T) | Crimp |
| Mounting | Through-hole and SMT | Both DIP and SMT, straight and right-angle |
| Current rating | 1.0A AC/DC (AWG #26) | 1A |
| Voltage rating | 50V AC/DC | 100V (see the note below) |
| Circuits | ZHR-2 – ZHR-13 in the JST housing table | 2 – 16 |
| Wire size | AWG #32 – #28 or #28 – #26, depending on terminal | See specification section |
| Insulation O.D. | 0.5 – 0.9mm (SZH-003T) or 0.8 – 1.1mm (SZH-002T) | 0.4 – 0.8mm |
| Mated height / depth | 5.9mm / 3.5mm (top-entry through-hole header) | 5.6mm / 3.5mm (top-mounted type, per KONNRA) |
| Lock | Housing lance system | Housing lance design |
| Operating temperature | −25°C to +85°C | −40°C to +105°C |
| Insulation resistance | 500MΩ min. | 100MΩ min. |
| Withstanding voltage | One-minute AC withstand test, no breakdown or flashover | 500V AC / minute |
| Housing material | PA, natural (white) | PBT / LCP / PA9T, UL94 |
| Header materials | Pin: brass, copper-undercoated, tin-plated. Wafer: PA (glass-filled), natural ivory | Phosphor bronze contacts |
| Plating | Tin-plated | Gold flash / tin over nickel |
| Standards | RoHS compliant | UL certification; RoHS compliant |
Both columns are compiled from manufacturer documentation, not distributor listings. Sources are listed at the end of this guide.
What Is the JST ZH 1.5 Connector?
The JST ZH is a 1.5mm pitch, single-row, wire-to-board crimp connector. A wire is crimped into a terminal, the terminal clicks into a housing, and the housing latches onto a header on the PCB. A complete connection uses three parts:
- ZHR housing — the wire-side plug
- B-ZR or S-ZR header — the PCB-side header, top entry or side entry, through-hole or SMT
- SZH terminal — the crimp contact, selected by wire size
Key characteristics:
- 1.5mm pitch — between the JST SH (1.0mm) and JST PH (2.0mm)
- Housing lance system — the locking lance is on the housing, giving a positive click and reliable retention
- Fully shrouded header — JST documents the header as fully shrouded to ensure durability
- Both through-hole and SMT headers — through-hole top entry and side entry, plus SMT versions with boss or reinforcement
- Two terminals, two wire ranges — the ZH terminal is not a single part covering all wire sizes
- ZR IDC socket compatible — JST documents the ZH header as accepting the ZR insulation-displacement connector
- 1.0A per contact at 50V AC/DC — rated with AWG #26 wire
- Low profile — 5.9mm mated height and 3.5mm depth with the top-entry through-hole header
- RoHS compliant and supplied on embossed tape and reel
Figure 1 — KONNRA KR1501 series: 1.5mm pitch ZH wire-to-board connector
➡️ View the KONNRA KR1501 ZH 1.5mm Connector
JST ZH 1.5 = KONNRA KR1501: Part Number Cross-Reference
| JST ZH component | JST part number | KONNRA equivalent |
|---|---|---|
| Wire housing, 2–13 circuits | ZHR-2 … ZHR-13 | KR1501 Housing (2–16 circuits) |
| Through-hole header, top entry | B2B-ZR … B13B-ZR (also B…B-ZR-3.4, 3.4mm soldering length) | KR1501 DIP straight 180° wafer |
| Through-hole header, side entry | S2B-ZR … S13B-ZR (also S…B-ZR-3.4) | KR1501 DIP right-angle 90° wafer |
| SMT header, side entry with boss | S2B-ZR-SM2-TF … S13B-ZR-SM2-TF | KR1501 SMT right-angle 90° wafer |
| SMT header with reinforcement, top entry | B2B-ZR-SM4-TF … B13B-ZR-SM4-TF | KR1501 SMT straight 180° wafer |
| SMT header with reinforcement, side entry | S2B-ZR-SM4A-TF … S13B-ZR-SM4A-TF | KR1501 SMT right-angle 90° wafer |
| Crimp terminal, fine wire | SZH-003T-P0.5 — AWG #32–#28 (0.032–0.08mm²), insulation 0.5–0.9mm | KR1501 Terminal |
| Crimp terminal, heavier wire | SZH-002T-P0.5 — AWG #28–#26 (0.08–0.13mm²), insulation 0.8–1.1mm | KR1501 Terminal |
| Compatible IDC socket on the same header | ZR IDC connector | — |
Reading the part numbers. The circuit count is embedded in the position digits: ZHR-4 is the 4-circuit housing, B4B-ZR is the 4-circuit top-entry through-hole header, S4B-ZR is the 4-circuit side-entry header. The -SM2- and -SM4- markers indicate SMT headers — SM2 is the side-entry type with boss, SM4 the reinforced type available in top entry and side entry. Through-hole headers also come in a -3.4 variant with 3.4mm soldering length for thicker boards.
The terminal mix-up: which SZH part goes with which wire
This is the single most common error in JST ZH documentation, and it is worth getting right before anything else.
| Terminal | Wire range | Insulation O.D. | Use it for |
|---|---|---|---|
| SZH-003T-P0.5 | AWG #32 to #28 (0.032 to 0.08mm²) | 0.5 to 0.9mm | Fine wire — micro servo leads, thin sensor harnesses |
| SZH-002T-P0.5 | AWG #28 to #26 (0.08 to 0.13mm²) | 0.8 to 1.1mm | Heavier wire — power leads, higher-current runs |
Note the counter-intuitive ordering: the higher-numbered terminal (003T) is the fine-wire part, and the lower-numbered terminal (002T) is the heavier-wire part. Several third-party guides state this the other way round, advising SZH-002T for AWG 32–28 and SZH-003T for AWG 30–26. According to JST's own ZH documentation, that is reversed. Why it matters. JST rates SZH-002T-P0.5 at 0.7A AC/DC when used with AWG #28 wire — below the connector's 1.0A series rating. If you specify the wrong terminal for your wire, you get a crimp that either will not close properly around the conductor or does not grip it, and on fine wire that shows up as an intermittent connection rather than a line reject. Match the terminal to the wire first, then check the current rating at that wire size. One part number, two termination methods. JST documents the ZH header as compatible with the ZR IDC connector, so the same PCB footprint can be built with crimp termination (ZH) or insulation displacement termination (ZR). KONNRA does not document a ZR-type IDC socket for the KR1501, so if your programme depends on that interchangeability, confirm it before switching.
Both families offer through-hole and SMT. Unlike the 1.0mm SH and 1.25mm GH families, the ZH is available in both mounting types — which is one reason it is so widely designed in.
JST ZH 1.5 / KONNRA KR1501 Specifications
| Parameter | JST ZH 1.5 (JST documentation) | KONNRA KR1501 (KONNRA documentation) |
|---|---|---|
| Pitch | 1.5mm | 1.5mm |
| Row configuration | Single row | Single row |
| Connection type | Wire-to-Board | Wire-to-Board |
| Termination | Crimp (SZH-002T-P0.5 / SZH-003T-P0.5) | Crimp |
| Current rating | 1.0A AC/DC (AWG #26) | 1A |
| Voltage rating | 50V AC/DC | 100V |
| Circuits | ZHR-2 – ZHR-13 in the housing table reviewed | 2 – 16 |
| Conductor size | AWG #32–#28 (0.032–0.08mm²) or AWG #28–#26 (0.08–0.13mm²), by terminal | — |
| Insulation O.D. | 0.5–0.9mm (SZH-003T) or 0.8–1.1mm (SZH-002T) | 0.4 – 0.8mm |
| Contact resistance | JST publishes separate initial and after-environmental-test maximums | 20mΩ max |
| Insulation resistance | 500MΩ min. | 100MΩ min. |
| Withstanding voltage | One-minute AC withstand test; no breakdown or flashover | 500V AC / minute |
| Operating temperature | −25°C to +85°C | −40°C to +105°C |
| Mated height (top entry, THT) | 5.9mm | 5.6mm (top-mounted type, per KONNRA) |
| Mated depth | 3.5mm | 3.5mm |
| Housing material | PA, natural (white) | PBT / LCP / PA9T, UL94 |
| Header material | Pin: brass, copper-undercoated, tin-plated. Wafer: PA glass-filled, natural ivory | Phosphor bronze contacts |
| Plating | Tin-plated | Gold flash / Tin over Nickel |
| Mounting | Through-hole (top/side entry) and SMT (boss or reinforcement type) | DIP 90° / DIP 180° and SMT 90° / SMT 180° |
| Lock | Housing lance system | Housing lance design |
| Packaging | Embossed tape and reel (SMT); top entry available with suction tape | Tape and reel (see package specification) |
| Standards | RoHS compliant | UL certification; RoHS compliant |
" — " indicates the parameter is not stated in the manufacturer documentation reviewed for this guide. Confirm any blank against the current JST ZH datasheet before releasing a drawing.
Specification differences worth verifying before you cross-reference
Six points deserve attention before you sign off a cross-reference.
- Insulation resistance is lower on the KR1501 — 100MΩ versus JST's 500MΩ. This is the one parameter where the JST part is documented to a tighter figure. JST's ZH datasheet states 500MΩ minimum, and KONNRA documents the KR1501 at 100MΩ minimum. If your specification or your customer's requires a minimum insulation resistance above 100MΩ, raise it with KONNRA engineering before you qualify the part rather than after.
- Insulation diameter range is narrower. JST's two ZH terminals accept 0.5–0.9mm (fine wire) or 0.8–1.1mm (heavier wire). KONNRA documents the KR1501 at 0.4–0.8mm. Note this is a narrower window at the top end — wire with insulation thicker than 0.8mm may not be accepted. For heavier wire, confirm the accepted range against the KR1501 product specification.
- The voltage rating differs — 100V on the KR1501 versus 50V on the JST ZH. Once again, this is a KR1501 figure that is higher than the JST series rating. A higher claim needs backing: if your application actually relies on the 100V rating, ask for the dielectric withstand test data rather than taking the number at face value.
- Mated height differs by 0.3mm — 5.6mm versus 5.9mm. KONNRA documents the KR1501 at a 5.6mm package height for the top-mounted type, against JST's documented 5.9mm mounting height with the top-entry through-hole header. Small, but it affects enclosure clearance, so verify against the drawing for your specific wafer.
- Contact resistance — compare like with like. JST publishes separate maximums for the initial value and the after-environmental-test condition. Third-party tables typically quote one number without saying which. KONNRA documents the KR1501 at 20mΩ max. If contact resistance is critical, request the test data from both sources rather than comparing a single figure.
- The dual-row and high-circuit-count question. JST's ZH housing table as reviewed runs to 13 circuits; the KONNRA KR1501 is documented to 16. If you need 14 or more positions at 1.5mm pitch, check availability rather than assuming the series stops at 13.
JST ZH / KR1501 Component and Configuration Options
The KR1501 is specified as six separately orderable components, each with its own product drawing — which is what lets the same series serve both through-hole and SMT assemblies.
DIP straight wafer (180° / top entry, through-hole)
1.5mm pitch through-hole header, single row 2–16 circuits, 100V, 1A. The through-hole equivalent of JST's top-entry B…B-ZR header.
Figure 2 — KR1501 DIP straight (180°) wafer, through-hole top entry
SMT straight wafer (180° / top entry, surface mount)
1.5mm pitch SMT header, single row 2–16 circuits, 100V, 1A. The surface-mount route for the same footprint decision.
Figure 3 — KR1501 SMT straight (180°) wafer, surface-mount top entry
DIP right-angle wafer (90° / side entry, through-hole)
1.5mm pitch through-hole side-entry header, single row 2–16 circuits, 100V, 1A. Choose this when the cable leaves the board horizontally and you have depth rather than height available.
Figure 4 — KR1501 DIP right-angle (90°) wafer, through-hole side entry
➡️ KR1501 DIP Right Angle Wafer
SMT right-angle wafer (90° / side entry, surface mount)
1.5mm pitch SMT side-entry header, single row 2–16 circuits, 100V, 1A.
Figure 5 — KR1501 SMT right-angle (90°) wafer, surface-mount side entry
➡️ KR1501 SMT Right Angle Wafer
Housing
1.5mm pitch wire housing with locking lance, single row 2–16 circuits. Material is PBT / LCP / PA9T rated UL94.
Figure 6 — KR1501 1.5mm pitch wire housing with locking lance
Terminal
1.5mm pitch crimp contact, 100V, 1A max, contact resistance 20mΩ max, insulation resistance 100MΩ min, withstanding voltage 500V AC / minute, insulation O.D. 0.4–0.8mm, gold flash / tin over nickel plating. Before you specify this terminal, check which wire range you actually need. JST splits its ZH terminals into a fine-wire part and a heavier-wire part — see the terminal mix-up note above — and the KR1501 terminal is documented with a single insulation range of 0.4–0.8mm. If your harness uses wire at the ends of the range, confirm the accepted conductor and insulation dimensions in writing.
Figure 7 — KR1501 crimp terminal for 1.5mm pitch wire-to-board connections
Full series documentation
- KR1501 series engineering drawing (PDF)
- KR1501 product specification (PDF)
- KR1501 package specification (PDF)
➡️ Request drawings for your specific circuit count and mounting type
Through-Hole or SMT: How to Choose
The ZH is unusual among the compact JST families because it offers both mounting technologies, and the KR1501 matches that with six separate orderable components. The decision is usually mechanical rather than electrical.
| Through-hole (DIP) | Surface mount (SMT) | |
|---|---|---|
| KR1501 components | DIP straight 180°, DIP right-angle 90° | SMT straight 180°, SMT right-angle 90° |
| JST ZH equivalents | B…B-ZR (top), S…B-ZR (side), plus -3.4 3.4mm soldering length |
S…B-ZR-SM2-TF (boss, side), B…B-ZR-SM4-TF / S…B-ZR-SM4A-TF (reinforced) |
| Mechanical strength | Higher — the pins pass through the board and are soldered | Lower — retention is by solder joint only |
| Board real estate | Needs a hole pattern and clearance on the far side | Pads only; frees the far side for other routing |
| Assembly | Separate wave/selective solder operation | Placed and reflowed with the rest of the SMT line |
| Board thickness | -3.4 variants exist for thicker boards |
Not applicable |
| Best for | Cables that are plugged and unplugged, or pulled on | High-volume assembly where every insertion operation costs money |
The practical rule. Choose through-hole when the connector will see repeated mating cycles or cable pull — the pins carry the load. Choose SMT when assembly cost and board real estate matter more than mechanical retention, and the cable is likely to be routed and left in place. Check the far side of the board. A through-hole header needs clearance behind the PCB. In a stacked design, that clearance may not exist — which is the most common reason a ZH design ends up SMT despite a preference for through-hole. Note on the SMT types. JST splits its SMT ZH headers into a type with a boss (SM2) and a reinforced type (SM4). The boss version locates the header mechanically during placement; the reinforced version adds strength at the solder joints. KONNRA documents the KR1501 SMT wafers as straight 180° and right-angle 90°. If your design specifically relies on the boss or reinforcement geometry, confirm that detail against the KR1501 drawing rather than assuming it.
JST ZH 1.5 vs SH 1.0 vs GH 1.25 vs PH 2.0 vs XH 2.5
These five JST families cover almost every compact wire-to-board design, and they are constantly confused because they share a design language. They are not interchangeable at any level.
| Feature | JST SH 1.0 | JST GH 1.25 | JST ZH 1.5 | JST PH 2.0 | JST XH 2.5 |
|---|---|---|---|---|---|
| Pitch | 1.0mm | 1.25mm | 1.5mm | 2.0mm | 2.5mm |
| Current rating | 1A (AWG #28) | 1A (AWG #26) | 1A (AWG #26) | 2A (AWG #24) | 3A (AWG #22) |
| Voltage rating | 50V AC/DC | 50V AC/DC | 50V AC/DC | 100V AC/DC | 250V AC/DC |
| Operating temperature | −25 to +85°C | −25 to +85°C | −25 to +85°C | −40 to +105°C | −25 to +85°C |
| Wire size | AWG #32–#28 | AWG #30–#26 | AWG #32–#26 (by terminal) | AWG #32–#24 | AWG #30–#22 |
| Mounting | SMT only | SMT only | Through-hole and SMT | Through-hole and SMT | Through-hole (limited SMT) |
| Typical use | Micro FPV, wearables, compact IoT | Pixhawk / ArduPilot standard | Micro servos, compact sensors, Raspberry Pi accessories | LiPo batteries, Arduino-class sensors | 3D printers, RC receivers, power wiring |
| KONNRA equivalent | KR1000 | KR1259 | KR1501 | KR2004 / KR2001 | KR2501 |
All JST figures in this table are taken from JST's own series documentation for SH, GH, ZH, PH and XH. How to choose.
- 1A or less, and board height is the constraint → SH 1.0 / KR1000. Smallest of the five.
- 1A or less, and you need the Pixhawk ecosystem standard → GH 1.25 / KR1259.
- 1A, and you want a mechanically locked connector with a compact-but-handleable pitch → ZH 1.5 / KR1501. The middle ground, and the only one of the three compact families with a through-hole option.
- Up to 2A, common in hobby, battery and Arduino-class wiring → PH 2.0 / KR2004.
- Up to 3A with larger mechanical retention → XH 2.5 / KR2501.
Two things this table makes clear. First, voltage rating jumps sharply with pitch — 50V across the three compact families, then 100V for PH and 250V for XH. If your design runs above 50V, ZH is not the answer whatever the space constraint says. Second, only PH reaches 105°C, so the ZH's −40 to +105°C rating on the KR1501 is a genuine extension rather than something to take for granted across the family. A note on substitution. Because these families look alike, substitution errors are common and expensive — a 1.5mm housing will not mate with a 1.25mm header, and neither fits the other's footprint. Cross-reference on the specific part number, not on the pitch or the appearance.
Circuit Count Range and PCB Layout Considerations
JST's ZH housing table as reviewed covers ZHR-2 through ZHR-13. The KONNRA KR1501 is documented from 2 to 16 circuits. The table below gives the single-row contact-field width for common configurations, calculated from the 1.5mm pitch.
| Circuits | Pin-field width (calculated from 1.5mm pitch) |
|---|---|
| 2 | 1.5mm |
| 3 | 3.0mm |
| 4 | 4.5mm |
| 5 | 6.0mm |
| 6 | 7.5mm |
| 7 | 9.0mm |
| 8 | 10.5mm |
| 10 | 13.5mm |
| 12 | 16.5mm |
| 13 | 18.0mm |
| 16 | 22.5mm |
How to read this table. Width = (N − 1) × 1.5mm, where N is the circuit count. This is the distance across the contact field only — not the overall housing or header outline. It matches the "A" dimension in JST's own ZH housing table for the same circuit counts, which is a useful cross-check: JST lists ZHR-4 with an A dimension of 4.5mm and ZHR-10 with 13.5mm, both of which this formula reproduces. Overall dimensions, the pad or hole pattern, and stencil recommendations must come from the KR1501 drawings linked above. Board design notes:
- Confirm DIP or SMT, and straight 180° or right-angle 90°, before quoting. That is four possible footprints from one series.
- A through-hole header needs clearance on the far side of the board. Check it before designing around DIP.
- Verify mated height against the enclosure — 5.6mm (KONNRA) or 5.9mm (JST) for the top-entry configuration, plus the cable bend radius behind the housing.
- Tie the accepted wire insulation diameter to the connector drawing. The JST ZH terminals accept 0.5–0.9mm or 0.8–1.1mm depending on which terminal you select, and KONNRA documents the KR1501 at 0.4–0.8mm.
- Select the terminal before the housing. Wire size drives the terminal choice, and the terminal choice drives the accepted insulation diameter.
- Specify gold plating explicitly if you need it. Standard JST ZH is tin-plated; KONNRA documents gold flash / tin over nickel on the KR1501.
The KONNRA 1.5mm Pitch Connector Family
| Series | Cross-referenced to | Circuits | Current | Voltage | Rows | Category |
|---|---|---|---|---|---|---|
| KR1501 | JST ZH 1.5 | 2 – 16 | 1A | 100V | 1 | Wire-to-Board |
| KR1500 | Molex Pico SPOX MX1.5 | 2 – 15 | 2.5A | 250V | 1 | Wire-to-Board |
| KR1502 | JST SZN 1.5 | 2 – 16 | 1A | 200V | 1 | Board-In |
| KR1506 | GH 1.5mm | 2 – 6 | 1A | 50V | 1 | Wire-to-Board |
| KR1507 | Molex CLIK Mate MX1.5 (single row) | 2 – 15 | 3A | 100V | 1 | Wire-to-Board |
| KR1507 | Molex CLIK Mate MX1.5 (dual row) | 2×4 – 2×20 | 1.5A | 100V | 2 | Wire-to-Board |
| KR1511 | 1.50mm single row | 2 – 15 | 3A | 100V | 1 | Wire-to-Board |
Decision rule: compact 1A with a positive lock → KR1501. Need 2.5A at 1.5mm pitch → KR1500. Need 3A in the same pitch class → KR1507 single row or KR1511. Need a board-in mounting → KR1502. ➡️ Explore the full 1.5mm pitch range · Wire-to-board connector catalogue
Applications and Cable Assembly Options
| Application | Why the KR1501 fits |
|---|---|
| Micro servo motors | The 3-circuit 1.5mm connector is the standard for sub-micro and micro servos; 1A covers typical stall current |
| Compact sensor modules | 4- and 5-pin configurations, and the housing lance lock prevents vibration-induced disconnection |
| Raspberry Pi and single-board-computer accessories | Common for I²C, UART and battery connections on compact HATs and breakout boards |
| Portable and handheld electronics | Space-constrained designs where 1.0mm is too fine to assemble and 2.0mm is too large |
| Small LiPo battery packs | 2-circuit configurations at 1A |
| Home appliances | Control board to module wiring at low voltage |
| Industrial control and network equipment | Board-to-module signal wiring with a positive lock |
| Medical devices | Supported by KONNRA's ISO13485 medical device quality system |
Cable assembly options
KONNRA builds cable assemblies on the KR1501 system in the standard harness configurations:
| Cable type | Description | Typical use |
|---|---|---|
| Single-headed | Housing on one end, bare wire leads on the other | Pigtail to a header, panel wiring |
| Same-side-head | Housing on both ends, same orientation | Board-to-board extension, same-direction routing |
| Reverse-side-head | Housing on both ends, reversed orientation | Board-to-board extension, reversed routing |
| Adapter cables | KR1501 on one end, another series on the other (for example ZH-to-PH or ZH-to-DuPont) | Interfacing a 1.5mm device to a 2.0mm or 2.54mm board |
Cable assemblies are produced in KONNRA's wiring harness division, which accounts for 40% of company sales and operates its own injection moulding and assembly workshops. Adapter and transition cables are a common requirement in the ZH world — for example connecting a ZH-terminated micro servo or sensor to a 2.54mm header on a controller board — and are built to order. Connector lead time is typically 2–3 weeks; wiring harness lead time is typically 3–4 weeks. ➡️ Explore KONNRA wiring harness capabilities
Sourcing the JST ZH 1.5: What Procurement Teams Ask
Engineering decides that a connector will work. Procurement decides whether the supply chain around it is safe. "Can you be a second source without changing our design?" That is what a documented cross-reference is for. The KR1501 is specified against the JST ZH at component level — housing, header, and terminal — with matching pitch and locking system. We confirm equivalence against your specific part number, because circuit count and mounting type change the answer. "What are your lead times?" Connector production lead time is typically 2–3 weeks. Wiring harness lead time is typically 3–4 weeks. Key materials are prestocked to shorten cycles. "How long for samples?" Complete connector set samples can be delivered within 45 days. "What qualifications do you hold?" ISO9001, ISO14001, IATF16949, ISO45001:2018, ISO13485, IPC620, and UL product and operational safety certifications. Automotive-grade series additionally hold LV214 and US CAR-2. "How do we know the parts match your documentation?" A CNAS-accredited laboratory with 45+ sets of precision testing instruments, with dimensional and electrical verification data available on request. 95% of production processes carry full-line intelligent visual CCD inspection; automotive series receive 100% CCD inspection. "Are you a manufacturer or a trader?" A manufacturer. Dongguan Konnra Electronics Co., Ltd., founded 2004, with in-house mould design, injection moulding, stamping, assembly, and inspection — which is why the connector and the cable assembly can come from one quality system. "What volumes can you support?" KONNRA reported 2025 sales of RMB 310 million, with connectors at 60% and wiring harnesses at 40% of the product mix, and a shipping quantity of 400 million pieces, across four production bases with automation coverage exceeding 95%. "Who else buys from you?" KONNRA states that it serves global cooperative clients including BYD, Volkswagen, and DJI. ➡️ Request the vendor qualification pack — certificates, test capability summary, product drawings, and a sample plan in one enquiry.
How to Get a Cross-Reference Check on Your Part Number
Most ZH sourcing enquiries stall on the same thing: the buyer is not sure what information the supplier needs, so the enquiry never gets sent. Here is the complete list. Send us:
- The original JST part number, if you have it — for example
ZHR-3,B3B-ZR,S3B-ZR-SM4A-TF, orSZH-003T-P0.5/SZH-002T-P0.5 - Circuit count and row configuration
- Mounting type and entry direction — DIP or SMT, top entry (straight) or side entry (right-angle)
- Wire specification — AWG size and insulation outside diameter
- Application and annual volume, so configuration, tooling and packaging can be matched to your programme
- A drawing or photo, if the part number is unreadable or the design has been reverse-engineered
- Any qualification requirements — automotive, medical, or specific test standards
When you send a terminal part number, we will confirm the wire range against JST's own documentation. If you are holding a harness drawing that specifies SZH-002T-P0.5 with AWG 30 or 32 wire — a mix-up we see regularly — we will flag it before it becomes a failed build. What you get back: a mapped KONNRA part number with the relevant product and engineering drawings, a specification comparison against your original part, and a sample and quote plan. ➡️ Send your part number or photo · Email: info@konnra.com · Phone: (86)-769-85449875
Engineer's Pre-Release Checklist
Run this before you release a drawing for a 1.5mm pitch connector.
- Pitch confirmed by measurement or part number — not by appearance. The ZH (1.5mm), GH (1.25mm) and PH (2.0mm) housings look similar and do not mate.
- Terminal selected by wire size — and check the direction of the mapping. The higher-numbered SZH terminal is the fine-wire part.
- Insulation diameter inside the accepted range for the chosen terminal, not merely inside the series range.
- Mounting type decided — DIP or SMT — and the footprint matches. Four possible footprints exist in this series.
- Through-hole clearance checked on the far side of the board.
- Voltage requirement checked against the rating. ZH is a 50V family; above that, move to PH (100V) or XH (250V).
- Plating stated explicitly if gold is required — tin is the JST ZH standard finish.
- Mated height checked against the enclosure, including cable bend radius.
➡️ Send us your drawing. We will review it against the KR1501 specification and come back with any mismatch we find — before you commit tooling. Submit a drawing for review
Why Source JST ZH 1.5 Connectors from KONNRA
Dongguan Konnra Electronics Co., Ltd. (brand: KONNRA) was founded in 2004 and is a National High-Tech Enterprise specialising in connector and wiring harness research, development, production, and sales. Manufacturing depth. A vertically integrated process covering precision mould design and manufacturing, automation design, precision injection moulding, stamping, assembly, and CCD visual inspection. Automation coverage exceeds 95% across production lines. Testing and validation. A CNAS-accredited laboratory with 45+ sets of precision testing instruments, and CAE analysis — contact nonlinear analysis, material nonlinear analysis, motion simulation, thermal field analysis, and high-frequency analysis — performed in Ansys 2022 R1. Verification data is available on request. Inspection coverage. Full-line intelligent visual CCD inspection covers 95% of production processes, using Mitsubishi and Panasonic PLC control systems with FA25–35mm optical lenses and 5-megapixel cameras. Automotive connector series receive 100% CCD visual inspection. Quality systems. ISO9001, ISO14001, IATF16949, ISO45001:2018, ISO13485, IPC620, and UL product and operational safety certifications, with automotive-grade series additionally certified to LV214 and US CAR-2. Capacity and delivery. Production bases in Dongguan Wangniudun (30,000 m², 350+ employees), Dongguan Changan (10,000 m², 150+ employees), and Hunan Daoxian (2,600 m², 100+ employees), with regional offices in Beijing, Chongqing, Hunan, Shanghai, and Kunshan. Key materials are prestocked, and complete connector set samples can be delivered within 45 days. KONNRA reported 2025 sales of RMB 310 million, with connectors at 60% and wiring harnesses at 40% of the product mix, and has served global cooperative clients including BYD, Volkswagen, and DJI. Custom and joint R&D. Where a standard 1.5mm part does not fit — an unusual circuit count, a specific mated height, a right-angle configuration, or a material requirement — KONNRA supports customer joint R&D customisation.
Frequently Asked Questions
What is a JST ZH 1.5 connector?
The JST ZH is a 1.5mm pitch, single-row, wire-to-board crimp connector with a housing lance locking system, available in both through-hole and SMT mounting. It is rated 1.0A AC/DC at 50V, mates at a 5.9mm mounting height with 3.5mm depth using a top-entry through-hole header, and uses two crimp terminals: SZH-003T-P0.5 for AWG #32–#28 and SZH-002T-P0.5 for AWG #28–#26. The KONNRA KR1501 series is documented as its cross-reference equivalent, covering 2–16 circuits.
What is the KONNRA equivalent of the JST ZH 1.5?
The KONNRA KR1501 series — a 1.5mm pitch ZH wire-to-board connector covering 2–16 circuits at 1A and 100V, offered as DIP straight 180°, DIP right-angle 90°, SMT straight 180°, and SMT right-angle 90° wafers, plus a housing and a crimp terminal.
Which SZH terminal goes with which wire size?
SZH-003T-P0.5 is the fine-wire terminal: AWG #32 to #28 (0.032–0.08mm²), insulation O.D. 0.5–0.9mm. SZH-002T-P0.5 is the heavier-wire terminal: AWG #28 to #26 (0.08–0.13mm²), insulation O.D. 0.8–1.1mm. The higher part number is the finer wire — which is the opposite of what several third-party guides state. JST rates SZH-002T-P0.5 at 0.7A AC/DC when used with AWG #28 wire, below the 1.0A series rating.
What is the current and voltage rating of the JST ZH?
1.0A AC/DC per contact with AWG #26 wire, at 50V AC/DC. The KONNRA KR1501 is documented at 1A, with a voltage rating of 100V. If your application relies on the higher 100V figure, request the dielectric withstand test data rather than assuming the two are equivalent.
What is the insulation resistance of the JST ZH?
JST documents the ZH series at 500MΩ minimum. KONNRA documents the KR1501 at 100MΩ minimum. This is the one headline parameter where the JST figure is tighter — raise it with KONNRA engineering if your specification requires more than 100MΩ.
What is the difference between JST ZH and JST PH?
Pitch, current and voltage. ZH is 1.5mm, 1A, 50V; PH is 2.0mm, 2A, 100V (JST's PH documentation also gives an operating temperature range of −40 to +105°C, wider than the ZH's −25 to +85°C). They do not mate and do not share footprints. The KONNRA equivalents are KR1501 (ZH) and KR2004 (PH).
What is the difference between JST ZH and JST SH?
Pitch and mounting options. ZH is 1.5mm and offers both through-hole and SMT; SH is 1.0mm and is SMT-only. Both are 1A, 50V families. ZH is the usual choice for micro servos and compact sensors; SH dominates micro FPV and ultra-compact boards. KONNRA equivalents: KR1501 (ZH) and KR1000 (SH).
Does the JST ZH come in a through-hole version?
Yes. JST documents through-hole ZH headers in both top-entry (B…B-ZR) and side-entry (S…B-ZR) types, with -3.4 variants for a 3.4mm soldering length on thicker boards. SMT versions are also available — side-entry with a boss (SM2) and a reinforced type (SM4) in top and side entry. The KONNRA KR1501 covers DIP and SMT in both straight and right-angle orientations.
How many circuits does the JST ZH come in?
JST's ZH housing table as reviewed lists ZHR-2 through ZHR-13. The KONNRA KR1501 is documented from 2 to 16 circuits. If you need 14 or more positions at 1.5mm pitch, check availability rather than assuming the series ends at 13.
Can the JST ZH header be used with IDC termination?
Yes — JST documents the ZH header as compatible with the ZR IDC connector, so the same PCB footprint can carry a crimp socket or an insulation-displacement socket. KONNRA does not document a ZR-type IDC socket for the KR1501, so confirm this specifically if your design depends on it.
How do I identify which JST connector I actually have?
Measure the pitch — the centre-to-centre distance between adjacent contacts. 1.0mm is SH, 1.25mm is GH, 1.5mm is ZH, 2.0mm is PH, 2.5mm is XH. Housing width is a fast cross-check: the ZH housing "A" dimension is (N − 1) × 1.5mm, so a 4-circuit ZH housing measures 4.5mm across the contact field. If you are still unsure, photograph the connector next to a ruler and send it to us.
How long does it take to get samples?
KONNRA can deliver complete connector set samples within 45 days. Connector production lead time is typically 2–3 weeks and wiring harness lead time typically 3–4 weeks.
Start Your Cross-Reference Check
KONNRA supplies the KR1501 series as individual components or as complete pre-crimped cable assemblies, in DIP and SMT configurations, with customisation available for application-specific requirements.
- Request a quote — KR1501 pricing, MOQ, and configuration options for your circuit count and mounting type
- Request a sample — complete connector set samples within 45 days
- Request cross-reference verification — confirm KR1501-to-JST ZH 1.5 equivalence against your specific part number, including terminal wire ranges
- Request drawings — series engineering drawing, product specification, and package specification
- Request a vendor qualification pack — certificates, test capability summary, and quality documentation
- Request adapter and transition cable assemblies — ZH to PH, ZH to DuPont, or other combinations
- Submit a drawing for review — we will flag any specification mismatch before you commit tooling
Contact KONNRA Electronics
- Phone: (86)-769-85449875
- Email: info@konnra.com
- Address: No.6 Nanchang South Road, Chijiao, Wangniudun, Dongguan, Guangdong, China
- Contact us
Sources and method. JST ZH 1.5 figures are taken from JST's published ZH series documentation: pitch (1.5mm), mating height and depth (5.9mm / 3.5mm with the top-entry through-hole header), current rating (1.0A AC/DC with AWG #26), voltage rating (50V AC/DC), temperature range (−25°C to +85°C), housing part numbers and dimensions (ZHR-2 to ZHR-13), through-hole header part numbers (B…B-ZR, S…B-ZR, -3.4 variants), SMT header part numbers (SM2 boss type and SM4 reinforced type), terminal part numbers with wire and insulation ranges (SZH-003T-P0.5: AWG #32–#28, 0.032–0.08mm², insulation 0.5–0.9mm; SZH-002T-P0.5: AWG #28–#26, 0.08–0.13mm², insulation 0.8–1.1mm), terminal current derating (0.7A AC/DC with AWG #28), housing and header materials, the housing lance system, the ZR IDC socket compatibility, and RoHS status. The JST SH, GH, PH and XH figures in the cross-series comparison table are likewise taken from JST's own series documentation for those families. Insulation resistance for the ZH series (500MΩ min.) is taken from JST's published ZH housing datasheets. KONNRA KR1501 specifications are taken from KONNRA's published product and component documentation. Where the two sources disagree, or where a widely-circulated third-party figure differs from the manufacturer's, the difference is stated in this guide rather than smoothed over. Always confirm final dimensional and electrical requirements against the current manufacturer drawing for your specific part number.
https://konnra.com/jst-zh-1-5-connector-complete-guide/
Dongguan Konnra Electronics Co., Ltd
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