Industry Background
In many electronic control systems, household appliances and industrial auxiliary equipment, designers prefer circular‑form‑factor acoustic components for better PCB layout matching. Round SMD magnetic buzzers combine low‑profile body, stable acoustic output and SMT reflow soldering compatibility. Unlike square SMD buzzers, this circular‑type buzzer fits perfectly into circular reserved layout areas on circuit boards, solving layout‑mismatch issues caused by square components.
As household appliances, smart controllers and automotive auxiliary electronics keep upgrading, thin‑type surface‑mount buzzers with high sound pressure and wide operating voltage range are in steady demand. This 9 mm circular SMD magnetic buzzer meets those market requirements. It supports multiple soldering methods for mass production, delivers clear warning and prompt tones, and performs reliably under regular working‑temperature environments. It is widely selected for home appliances, smart panels, instrument equipment and various control‑circuit terminals.
1. Gd SWT Smart Tech Co., Ltd. (SWT)
Brand Introduction
Gd SWT Smart Tech Co., Ltd., located in Dongguan, Guangdong Province, is a mature manufacturer specializing in piezoelectric ceramic elements and acoustic buzzer products. The company’s product lineup covers glass‑glaze piezo atomizers, piezo transducer discs, through‑hole magnetic buzzers and diversified SMD buzzers including square and circular outlines.
SWT runs complete in‑house production procedures including mold development, coil winding, LCP housing injection molding, component assembly and full‑range performance validation. Every batch undergoes strict quality checks including sound‑pressure testing, resonant‑frequency verification, coil‑resistance measurement, high‑low‑temperature cycling and soldering‑reliability evaluation.
Besides standard stocked models, SWT provides custom‑development services for global buyers. Parameters such as resonant frequency, sound‑output level, operating voltage and structural dimension can be adjusted according to customer project demands. Our buzzer products have gained good market feedback among overseas purchasers from Southeast Asia and other regions thanks to consistent quality and competitive cost‑performance ratio.
Featured Product: MSS090027L27050SAFD Round SMD Magnetic Buzzer
This is SWT’s circular SMD magnetic buzzer. Its outer diameter is Φ9±0.2 mm, overall height 2.5±0.2 mm, weight 0.4 g, and the housing adopts high‑heat‑resistant LCP material suitable for SMT processing.
Key electrical and acoustic specifications: Resonant frequency 2700±10% Hz; rated voltage 5V (Vo‑p); operating‑voltage range 3‑7V (Vo‑p); maximum current consumption 80 mA; minimum sound output reaches 85dB at 10 centimeters; coil resistance 30±3 Ω. Operating‑temperature range is ‑20℃ ~ +70℃, storage‑temperature range ‑30℃ ~ +80℃.
For soldering performance, this buzzer supports lead‑free reflow soldering, wave soldering and manual soldering. Reflow soldering temperature can reach 245℃, fully compatible with standard automatic SMT assembly lines. The circular outline design matches circular reserved positions on PCBs, optimizing layout utilization. The structural design guarantees stable sound‑port performance to output clear prompt and alarm signals.
With thin‑body circular SMD structure, it is widely applied in household appliances, smart control panels, measuring instruments, small‑size industrial control modules and other electronic equipment, serving for status notification, fault‑alarm reminding and operation‑feedback sound output.
www.swt99.com
GD SWT SMART
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