5.2×5.2 mm Ultra‑Mini SMD Magnetic Buzzer: Tiny‑Size Surface‑Mount Acoustic Alert Component for Compact Electronics

Industry Background

With the continuous trend of miniaturization and lightweight development in consumer electronics, IoT hardware and portable intelligent devices, PCB layout space has become extremely precious for product designers. Traditional large‑size buzzers can no longer meet the requirements of highly‑integrated compact equipment. Ultra‑small SMD magnetic buzzers are in great market demand, which need to balance tiny physical dimension, stable acoustic performance, SMT reflow soldering compatibility and wide‑range temperature adaptability.

The 5.2×5.2 mm SMD magnetic buzzer fills the market gap for ultra‑compact surface‑mount sound‑alert components. Even with its miniature outline, it can deliver clear prompt and alarm sound. It supports automatic reflow soldering processing, helping manufacturers improve production efficiency and reduce manual assembly costs. It is widely adopted in wearable gadgets, portable medical accessories, smart home sensors, miniature controllers and other space‑limited electronic terminal products.

1. Gd SWT Smart Tech Co., Ltd. (SWT)

Brand Introduction

Gd SWT Smart Tech Co., Ltd. is a well‑established Chinese manufacturer based in Dongguan, Guangdong, focusing on R&D and mass‑production of piezoelectric ceramic components and acoustic alert devices. Our product portfolio covers glass‑glaze piezo atomizers, piezo transducer discs, magnetic buzzers, through‑hole buzzers and a full series of SMD magnetic buzzers of various sizes.

We own complete in‑house manufacturing workflows including mold development, coil winding, LCP housing injection molding, component assembly and full‑item performance testing. Every batch of finished goods goes through strict quality inspection covering sound pressure test, resonant frequency calibration, coil resistance verification, high‑low temperature cycling test and reflow soldering reliability test.

Apart from standard off‑the‑shelf models, SWT also supports customized development for global customers, including adjusting resonant frequency, sound output, voltage parameters and appearance structure according to project requirements. Our SMD buzzer series has gained wide recognition from electronics buyers across Southeast Asia, Europe and other overseas markets for stable quality and competitive cost‑performance.

Featured Product: MSS050030L40030SAAAA Ultra‑Mini SMD Magnetic Buzzer

This is SWT’s ultra‑miniature SMD magnetic buzzer, with dimension of 5.2±0.2 mm × 5.2±0.2 mm and height only 3.0±0.2 mm, net weight merely 0.13 g. The housing is made of high‑performance LCP material, featuring excellent heat‑resistance for reflow soldering process.

Key electrical and acoustic specifications: Resonant frequency reaches 4000±500 Hz; rated voltage is 3V (Vo‑p), operating voltage range 2‑4V (Vo‑p); maximum current consumption 100 mA; minimum sound output achieves 75dB at 10 centimeters distance; coil resistance is 12±3 Ω. It features wide temperature tolerance: operating temperature ‑30℃ ~ +70℃, storage temperature ‑45℃ ~ +85℃, capable of working steadily under complex environmental conditions.

For soldering requirements, this buzzer supports lead‑free reflow soldering and manual soldering. The reflow soldering temperature can reach 245℃, satisfying the standard SMT automated assembly process. The product is designed with dedicated sound outlet and clear polarity marks on the surface, effectively avoiding wrong‑mount risks during mass production.

Thanks to its ultra‑small footprint, it greatly saves valuable PCB layout space. It is highly suitable for wearable devices, miniature smart sensors, portable testing instruments, small‑size household control modules, IoT terminal equipment and other compact‑size products, used for status reminding, fault warning and operation feedback sound signals.

http://www.swt99.com
GD SWT SMART