11월 28, 2025
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In today's fast-growing IoT and automotive markets, compact yet high-performance audible indicators like the WST-0904T active magnetic buzzer from Soberton Inc. are in high demand. With an impressive 80dB sound pressure level (SPL) at just 3V and a compact 9.2mm diameter, this ROHS-compliant component is engineered for reliability in space-constrained applications. Whether you're designing alarm systems, medical devices, or smart home appliances, the WST-0904T delivers clear audio feedback with minimal power consumption. Read on to explore its technical advantages, application scenarios, and how it compares to alternatives.
The WST-0904T is an active magnetic buzzer with an integrated drive circuit, eliminating the need for external oscillators. Key features include:
Plug-in design (D=9.2mm, Height=4.5mm) for easy PCB mounting
Operating voltage range: 2V–5V (ideal for battery-powered devices)
Frequency: 2.7kHz ±500Hz (optimized for human auditory sensitivity)
Wide temperature range: -20°C to +70°C (per manufacturer datasheet)
| Parameter | Value | Standard/Reference |
|---|---|---|
| Sound Pressure Level (SPL) | 80dB @ 3V, 10cm | IEC 60651 |
| Operating Voltage | 2V–5V DC | Soberton datasheet |
| Frequency | 2.7kHz ±500Hz | Manufacturer specs |
| Temperature Range | -20°C to +70°C | IEC 60068 |
When choosing between active buzzers like the WST-0904T and alternatives, consider:
Voltage Compatibility: Verify your system's voltage matches the buzzer's 2V–5V range.
SPL Requirements: 80dB is suitable for most indoor applications; higher SPL may be needed for industrial environments.
Size Constraints: The 9.2mm diameter suits space-limited designs.
Medical Devices: Audible alerts in portable monitors (low power consumption critical)
Automotive: Seatbelt reminders and turn signal indicators
Smart Home: Door/window sensors and security alarms
According to Market Research Future, the global buzzer market will grow at 5.8% CAGR through 2027, driven by IoT and automotive demand. The WST-0904T's ROHS compliance positions it well for EU and North American markets.
| Model | SPL | Voltage | Size | Advantage |
|---|---|---|---|---|
| WST-0904T | 80dB | 2V–5V | Ø9.2mm | Integrated driver, ROHS |
| PUI AB-12R | 85dB | 3V–12V | Ø12mm | Higher SPL |
| Mallory SCP-09 | 75dB | 1.5V–3V | Ø9mm | Lower voltage |
The WST-0904T balances size, performance, and ease of integration.
Yes, within its rated temperature range (-20°C to +70°C).
No, it includes an integrated oscillator circuit.
Typically 50,000 hours at nominal voltage (per accelerated life testing).
Magnetic types like the WST-0904T offer lower frequency tones at lower voltages.
Yes, wave or hand soldering at ≤260°C for ≤5 seconds (per IPC standards).
Emerging applications in wearables and AR/VR devices will drive demand for smaller, more efficient buzzers. Soberton is expected to release a 7mm variant in 2024.
For pricing, samples, or technical support: Email: sales@censtry.com
The WST-0904T active magnetic buzzer combines high SPL, compact dimensions, and easy integration—making it a versatile choice for modern electronic designs. With authoritative compliance and proven reliability, it addresses both current market needs and future miniaturization trends.
