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Active piezo buzzer with built-in oscillation circuit, direct DC power input
Waterproof epoxy sealing design, suitable for humid & outdoor working environment
Wide operating voltage: 6VDC ~ 28VDC, compatible with 12V power supply
2800Hz continuous warning tone, high sound output up to 100dB at 10cm
Φ43mm cylindrical structure, M27 thread mounting + M3 screw fixing
Black ABS housing, good impact resistance and durability
Pin terminal connection, simple wiring installation
Laser marking with "MADE IN CHINA", continuous sound version marked "L"
RoHS compliant for global export
Customizable sound frequency, cable length and logo marking available
Item | Parameter |
|---|---|
Model No. | BPC43M-1228-SP |
Buzzer Type | Active Piezo Buzzer (With Built-in Circuit) |
Mounting Method | Pin / M27 Thread Panel Mount |
Outer Diameter | Φ43.0 ±0.5 mm |
Resonant Frequency | 2800Hz |
Operating Voltage | 6 ~ 28 VDC |
Rated Working Voltage | 12VDC |
Sound Pressure Level | 100dB @10cm |
Housing Material | Black ABS |
Sealing | Epoxy Waterproof Sealing |
Tone Type | Continuous Sound (L version) |
Dimensional Tolerance | ±0.5mm unless specified |
Compliance | RoHS |
This waterproof piezo alarm buzzer is designed with M27 external thread for panel installation, fixed by M3 screws. Two pin terminals marked P2(+) and P1(-) indicate polarity for wiring. The product uses epoxy potting to realize waterproof performance, protecting internal piezo ceramic chip against moisture. Laser marking on the surface shows "MADE IN CHINA", the letter "L" represents continuous sound output. The engineering drawing contains full outline size for your cabinet and panel mechanical design.
Our waterproof active piezo buzzers are widely used for continuous audio warning signals:
Security alarm systems
Industrial control cabinet alert
Construction machinery warning reminder
Vehicle & forklift backup alarms
Outdoor monitoring equipment
Fire & safety alert devices
Pump, generator and automation equipment
Q1: Is this piezo buzzer active or passive? This is active piezo buzzer with built-in driving circuit. You only need to apply DC voltage to trigger continuous sound.
Q2: Is this buzzer waterproof? Yes, it adopts epoxy sealing structure for waterproof, suitable for outdoor and humid environment.
Q3: What does "L" mark mean on the buzzer? "L" means continuous sound tone. It will keep beeping when powered on.
Q4: Can I get samples for testing? Yes, sample supply is available for your prototype and performance test.
Q5: Can we customize printing logo or sound frequency? Custom laser marking and acoustic parameter adjustment are acceptable for bulk orders.
Q6: What is your MOQ and lead time? Flexible MOQ. Contact our sales team for bulk price and production schedule.
