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Ready-to-use active design: Integrated oscillation circuit. Simply apply DC voltage and it sounds, saves PCB space and reduces BOM cost.
Clear & loud acoustic output: Minimum 80dB sound pressure level at 10cm, stable continuous tone for equipment warning and prompt notification.
Wide operating temperature range: Operates reliably from -20℃ to +70℃, suitable for devices used in variable environmental conditions.
Mini lightweight structure: Only approx 1.0g, compact cylindrical form factor ideal for space-limited PCB layouts.
Robust PBT housing & potting treatment: High temperature resistant plastic structure, improves stability and anti-vibration performance for long continuous operation.
RoHS compliant: Meets global environmental requirements for electronic export projects.
Item | Parameter |
|---|---|
Model | BMC9055-0527 |
Type | Active Electromagnetic Buzzer, Built-in Oscillating Circuit |
Dimension | Φ9.2 × H5.5 mm |
Net Weight | Approx 1.0 g |
Rated Voltage | 3 VDC |
Operating Voltage | 2 ~ 4 VDC |
Rated Current | Max. 30mA @ 3VDC |
Sound Output | Min. 80dB at 3VDC, 10cm |
Resonant Frequency | 2700 ±300 Hz |
Tone Type | Continuous Tone |
Operating Temperature | -20℃ ~ +70℃ |
Storage Temperature | -30℃ ~ +80℃ |
Pin Size | L1=4.0±0.5mm, L2=5.5±0.5mm, Pin Diameter Φ0.6±0.1mm |
Housing Material | Black PBT with potting process |
Mounting Type | Through-hole Pin Mount |
This magnetic buzzer adopts electromagnetic working principle. The built-in oscillation circuit removes the requirement for external signal generator. The black PBT plastic shell plus potting technology protects internal magnetic components from vibration and dust. Two through-hole pins allow easy soldering onto printed circuit boards for mass assembly.
This continuous-tone active buzzer is widely selected for electronic devices requiring audio reminder and alarm signals:
Medical testing instruments & portable medical equipment
Industrial control panels and measuring meters
Smart home appliances & kitchen electronics
IoT sensors and security alarm systems
Handheld portable consumer electronic products
We are a professional electro-acoustic component manufacturer. Custom service is available for this BMC9055 series buzzer. We can adjust pin length, resonant frequency, sound pressure, and offer custom packaging or labeling according to your engineering drawing. Samples are available for your lab performance testing before mass production. All products are RoHS compliant and relevant certificates can be provided on request. Please contact our engineering team to get quotation and MOQ details.
Q: What is the difference between active electromagnetic buzzer and passive buzzer? A: Our BMC9055-0527 is active type with internal oscillator. It generates sound once connected to DC power. Passive buzzers need external square wave signal to vibrate and make sound.
Q: Can I test this buzzer with 3V battery directly? A: Yes. Its rated voltage is 3VDC, operating voltage range 2~4VDC. Direct DC power supply can drive it to produce continuous beep tone.
Q: Do you provide samples for performance verification? A: Yes, sample service is supported. You may request sample units to test acoustic performance, soldering compatibility and reliability in your prototype project.
Q: Can I customize pin length or sound volume for bulk order? A: Customization is acceptable. Our factory can modify pin dimension, sound pressure and resonant frequency based on your specification.
Q: What certifications does this buzzer have? A: The BMC9055-0527 buzzer complies with RoHS environmental standard. Certification documents can be supplied upon your request.
Q: What shipping options do you offer for bulk orders and samples? A: We support DHL, UPS, FedEx express, air freight and sea shipment. We will recommend proper shipping method based on order weight, lead time and your budget.
