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Passive Piezo Design: No internal oscillation circuit. You can freely adjust the alert tone frequency via external MCU square wave.
Ultra-Thin 2.6mm Height: Low-profile design saves vertical PCB space, ideal for slim, miniaturized electronic assemblies.
Ultra-Low Power Consumption: Max rated current only 3mA, perfect for battery-operated portable & wearable electronics.
Low EMI Performance: No electromagnetic coil inside, no magnetic interference to nearby sensitive circuits.
Wide Operating Temperature Range: Reliable performance from -30℃ ~ +70℃, suitable for harsh environment applications.
Clear Audible Warning: Minimum 70dB sound pressure level measured at 10cm distance for audible reminder signals.
RoHS Compliance: Meets global environmental requirements for exported electronic goods.
Item | Specification | Test Condition |
|---|---|---|
Model | TAT BP1625S-40 | - |
Type | Passive Piezoelectric Ceramic Buzzer, Pin Mount | - |
Resonant Frequency | 4000 ± 500 Hz | - |
Operating Voltage | 1 ~ 25 Vp-p | - |
Max Rated Current | 3 mA | At 4KHz, 50% duty Square Wave, 3Vp-p |
Sound Output | Min.70dB @10cm | At 4KHz, 50% duty Square Wave, 3Vp-p |
Capacitance | 18000 ±30% pF | At 1KHz |
Operating Temperature | -30℃ ~ +70℃ | - |
Storage Temperature | -40℃ ~ +85℃ | - |
Net Weight | Approx. 1g | - |
Environmental Compliance | RoHS | Yes |
Unless otherwise specified, parts are measured under ambient condition: Temperature: 5 ~ 35℃, Humidity: 45% ~ 85%R.H., Atmospheric pressure: 860 ~ 1060hPa. Standard measuring condition: Temperature: 25±3℃, Humidity: 60±10%R.H., Atmospheric pressure: 860 ~1060hPa.
This passive piezoelectric buzzer operates based on the piezoelectric effect. When external square wave signal is applied to the piezo ceramic chip, the ceramic plate generates mechanical deformation and rapid vibration to produce audible sound. As a passive buzzer, there is no built-in oscillator. An external MCU square wave signal is required to trigger sound output. Without copper coil, it creates much lower electromagnetic interference than electromagnetic buzzers.
This ultra-thin pin mount piezo buzzer is widely used for audio reminder and alarm signals:
Slim IoT modules & smart sensors
Wearable electronic equipment
Thin household appliance control panels
Mini security alarm devices
Portable handheld instruments
Flat panel medical electronics
We are a professional manufacturer of electro-acoustic components. Custom service is available for BP1625S series. We can customize resonant frequency, sound pressure level and pin length according to your project drawings. Samples can be supplied for lab performance testing before mass production. RoHS certificate is available on request. Contact our engineer team to confirm MOQ and quotation.
Q: Is BP1625S-40 active or passive buzzer? A: It is passive piezo buzzer, no built-in oscillator. External MCU square wave signal is required to produce sound.
Q: What is the maximum rated current? A: Max rated current is 3mA, ultra-low power consumption for battery-powered products.
Q: What is the dimension of this buzzer? A: 16.3×16.3×2.6mm, ultra-thin pin mount design for PCB soldering.
Q: What is the difference between piezo buzzer and electromagnetic buzzer? A: Piezo buzzer uses ceramic wafer vibration, low current and low EMI. Electromagnetic buzzer relies on coil and diaphragm with higher current consumption. This piezo model is more suitable for slim and compact electronic devices.
Q: Can I get samples for testing? A: Yes, samples are available for prototype and acoustic performance verification.
Q: Is this buzzer RoHS compliant? A: Yes, TAT BP1625S-40 meets RoHS requirement, certificate can be provided.
