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Passive piezo design: No internal oscillator, controlled by external MCU square wave signal, flexible tone adjustment for your circuit design.
Ultra-low current consumption: Max 3mA operating current, ideal for battery-powered portable electronic products.
Robust PBT black housing: High heat-resistant plastic shell, improves durability and stability under variable environmental temperature.
Tin-plated brass pins: Excellent solderability for PCB through-hole assembly in mass production.
Low EMI performance: No electromagnetic coil inside, free of magnetic interference to nearby sensitive circuits.
Wide temperature range: Reliable operation from -20℃ ~ +70℃, suitable for indoor and semi-outdoor equipment.
Clear alarm sound: Minimum 80dB sound pressure level at 10cm, provides distinct audio warning.
RoHS compliant: Meets international environmental requirements for export electronics.
Item | Specification | Test Condition |
|---|---|---|
Model | TAT BP1770-40 | - |
Type | Passive Piezoelectric Ceramic Buzzer, Pin Mount | - |
Resonant Frequency | 4000 Hz | Square Wave |
Operating Voltage | 1 ~ 30 Vp-p | - |
Max Current Consumption | 3 mA | - |
Sound Pressure Level | Min.80 dB | At 4KHz, 3.0 Vrms, Sine Wave, 10.0 cm |
Capacitance | 15000 ±30% pF | At 120Hz |
Operating Temperature | -20℃ ~ +70℃ | - |
Storage Temperature | -30℃ ~ +80℃ | - |
Dimension | Φ17 × H7.0 mm | See drawing |
Max Weight | 1.0 gram | - |
Housing Material | Black PBT | - |
Lead Pin | Tin Plated Brass(Sn) | See drawing |
Compliance | RoHS | - |
This passive piezoelectric buzzer works on the piezoelectric effect. When a square wave electrical signal is applied to the internal ceramic wafer, the ceramic sheet deforms and vibrates rapidly to produce audible alert sound. Unlike active buzzers, this model does not contain built-in oscillator circuitry, so external drive signal is mandatory. The black PBT shell offers good heat resistance and mechanical protection. Tin-plated brass through-hole pins ensure stable soldering onto PCB for mass assembly. Without copper coil, this piezo buzzer generates nearly zero electromagnetic interference.
This 4000Hz pin mount piezo buzzer is commonly selected for audio reminder and alarm in:
Smart water / electric energy meters
Household kitchen appliances & control panels
Industrial control equipment & measuring instruments
Portable handheld electronic devices
IoT sensors and security alarm modules
We are a professional electro-acoustic component manufacturer. Customization service is available for TAT BP1770 series. We can adjust resonant frequency, sound pressure, pin length and packaging according to your engineering drawing. Samples can be supplied for lab performance testing before mass production. RoHS certification documents are available upon request. Please contact our engineering team to confirm MOQ and quotation.
Q: Is TAT BP1770-40 active or passive buzzer? A: It is a passive piezo ceramic buzzer. There is no built-in oscillation circuit, external square wave signal from MCU is required to generate sound.
Q: What is the maximum operating current? A: The maximum current consumption is 3mA, very low power draw for battery operated devices.
Q: What material is the buzzer housing? A: The outer shell adopts black PBT material, with good high temperature resistance and mechanical strength. The pins are tin plated brass for easy soldering.
Q: What is the difference between piezo buzzer and electromagnetic buzzer? A: Piezo buzzer uses ceramic vibration, ultra-low current and low EMI. Electromagnetic buzzer relies on coil and metal diaphragm with higher current. Piezo type is better choice for battery-powered and anti-interference sensitive circuits.
Q: Can I get samples for prototype testing? A: Yes, sample service is supported. You may order sample units to test acoustic performance and PCB compatibility.
Q: Does this buzzer comply with RoHS? A: Yes, TAT BP1770-40 is RoHS compliant, relevant certificate can be provided.
Q: Can we customize buzzer parameters for bulk order? A: Customization is available. Our factory can tune resonant frequency and sound pressure to match your project requirements.
