TAT BPC4020-0930 40mm Large Piezo Buzzer 3kHz Continuous Tone, 95–100dB Loud Alarm, Pin Mount

Key Features

• 95–100 dB High-Output at 40 mm Size — the largest, loudest piezo can in the series; clearly audible across warehouses, workshops, corridors and open factory floors where 85 dB panel buzzers are lost.

• 3000 Hz Continuous Tone — lower resonant frequency than typical 4 kHz buzzers travels farther and penetrates obstacles better, making it ideal for open-space and hallway alarms; steady continuous mode for fault/emergency indication.

• Wide Drive 1–25 Vp-p, Only 5 mA — works on 9 V, 12 V and 24 V systems with minimal current; suitable for battery-backed alarm panels and backup signaling circuits.

• Large 35000 pF Ceramic Element — high electro-acoustic conversion efficiency, solid-state with no moving contacts, long service life and no coil burnout risk.

• Dust Mesh + Internal Acoustic Cotton — 208-mesh dust screen on top keeps insects and particles out; cotton liner suppresses airflow noise for a clean, steady tone.

• Through-Hole Pin Mount, 16 mm Spacing — two bottom pins drop into standard PCB/terminal blocks; robust for fixed panel installation.

• Black Housing, -20 °C ~ +70 °C Operation — RoHS compliant, industrial temperature range.

Technical Specifications

Measured at 25±3 °C, 60±10% RH, atmospheric pressure 860–1060 hPa.

Typical Applications

• Industrial Machinery — CNC machine faults, air compressors, water pumps, conveyor-line overload and error beacons

• Security & Fire — perimeter alarm hosts, emergency push buttons, fire alarm panels, sounder strobe backup

• Elevators & Lifting — elevator fault signals, overhead crane/hoist overload warnings, machine-room alarms

• Vehicle Safety — forklift and construction-equipment reverse/warning alarms (low-speed, high-visibility sites)

• Building Automation — server-room water-leak alarms, access-control panels, HVAC fault horns, substation warnings

• Large Appliances — industrial microwaves, drying cabinets, sterilizers, dishwashers end-of-cycle signals

Why Choose TAT BPC4020-0930?

1. Loud Enough for Noisy Spaces — 95–100 dB at 40 mm reaches across a full workshop; small 22/30 mm buzzers cannot compete at floor noise levels.

2. 3 kHz Tone Travels Farther — lower mid-frequency propagates down corridors and around partitions better than 4 kHz high-frequency beeps.

3. 5 mA on Backup Batteries — negligible current draw keeps alarm panels running on standby battery for extended periods.

4. Protected, Clean Sound — dust mesh and acoustic cotton prevent insect/particle ingress and suppress rattling, preserving tone quality over years.

5. Full OEM/ODM Flexibility — intermittent/pulse/dual-tone variants, alternate frequencies, wire leads or connectors, and IP-rated sealed builds available.

Frequently Asked Questions

Q1: Is this an active or passive buzzer? This is a piezoelectric element driven by a square-wave signal at ~3 kHz; typical drive is 9 Vp-p (1–25 Vp-p range). For the DC active version with built-in oscillator, specify when requesting a quote.

Q2: How loud is 95–100 dB? At 10 cm, 95–100 dB is comparable to a power lawnmower or heavy truck — clearly audible across a large room or outdoor work area. SPL drops roughly 6 dB per doubling of distance.

Q3: Can I run it from 12 V or 24 V? Yes. The 1–25 Vp-p range covers 9 V, 12 V and 24 V systems; SPL rises with drive voltage. Use a current-limiting resistor for high-voltage drive.

Q4: What does "continuous tone" mean? The buzzer emits a steady, uninterrupted 3 kHz sound while powered — used for persistent fault/emergency indication, unlike intermittent beepers used for brief reminders.

Q5: How do I mount it? Insert the two bottom pins (16 mm spacing) into your PCB or terminal block and solder/secure; the cylindrical body mounts vertically behind the panel's sound opening.

Q6: Can I get a pulsed or siren-style tone? Yes. Standard is continuous; intermittent (beep-beep), slow-wail and dual-tone patterns are available on request.