TAT BM1614-1220 Passive Magnetic Buzzer 16mm 2048Hz 12Vo-p 85dB Pin Mount

Key Features

• 2048 Hz Warm Magnetic Tone — coil-driven diaphragm at a lower, softer frequency than high-pitched piezo; clear and non-fatiguing for repeated user feedback on appliances and instruments.

• 12 Vo-p Rated, 8–15 Vo-p Wide Range — compatible with 9 V, 12 V and 15 V systems; max 40 mA at rated conditions.

• ≥85 dB SPL at 10 cm (12 Vo-p) — clear panel-level alert for indoor meters, appliances and control boards.

• 115 ± 15 Ω Coil — inductive winding matched to common NPN/MOSFET and half-bridge drivers; no specialized piezo boost circuit needed.

• Potted Top Seal — epoxy potting protects coil and diaphragm from dust, humidity and mechanical vibration, outlasting open piezo elements in harsh enclosures.

• Rear Masking Label — shielding sticker reduces stray vibration and electromagnetic coupling into nearby circuits.

• Through-Hole Pins, 7.6 mm Spacing — two Φ0.7 mm pins (L1=5.5 / L2=7.0 mm) drop into standard PCB footprints; wave-solder and hand-solder friendly.

• Black PPO Housing, -20 °C ~ +70 °C; RoHS compliant.

Technical Specifications

Typical Applications

• Instruments & Meters — multimeters, oscilloscopes, temperature controllers, timers, digital scales

• Home Appliances — microwaves, ovens, rice cookers, washing machines, dishwasher finish signals

• Security & Doorbells — access panels, smoke detectors, wired doorbells, alarm keypads

• Automotive — dashboard reminders, parking sensors, OBD dongles, aftermarket alarms

• Toys & Education — electronic keyboards, quiz buzzers, learning machines, talking books

• Medical Portable — glucose meters, blood pressure monitors, portable monitor alerts

• Industrial Panels — small control-cabinet beepers, power-supply status alarms

Why Choose TAT BM1614-1220?

1. Warmer Tone Than Piezo — 2048 Hz magnetic output sounds soft and professional, ideal for user-interactive appliances and meters where a piercing 4 kHz piezo would annoy.

2. Potted for Harsh Environments — sealed top resists dust and humidity; suited to kitchens, workshops and vibrating equipment.

3. Simple 12 V Drive — 115 Ω coil and 8–15 Vo-p range pair with cheap transistor drivers; no specialized piezo boost circuit.

4. Standard Through-Hole Footprint — 7.6 mm pin spacing fits generic PCB pads; rework and replacement are straightforward.

5. Full OEM/ODM Flexibility — alternate frequencies, pin lengths, wire-lead/connector versions and potting heights available.

Frequently Asked Questions

Q1: Active or passive? Passive magnetic. Feed a square wave at 2048 Hz (≈50% duty) from an MCU PWM or oscillator; DC voltage alone makes no sound.

Q2: How does a magnetic buzzer differ from a piezo buzzer? A magnetic buzzer uses a coil and diaphragm (inductive, ~2 kHz warm tone, lower drive voltage); a piezo uses a ceramic element (capacitive, high-frequency 4 kHz tone). Choose magnetic for softer feedback, piezo for loud high-pitched alarms.

Q3: What voltage drives it? Rated 12 Vo-p, operating 8–15 Vo-p square wave. Below 8 Vo-p SPL drops; use a transistor/MOSFET stage for higher-voltage drive.

Q4: How loud is 85 dB? At 10 cm, 85 dB is a clear indoor alert — comparable to an alarm clock or clear spoken notice, suited to panel and handheld use.

Q5: Is it sealed? Yes, the top is potted with epoxy for dust and moisture resistance; for full waterproofing add an acoustic mesh gasket on the enclosure.

Q6: Can I get wire leads instead of pins? Yes. Standard is through-hole pins; wire-lead and JST connector variants are available on request.