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Product Detailed Parameters
- Description：BUZZER MAGNETIC 12V 12MM TH
- Series：BMT
- Mfr：BeStar Technologies, Inc.
- Package：Box
- Driver Circuitry：-
- Input Type：-
- Frequency：2.4kHz
- Technology：Magnetic
- Operating Mode：-
- Duration：-
- Sound Pressure Level (SPL)：85dB @ 12V, 10cm
- Current - Supply：40mA
- Port Location：Top
- Operating Temperature：-40°C ~ 85°C
- Approval Agency：-
- Ratings：-
- Ingress Protection：-
- Mounting Type：Through Hole
- Termination：PC Pins
- Height - Seated (Max)：0.571" (14.50mm)
- Voltage - Rated：12 V
- Voltage Range：7 ~ 16V
- Size / Dimension：0.472" Dia (12.00mm)
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Overview
The BMT1212H09 is an externally driven magnetic buzzer manufactured by BeStar Technologies, Inc. This through-hole component features a 12mm diameter and 9mm height. It operates at a resonant frequency of 2400Hz with a nominal voltage of 12V. The device draws 40mA current and produces a sound pressure level of 85dB when measured at 10cm distance under 12V conditions. The coil resistance is specified as 0.14kΩ with a tolerance of ±14Ω. Operating temperatures range from -25°C to 70°C.
Feature Summary
- Externally driven magnetic transducer design for acoustic signaling
- Through-hole mounting configuration with PC pins
- High sound pressure output capability at standard operating voltage
Applications
- Electronic equipment status indication
- Alarm systems requiring audible alerts
- Consumer appliance signaling interfaces
Procurement Notes
Verify the specific ordering suffix against manufacturer documentation to confirm exact specifications. Ensure that any additional characters in the part number do not alter the electrical parameters or mechanical dimensions. Confirm compatibility with existing PCB layouts regarding pin spacing and hole diameters before finalizing procurement decisions.
Selection Notes
Select this component based on the required 12V operating voltage and 2400Hz resonant frequency. Consider the 85dB sound pressure level requirement for the intended application environment. Verify that the through-hole package fits the designated PCB footprint and that the operating temperature range meets the environmental constraints of the final product assembly.
Part Context
This component belongs to the BeStar Technologies magnetic buzzer series, designed for audible signaling applications. The BMT1212H09 utilizes electromagnetic principles to generate sound waves. It is distinct from piezoelectric alternatives by its specific drive requirements and frequency characteristics. The product line focuses on reliable acoustic output for industrial and consumer electronics.
Replacement Considerations
Cross-reference with other 12V magnetic buzzers having similar 2400Hz resonance and 85dB SPL ratings. Verify mechanical dimensions including the 12mm diameter and 9mm height for direct fitment. Check coil resistance values near 0.14kΩ to ensure compatible drive circuitry without modification.
