EFM-390B

Alarms, Buzzers, And Sirens Overview

The EFM-390B is a self-driven piezo transducer manufactured by East Electronics. It operates on a rated voltage of 12V with a range of 3 to 20V and consumes 12mA. The device features a resonant frequency of 3.8kHz and produces a sound pressure level of 90dB at 12V measured from 10cm. It utilizes through-hole PC pins for termination and has physical dimensions of 24mm in diameter and 11mm in height. The operating temperature range spans from -20°C to +70°C.

Alarms, Buzzers, And Sirens Feature Summary

• Built-in active driving circuitry for self-driven operation
• Through-hole mounting with PC pin termination
• High reliability and low power consumption design

Alarms, Buzzers, And Sirens Applications

• Alarm systems
• Buzzers
• Sirens

Alarms, Buzzers, And Sirens Procurement Notes

Verify the specific datasheet version from East Electronics or authorized distributors to confirm exact electrical tolerances and mechanical drawings. Ensure the application environment stays within the specified -20°C to +70°C operating range. Confirm that the 12V rated voltage aligns with the system power supply, noting the 3-20V operational window. Check for any specific RoHS compliance documentation if required by your manufacturing standards.

Alarms, Buzzers, And Sirens Selection Notes

Select this component when an active buzzer with built-in driver circuitry is required for through-hole assembly. The 24mm diameter and 11mm height fit standard alarm housings. The 90dB SPL at 12V provides sufficient audibility for general alerting purposes. Consider the 3.8kHz resonant frequency for tone requirements. Ensure the PCB layout accommodates the PC pin spacing and the 24mm footprint.

Alarms, Buzzers, And Sirens Part Context

This part belongs to the East Electronics line of self-driven piezo transducers designed for audible signaling. It is categorized under alarms, buzzers, and sirens. The EFM-390B variant specifically denotes the 24mm diameter model with 12V rating. It is distinct from passive transducers as it includes internal oscillation components.

Alarms, Buzzers, And Sirens Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs before considering alternative manufacturers.

Alarms, Buzzers, And Sirens FAQ

Is the EFM-390B a passive or active buzzer?

It is an active buzzer with built-in driving circuitry.

What is the resonant frequency of the EFM-390B?

The resonant frequency is 3.8kHz.