EFM-620LA

Alarms, Buzzers, And Sirens Overview

The East Electronics EFM-620LA is an internally driven piezoelectric buzzer designed for alarm and indicator applications. It operates on a rated DC voltage of 9V with a functional range of 7 to 20V. The device features a resonant frequency of 3.2kHz and produces a sound pressure level of 110.46dB at 9V measured from a distance of 30cm. It draws 50mA of current and utilizes through-hole PC pins for mounting. The unit has a diameter of 40mm and functions within an operating temperature range of -20°C to +60°C.

Alarms, Buzzers, And Sirens Feature Summary

• Internally driven piezoelectric technology for single-tone operation
• High acoustic output capability with specified decibel rating
• Through-hole mounting configuration with standard PC pins
• Wide operational voltage tolerance supporting 7V to 20V input

Alarms, Buzzers, And Sirens Applications

• Industrial equipment status indicators
• Security system alarms
• Consumer appliance auditory feedback
• Medical device alert signals

Alarms, Buzzers, And Sirens Procurement Notes

Verify the specific suffix LA against the manufacturer datasheet to confirm internal driver inclusion, as variations exist within the EFM series. Ensure the required sound pressure level meets application standards, noting that the LA variant specifies higher output than the base EFM-620 model. Confirm through-hole compatibility with the target PCB layout before finalizing procurement orders.

Alarms, Buzzers, And Sirens Selection Notes

Select this component when high-volume audible alerts are required without external driving circuitry. The internally driven design simplifies board space and reduces component count compared to passive buzzers. Consider the 40mm diameter constraint during mechanical enclosure design. Verify that the 9V rated voltage aligns with the system power supply rails to ensure optimal performance and longevity.

Alarms, Buzzers, And Sirens Part Context

This part belongs to the East Electronics EFM series of piezoelectric buzzers. The EFM-620LA differs from the standard EFM-620 by incorporating internal driver circuitry and offering significantly higher sound pressure levels. While the base model may require external oscillators, the LA variant provides immediate activation upon DC voltage application, streamlining integration into digital control systems.

Alarms, Buzzers, And Sirens Replacement Considerations

Direct substitutes must match the 40mm diameter, 3.2kHz frequency, and internally driven piezo architecture. Verify that alternative components support the same 7-20V input range and provide comparable acoustic output at 9V. Ensure pinout compatibility for through-hole mounting to avoid PCB redesign efforts during replacement.