EFM-471AL

Alarms, Buzzers, And Sirens Overview

The EFM-471AL is a piezo sounder manufactured by East Electronics, designed for continuous operation with wire lead termination. It operates at a nominal voltage of 24 V and draws a current of 20 mA. The device generates an acoustic output of 90 dB measured at a distance of 30 cm. Its operating frequency is specified at 3.7 kHz. The unit features a maximum seated height of 14.30 mm (0.563 inches) and utilizes a 37.8 mm wire lead configuration.

Alarms, Buzzers, And Sirens Feature Summary

• Continuous operation mode for sustained alarm signaling
• Piezoelectric sound generation mechanism
• Integrated wire leads for direct circuit connection

Alarms, Buzzers, And Sirens Applications

• Industrial equipment status indicators
• Security system sirens
• Appliance audible alerts

Alarms, Buzzers, And Sirens Procurement Notes

Verify the manufacturer designation as East Electronics or Ningbo East Electronics Limited to ensure component authenticity. Confirm that the wire lead length and termination style match the specific 37.8 mm requirement. Cross-reference the 24 V rating and 3.7 kHz frequency against the target circuit design to prevent operational mismatch. Ensure the datasheet version aligns with the physical dimensions provided.

Alarms, Buzzers, And Sirens Selection Notes

Select this component when a high-decibel audible alert is required for 24 V systems. The integrated wire leads simplify assembly compared to surface-mount alternatives. Consider the 14.30 mm height constraint during enclosure design. Verify that the 90 dB output level meets regulatory noise requirements for the intended installation environment.

Alarms, Buzzers, And Sirens Part Context

This part belongs to the East Electronics piezo sounder family, which includes variants such as the EFM-471BL and EFM-471L. These components are categorized under alarms, buzzers, and sirens. The series is characterized by robust construction suitable for industrial and commercial applications requiring reliable audible feedback.

Alarms, Buzzers, And Sirens Replacement Considerations

Direct substitutes include the EFM-471BL and EFM-471L from the same manufacturer. Verify electrical parameters and physical dimensions before substitution. Ensure the replacement maintains the 24 V rating and 3.7 kHz frequency to preserve system compatibility.