EFM-250D

Alarms, Buzzers, And Sirens Overview

The EFM-250D is a passive piezoelectric buzzer manufactured by East Electronics. It operates within a voltage range of 3 to 15V and features a resonant frequency of 4.1kHz. The device produces a sound pressure level of 80dB at 5V measured at 10cm, with a supply current of 2mA. It utilizes through-hole termination with a diameter of 14mm. The component supports continuous operation mode and functions reliably across an operating temperature range of -40°C to +85°C.

Alarms, Buzzers, And Sirens Feature Summary

• Passive design requiring external driver circuitry for operation
• Sealed construction suitable for wave soldering and washing processes
• Compact structure designed for integration into space-constrained assemblies

Alarms, Buzzers, And Sirens Applications

• Automatic control equipment
• Communication equipment
• Electronic devices requiring audible signaling

Alarms, Buzzers, And Sirens Procurement Notes

Verify the specific datasheet version provided by East Electronics to confirm exact electrical tolerances and mechanical dimensions. Ensure the receiving environment supports the specified operating temperature range of -40°C to +85°C. Confirm that the PCB layout accommodates the 14mm diameter through-hole package and that the driving circuit provides the necessary frequency signal for optimal performance.

Alarms, Buzzers, And Sirens Selection Notes

Select this component when a passive buzzer is required for applications needing external frequency control. The 4.1kHz resonant frequency and 80dB SPL provide clear audible feedback. Verify that the system power supply can deliver the required 2mA current at voltages between 3V and 15V. Consider the sealed construction if exposure to cleaning agents or wave soldering is part of the manufacturing process.

Alarms, Buzzers, And Sirens Part Context

The EFM-250D belongs to the family of piezoelectric buzzers produced by East Electronics. These components are designed for general-purpose audible indication in electronic systems. The passive nature distinguishes it from active buzzers, allowing for variable tone generation via external drivers. The 14mm form factor is standard for many industrial and consumer electronics enclosures.

Alarms, Buzzers, And Sirens Replacement Considerations

Direct substitutes must match the 14mm diameter, 4.1kHz resonant frequency, and passive operation mode. Verify that alternative parts support the same 3-15V operating range and -40°C to +85°C temperature specifications. Ensure mechanical compatibility with existing through-hole mounting holes and wave soldering requirements.