W-03A

Overview

The East Electronics W-03A is an ultrasonic annunciator designed for high-frequency signaling applications. It operates within a voltage range of 1 to 8V, with a rated voltage of 2.83 V. The device generates sound at frequencies of 20kHz and 40kHz, achieving a sound pressure level of 95dB @ 2.83V measured at 50cm. It features through-hole PC pins for mounting and has a diameter of approximately 51mm.

Feature Summary

• Excellent high-frequency performance in the 20kHz to 40kHz range
• High reliability and low power consumption design
• Easy installation via through-hole PC pins

Applications

• Ultrasonic signaling systems
• Industrial alarm devices
• Security system sirens

Procurement Notes

Verify the specific frequency requirement (20kHz or 40kHz) against application needs. Confirm voltage compatibility within the 1-8V range. Ensure mechanical fit for the 51mm diameter and through-hole pin configuration. Check datasheet for exact SPL measurements under intended operating conditions.

Selection Notes

Select this component when ultrasonic frequencies are required rather than audible tones. Consider the 95dB SPL output sufficient for the environment. Verify that the driving circuit can supply the necessary current without exceeding the 8V maximum limit. Compare dimensions against available space constraints.

Part Context

This part belongs to the East Electronics ultrasonic annunciator series, which includes models like W-03B and W-05. These components are typically used where high-pitched signaling is necessary for safety or status indication. The W-03A specifically targets the 20kHz/40kHz spectrum.

Replacement Considerations

The W-03B is a similar model in the same series with identical dimensions and electrical characteristics. Verify if any specific frequency preference exists between 20kHz and 40kHz variants before substituting.