PF-27A35WQ

Overview

The PF-27A35WQ is a piezoelectric audio indicator manufactured by Mallory Sonalert. It operates on a voltage range of 3 to 24 VDC with a rated frequency of 3.5 kHz. The device produces a fast pulse tone at a sound pressure level of 95 dBA. Physical dimensions are 30 mm in diameter and 16 mm in height, featuring flange mount installation and wire lead termination.

Feature Summary

• Generates a fast pulse acoustic signal for alarm applications
• Utilizes piezoelectric technology for self-drive operation
• Designed for chassis mounting via integrated flange

Applications

• Industrial equipment status indication
• Control panel alarm signaling
• General purpose audible alerts

Procurement Notes

Verify the specific operating voltage requirements against the datasheet before procurement. Confirm that the 3-24 VDC input range aligns with the system power supply. Ensure mechanical clearance accommodates the 30 mm diameter and 16 mm height. Check for any regional distribution restrictions or RoHS compliance documentation needs prior to ordering.

Selection Notes

Select this component when a high-decibel fast pulse alert is required within a low-voltage DC environment. The flange mount style simplifies enclosure integration compared to panel mount alternatives. Consider the 3.5 kHz frequency for optimal human audibility in noisy industrial settings.

Part Context

This part belongs to the Mallory Sonalert industrial buzzer series. It serves as an audible notification device distinct from visual indicators. The product line focuses on reliable piezoelectric transducers for harsh environments.

Replacement Considerations

PL-27A35WQ offers similar dimensions but provides a slow pulse tone instead of fast pulse. Verify if the change in acoustic pattern meets the application safety requirements.