PF-21N31PQ

Overview

The PF-21N31PQ is a piezoelectric audio indicator manufactured by Mallory Sonalert Products Inc. It operates within a voltage range of 3 to 30 VDC and produces a sound pressure level of 85 dB at a frequency of 3 kHz. The device features a pulse tone type and utilizes solder pin termination for through-hole mounting. Its physical dimensions are 24 mm in diameter with an overall size of 24 mm x 13.5 mm. The unit weighs approximately 4.4 g and belongs to the PL series of audio devices.

Feature Summary

• Internally driven piezoelectric design for direct signaling
• Wide operating voltage compatibility from 3 to 30 VDC
• Through-hole mounting with solder pin termination

Applications

• Industrial equipment audio signaling
• General alert applications
• Panel-mounted status indicators

Procurement Notes

Verify the specific suffix against official Mallory Sonalert documentation to confirm electrical characteristics and mechanical fit. Ensure the ordering part number matches the required voltage range and tone type. Cross-reference datasheet specifications for terminal type and mounting style before procurement to prevent integration errors.

Selection Notes

Select this component when a wide DC input range and high acoustic output are required for panel-mounted applications. The internal drive capability simplifies circuit design by eliminating external oscillators. Consider the through-hole form factor for robust mechanical attachment in industrial environments requiring durable audio alerts.

Part Context

This component belongs to the PL series of piezoelectric buzzers from Mallory Sonalert. It serves as an internally driven audio indicator suitable for various electronic systems. The product line focuses on reliable acoustic signaling solutions with standardized mounting configurations for easy integration into control panels and industrial machinery.

Replacement Considerations

PL-21N31PQ

FAQ

What is the operating voltage range?

The PF-21N31PQ operates within a voltage range of 3 to 30 VDC.

What is the sound pressure level?

The device produces a sound pressure level of 85 dB.