PFD-21N30PQ

Overview

The PFD-21N30PQ is an internally driven piezoelectric buzzer manufactured by Mallory Sonalert. It operates at a resonant frequency of 3 kHz with a sound pressure level of 80 dB at 12 V. The device is rated for 12 VDC and draws 12 mA. It features through-hole PC pin termination and includes 30 cm wire leads for connection.

Feature Summary

• Internally driven piezoelectric design for direct drive compatibility
• Integrated 30 cm wire leads for simplified installation
• Through-hole mounting via PC pins

Applications

• Electronic equipment status indication
• Audible alert systems
• Industrial control panels

Procurement Notes

Verify the specific suffix 'WQ' or 'PQ' against the manufacturer's current datasheet, as these often denote lead length or packaging variations rather than electrical differences. Confirm that the 30 cm lead configuration matches your assembly requirements before ordering.

Selection Notes

Select this component when an internally driven solution is required to reduce driver circuit complexity. The integrated leads offer convenience over bare pin versions, while the 80 dB output provides adequate audibility for general industrial applications without excessive noise pollution.

Part Context

This part belongs to the Mallory Sonalert PL/PK series of piezoelectric indicators. These components are designed for reliable audible signaling in various electronic environments. The series typically offers options for different voltage ratings, sound levels, and mounting styles to suit diverse enclosure and PCB constraints.

Replacement Considerations

The PLD-21N30WQ is a confirmed substitute with identical electrical specifications (12V, 3kHz, 80dB) and similar lead configurations. Verify physical dimensions and lead attachment methods to ensure mechanical compatibility during replacement.