PL-21A31PQ

Overview

The PL-21A31PQ is a piezoelectric buzzer from Mallory Sonalert, designed for through-hole mounting. It operates on a 12 VDC nominal voltage with a current rating of 18 mA. The device produces a continuous tone at a frequency of 3 kHz and delivers an acoustic output of 85 dBA. Its physical dimensions are 24 mm in diameter by 14 mm in height, utilizing solder pin termination.

Feature Summary

• Piezoelectric transducer technology for reliable audio indication
• Continuous tone generation capability
• Through-hole solder pin termination for board integration

Applications

• General equipment status indication
• Control panel signaling
• Consumer appliance alerts

Procurement Notes

Verify the specific part number against official Mallory Sonalert documentation to ensure accuracy. Confirm that the 12 VDC operating requirement aligns with your system design. Check RoHS compliance details via the manufacturer datasheet before procurement. Ensure mechanical fitment matches the 24 mm x 14 mm form factor.

Selection Notes

Select this component when a compact, low-power audible indicator is required. The 12 VDC rating suits standard logic-level power supplies. Consider the 85 dBA output level relative to ambient noise requirements. Verify that the continuous tone mode meets the application's signaling needs compared to pulse or siren variants.

Part Context

This part belongs to the PL series of piezoelectric buzzers from Mallory Sonalert. The series offers various acoustic outputs and mounting options. The PL-21A31PQ specifically provides a balanced solution for space-constrained applications requiring moderate sound pressure levels.

Replacement Considerations

Consult official Mallory Sonalert substitution guides for verified equivalents. Cross-reference electrical parameters such as voltage, current, and frequency. Ensure mechanical dimensions and terminal types match the existing PCB layout.