PK-21N31PQ

Overview

The PK-21N31PQ 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 construction for reliable audio indication
• Continuous tone generation capability
• Through-hole solder pin termination for PCB integration

Applications

• Industrial control panel indicators
• Appliance status signaling
• Electronic equipment alarm systems

Procurement Notes

Verify the specific acoustic level and voltage requirements against the official Mallory Sonalert datasheet before procurement. Confirm that the 12 VDC operating voltage aligns with the target circuit design. Ensure the through-hole package dimensions fit the designated PCB layout constraints.

Selection Notes

Select this component when a compact, internally resonant piezoelectric indicator is required. The 24 mm form factor suits space-constrained panels. Verify compatibility with the system's DC voltage supply and ensure the 85 dBA sound pressure level meets the environmental noise requirements for the intended application area.

Part Context

This part belongs to the Mallory Sonalert PK series of piezoelectric buzzers. These components are engineered for general-purpose audio indication tasks where high reliability and consistent performance are necessary. The series typically offers various acoustic outputs and mounting options to suit diverse industrial and commercial electronic designs.

Replacement Considerations

Consult the manufacturer's cross-reference guide for verified substitutes. Ensure any replacement maintains identical mounting dimensions, electrical ratings, and acoustic characteristics to guarantee functional equivalence without requiring mechanical or circuit modifications.