PK-21A31PQ

Overview

The PK-21A31PQ is a piezoelectric buzzer from Mallory Sonalert, designed for through-hole mounting. It operates on a continuous tone at a frequency of 3 kHz with a sound pressure level of 85 dBA. The device supports a voltage range of 3 to 24 VDC and has a rated voltage of 12 VDC, drawing 18 mA. Its dimensions are 24 mm in diameter and 14 mm in height, featuring solder pin termination.

Feature Summary

• Generates a continuous audible alert using piezoelectric technology
• Supports wide DC input voltage range for flexible circuit integration
• Features compact cylindrical form factor for space-constrained panel or board applications

Applications

• Industrial control panels requiring visual and audio status indication
• Consumer electronics devices needing simple alarm signals
• Transportation equipment monitoring systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure correct acoustic output and electrical ratings. Confirm that the through-hole package style matches your PCB layout requirements. Check for RoHS compliance documentation if environmental regulations apply to your assembly process.

Selection Notes

Select this component when a constant tone indicator is required within a 3-24 VDC supply environment. Ensure the 85 dBA output meets the ambient noise requirements of the installation site. Verify that the 24 mm diameter footprint fits the designated enclosure or panel opening constraints.

Part Context

This part belongs to the Mallory Sonalert line of audio indicators and alarms. The brand specializes in piezoelectric transducers and buzzers for industrial, medical, and consumer markets. The PK series typically denotes standard piezoelectric buzzers with through-hole mounting options.

FAQ

What is the operating voltage range?

The PK-21A31PQ operates within a voltage range of 3 to 24 VDC.

Is the tone continuous or pulsed?

The device produces a continuous tone at 3 kHz.