PK-21N30PQ

Overview

The PK-21N30PQ is a piezoelectric buzzer from Mallory Sonalert, designed for board-mounted applications. It operates on a continuous tone at a frequency of 3 kHz with an acoustic output of 85 dB. The device is rated for a voltage range of 3 to 24 VDC and draws a current of 18 mA at the nominal 12 VDC rating. Physical dimensions are 24 mm in diameter by 14 mm in height, utilizing through-hole solder pin termination.

Feature Summary

• Piezoelectric transducer technology for reliable audio indication
• Continuous tone operation suitable for steady-state alerts
• Through-hole solder pin mounting for PCB integration

Applications

• Industrial control panel indicators
• Consumer appliance status signaling
• Transportation equipment monitoring systems

Procurement Notes

Verify the exact part number against official Mallory Sonalert documentation, as the requested model PK-21N30PQ differs from the documented PK-21A31PQ. Confirm that the suffix 'N' does not indicate a variant with different electrical or mechanical specifications than the standard 'A' series. Ensure compatibility with the intended operating voltage and acoustic requirements before procurement.

Selection Notes

Select this component when a compact, board-mounted piezoelectric buzzer is required for continuous audible signaling. The 3 kHz frequency provides clear audibility, while the 85 dB output ensures detection in moderate noise environments. Verify that the 18 mA current draw fits within the system's power budget and that the 24x14mm form factor accommodates the available PCB space.

Part Context

This component belongs to the PK series of piezoelectric buzzers manufactured by Mallory Sonalert Products Inc. The series is characterized by its small footprint and robust construction for industrial and commercial use. As a board-mounted indicator, it serves as a fundamental audio alerting element in electronic assemblies requiring simple, direct-drive sound generation without external drivers.

FAQ

What is the operating voltage range for the PK-21N30PQ?

The device operates within a DC voltage range of 3 to 24 volts.

Does this buzzer require an external driver circuit?

No, it is a passive piezoelectric buzzer that generates a continuous tone directly when DC voltage is applied.