PK-21N30WQ

Overview

The PK-21N30WQ is a piezoelectric industrial buzzer from the PK series by Mallory Sonalert. It operates on a voltage range of 3 to 24 VDC with a rated voltage of 12 VDC and a current draw of 15 mA. The device produces a continuous tone at a frequency of 3.5 kHz with a sound pressure level of 90 dBA. It features wire lead termination and flange mount installation. The physical dimensions are 30 mm in diameter and 16 mm in height, weighing 6.8 g.

Feature Summary

• Piezoelectric technology for reliable audio indication
• Continuous tone output for steady state alerts
• Flange mount design for secure panel integration
• Wide operating voltage range for flexible power supply compatibility

Applications

• Industrial machinery status monitoring
• Control panel audible signaling
• Equipment fault detection systems
• Process alarm notification units

Procurement Notes

Verify the specific suffix WQ against official Mallory Sonalert documentation to confirm wire lead type and insulation specifications. Ensure the mounting hole diameter matches the 30 mm flange requirement. Confirm that the 90 dBA acoustic output meets the ambient noise requirements of the intended installation environment before finalizing procurement.

Selection Notes

Select this component when a compact, high-decibel continuous indicator is required for industrial enclosures. The 30 mm form factor suits panels with limited space compared to larger SC series units. Verify that the 15 mA current consumption aligns with the available driver circuit capacity. Consider the flange mount style if screw-down retention is preferred over adhesive or snap-fit methods.

Part Context

This unit belongs to the PK series of piezoelectric buzzers designed for industrial environments. The series emphasizes durability and consistent acoustic performance across varying temperatures. The PK line typically utilizes robust plastic housings and metal flanges to withstand harsh operational conditions while maintaining precise frequency stability.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-referencing requires matching the 30 mm diameter, 16 mm height, 90 dBA SPL, and 3.5 kHz frequency specifications with alternative manufacturer data sheets.