PLD-21N30WQ

Overview

The PLD-21N30WQ is a piezoelectric audio indicator from the Mallory Sonalert PL series. It operates on a 12 VDC nominal voltage with a wide input range of 3 to 28 VDC. The device draws 12 mA and produces an 80 dBA dual-tone output at a frequency of 3 kHz. It features wire lead termination and flange mount installation. Physical dimensions are 24 mm in diameter and 9.5 mm in height.

Feature Summary

• Generates a dual-tone acoustic signal for clear auditory alerts
• Operates on low DC voltage with wide input tolerance
• Utilizes piezoelectric technology for reliable sound production
• Designed for direct flange mounting applications

Applications

• Industrial equipment status indication
• Control panel alarm signaling
• Automotive diagnostic indicators
• Consumer appliance alert systems

Procurement Notes

Verify the specific tone configuration and voltage rating against project requirements before ordering. Confirm that the wire lead termination style matches the existing wiring harness or PCB layout. Ensure the flange mount dimension allows for proper mechanical integration into the enclosure. Check for RoHS compliance status if required by regulatory standards.

Selection Notes

Select this component when a compact, low-power audible indicator is needed for DC-powered systems. The dual-tone feature enhances distinguishability in noisy environments compared to single-tone alternatives. Consider the 3-28 VDC operating range for flexibility in varying supply conditions. Evaluate the 80 dBA output level to ensure it meets the necessary audibility distance for the intended application environment.

Part Context

This part belongs to the PL series of piezoelectric buzzers manufactured by Mallory Sonalert. The series is characterized by small form factors and low current consumption. It serves as a standard solution for basic audio alerting needs in electronic devices where space and power efficiency are critical constraints.

Replacement Considerations

Check for PLD-21A29WQ for similar mounting but different acoustic specifications. Verify PFD-21N30WQ for constant tone variants within the same physical footprint. Ensure electrical parameters match exactly when substituting to avoid circuit compatibility issues.