PK-27N25WQ

Overview

The PK-27N25WQ is a piezoelectric buzzer from the PK series by Mallory Sonalert Products Inc. It operates on DC input with a rated voltage of 12 V and a supply current of 8 mA. The device produces a continuous single-tone sound at a frequency of 2.5 kHz, achieving a sound pressure level of 90 dB at 12 V measured at 30 cm. Designed for panel mounting via flange, it features wire lead terminations. The unit measures 30.00 mm in diameter and has a maximum installation height of 16.20 mm. It functions within a temperature range of -20°C to 70°C.

Feature Summary

• Integrates internal drive circuitry for direct connection without external oscillators
• Provides consistent acoustic output through piezoelectric technology
• Features flange-style panel mounting for secure mechanical attachment

Applications

• Industrial equipment status indication
• Control panel alarm signaling
• Appliance operational feedback

Procurement Notes

Verify the specific suffix requirements against the official Mallory Sonalert part numbering guide to ensure correct termination and acoustic specifications. Confirm that the operating voltage aligns with the 12 VDC rating for optimal performance. Check RoHS compliance documentation if required for your assembly process. Ensure panel cutout dimensions match the 30 mm diameter specification for proper fitment.

Selection Notes

Select this component when a self-contained audible indicator with moderate sound pressure is required. The integrated driver simplifies circuit design by eliminating the need for external driving components. Consider the flange mount style for applications requiring robust panel attachment. Evaluate the 2.5 kHz frequency against human hearing sensitivity for effective alerting in noisy environments.

Part Context

This model belongs to the PK series of piezoelectric indicators, which are designed for industrial and commercial applications. The series offers various voltage and acoustic options. The PK-27N25WQ specifically targets low-current applications requiring reliable visual and audible alerts. It represents a standard solution for basic alarm and indication tasks in control systems.

Replacement Considerations

Consult the Mallory Sonalert cross-reference guide for compatible alternatives. Verify that any substitute matches the 30 mm diameter, 16.20 mm height, and 12 VDC electrical ratings. Ensure the replacement maintains the same flange mounting configuration and wire lead termination type.