PFD-27A35ERQ

Overview

The PFD-27A35ERQ is a piezoelectric industrial audio indicator manufactured by Mallory Sonalert Products Inc. It operates on a DC voltage range of 3 to 24V with a rated voltage of 12VDC. The device produces a dual-tone sound at a frequency of 3.5kHz, achieving a sound pressure level of 95dBA. It draws 10mA of current and utilizes wire lead termination for connection. The unit features panel mount installation with dimensions of 37mm x 24mm.

Feature Summary

• Piezoelectric technology providing high-intensity audible alerts
• Dual-tone output for distinct auditory signaling
• Internal driver circuitry for direct DC input operation
• Industrial-grade construction suitable for harsh environments

Applications

• Industrial machinery status indication
• Factory automation alarm systems
• Process control panel audio alerts
• Heavy equipment operator warnings

Procurement Notes

Verify the specific voltage rating and mounting configuration against your system requirements before ordering. Confirm that the wire lead termination type matches your wiring infrastructure. Ensure the operating temperature range meets your environmental conditions. Check for any recent product change notifications or datasheet revisions from the manufacturer to guarantee component compatibility and performance consistency.

Selection Notes

Select this model when a high-decibel, dual-tone alert is required for industrial visibility. The wide voltage input range allows flexibility in power supply design. Consider the physical dimensions and panel cutout requirements during enclosure design. Compare sound pressure levels against ambient noise floors to ensure audibility. Verify certification requirements such as UL or CE if applicable to your deployment region.

Part Context

This component belongs to the PFD series of industrial piezoelectric buzzers from Mallory Sonalert. The series is designed for demanding applications requiring reliable audio signaling. It shares common characteristics with other models in the line, such as internal driving circuits and robust housing materials. The specific suffix indicates terminal type and mounting style variations within the broader product family.

Replacement Considerations

Direct substitutes may include other Mallory Sonalert PFD series models with compatible voltage and frequency ratings. Verify dimensional compatibility for panel mounting. Ensure the replacement maintains the required sound pressure level and tone characteristics. Cross-reference part numbers with official distributor databases for confirmed equivalents.