PKM44EWH1001C

Overview

The PKM44EWH1001C is an externally driven piezoelectric buzzer manufactured by Murata Electronics. It features a 44mm diameter design with wire leads for panel mounting. The component operates at a resonant frequency of 1kHz and delivers a sound pressure level of 68dB when tested at 30V from a distance of 100cm. It is designed for industrial applications and supports an operating temperature range from -20°C to +70°C. The device utilizes lead-free materials and is currently classified as obsolete, indicating it is scheduled for discontinuation.

Feature Summary

• Externally driven piezoelectric transducer technology
• Panel mount configuration with flange and wire leads
• Industrial-grade construction with lead-free compliance

Applications

• GE Healthcare medical equipment
• Industrial audio indicators
• Alarm systems

Procurement Notes

This component is officially marked as End of Life and scheduled for obsolescence by the manufacturer. Procurement should be limited to existing stock or last-time buys. Verify authenticity through authorized channels due to the discontinued status. Confirm that the specific GE Healthcare restriction applies if intended for regulated medical environments. Ensure compatibility with existing 30V drive circuits before finalizing orders.

Selection Notes

Select this part only for legacy replacements where the 44mm form factor and 1kHz resonance are mandatory. Consider the restricted operating temperature range compared to broader industrial standards. Evaluate alternative active buzzers if external driving circuitry complexity can be reduced. Verify that the wire lead termination suits the target PCB or panel assembly requirements without additional adapters.

Part Context

The PKM44 series represents Murata's line of large-diameter piezo buzzers designed for high-volume industrial signaling. This specific model belongs to the externally driven category, requiring an external oscillator circuit to generate sound. It is distinct from self-oscillating variants and is typically specified for applications requiring robust acoustic output in noisy environments.

Replacement Considerations

No public confirmed substitute part numbers are available. Due to the obsolete status and specific dimensional constraints, direct pin-to-pin replacements may not exist. Designers must evaluate mechanical fit and electrical drive requirements carefully when sourcing alternatives.