PKM22EPH2001

Overview

The Murata PKM22EPH2001 is a piezoelectric buzzer designed for audible signaling applications. It operates at a resonant frequency of 2.2 kHz with a nominal drive voltage of 3.0 VDC. The device features an integrated oscillator circuit, allowing it to be driven directly by a DC supply without external components. Key electrical specifications include a sound pressure level of 85 dB or higher measured at 10 cm under standard test conditions. The unit utilizes a metal case construction for durability and electromagnetic interference shielding.

Feature Summary

• Integrated oscillator circuit enables direct DC drive capability
• Metal case construction provides mechanical robustness and EMI shielding
• Piezoelectric element ensures high reliability and long operational life
• Compact form factor suitable for space-constrained electronic assemblies

Applications

• Consumer electronics audio alerts
• Industrial control panel signaling
• Medical equipment status indication
• Automotive interior warning systems

Procurement Notes

Verify the specific suffix codes on the component marking against the official Murata datasheet to confirm exact acoustic and electrical tolerances. Ensure the operating voltage matches the rated specification to prevent damage. Confirm package compatibility with your PCB footprint design before finalizing procurement orders.

Selection Notes

Select this component when a self-oscillating buzzer is required to simplify driver circuitry. Consider the 2.2 kHz frequency for optimal human hearing sensitivity in alert scenarios. Evaluate the 85 dB SPL requirement against ambient noise levels in the target application environment to ensure audibility.

Part Context

This part belongs to Murata's PKM series of piezoelectric buzzers. The series is characterized by low power consumption and high sound output efficiency. The PKM22EPH2001 variant specifically targets applications requiring a mid-range frequency tone with integrated driving capabilities.

Replacement Considerations

Consult Murata's official cross-reference documentation for verified substitutes. Generic replacements may differ in impedance characteristics or mounting dimensions. Verify that any alternative part meets the same 2.2 kHz resonant frequency and 3.0 VDC operating requirements.