PKM33EPH1202C

Overview

The PKM33EPH1202C is an externally driven piezo transducer from the PiezoRinger series by Murata Electronics. It features a 33mm diameter housing with through-hole PC pin termination. The component operates at a rated voltage of 30V and produces a sound pressure level of 68dB at 30V when driven at its resonant frequency of 1.2kHz. The unit utilizes a peak-to-peak signal input type for actuation.

Feature Summary

• Externally driven piezoelectric design requiring external oscillator circuitry
• Through-hole mounting configuration with PC pins for secure board attachment
• High sound pressure output capability at rated operating voltage

Applications

• General purpose audible alarm systems
• Industrial equipment status indicators
• Consumer appliance tone generation

Procurement Notes

Verify current availability as the part status may be listed as obsolete or not recommended for new designs in certain distributor databases. Confirm mechanical dimensions and pin compatibility with existing PCB layouts before procurement. Ensure driving circuits can supply the required peak-to-peak voltage signals for optimal acoustic performance.

Selection Notes

Select this component for applications requiring high-volume audible signaling where through-hole reliability is preferred over surface mount options. Consider the 30V rating and 1.2kHz resonance when designing the drive circuitry to ensure efficient energy transfer and maximum decibel output without exceeding electrical limits.

Part Context

This transducer belongs to Murata's PiezoRinger series, designed for robust audio indication. It differs from active buzzers by requiring an external AC drive signal rather than a DC voltage. The 33mm form factor provides a balance between acoustic power and board space constraints in standard industrial enclosures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify equivalent specifications such as resonant frequency, voltage rating, and mounting style when sourcing alternatives.