PKM33EPH1201C

Overview

The PKM33EPH1201C is a through-hole audio piezo transducer manufactured by Murata Electronics. It operates on a peak-to-peak signal voltage rating of 30 V and generates an acoustic output of 68 dB at 30 V measured from a distance of 100 cm. The device is tuned to a rated frequency of 1.2 kHz and utilizes external driving circuitry. It features a top port location for sound emission and functions in a ringer mode. The component measures 33.00 mm in diameter with a maximum height of 8.00 mm, designed for PCB pin installation.

Feature Summary

• Piezoelectric technology enables reliable audio signal generation without internal active components.
• External drive input allows flexible integration with various control circuits.
• Through-hole mounting ensures secure mechanical attachment to printed circuit boards.

Applications

• Audio signaling devices requiring high volume output
• Industrial alarm systems
• Appliance status indicators

Procurement Notes

Verify the specific suffix codes against official Murata documentation to confirm exact acoustic and electrical characteristics. Confirm that the through-hole package dimensions match the target PCB layout. Check current product lifecycle status as availability may vary. Ensure the driving circuit can supply the required peak-to-peak voltage for optimal performance.

Selection Notes

Select this component when a high-decibel audible alert is necessary for industrial or consumer applications. The 33 mm diameter provides a large radiating surface for increased sound pressure levels. Verify that the operating temperature range of -20°C to 70°C aligns with the environmental conditions of the intended deployment site.

Part Context

This part belongs to the PK series of audio piezo transducers from Murata Electronics. These components are designed for general-purpose audio indication tasks. The series offers various sizes and tuning frequencies to suit different enclosure constraints and acoustic requirements.

Replacement Considerations

Consult official Murata documentation for verified substitute part numbers. Do not assume cross-compatibility based on physical dimensions alone. Electrical parameters such as resonant frequency and impedance must be matched precisely.