WM-55A103

Overview

The WM-55A103 is an electret condenser microphone manufactured by Panasonic Electronic Components. It features a unidirectional polar pattern with a sensitivity of -47dB ±4dB at 94dB SPL. The device operates within a voltage range of 1.5 V to 10 V and draws a supply current of 500 µA. Its frequency response spans from 100 Hz to 12 kHz. The component utilizes solder pads for termination and has a circular dimension of 0.382 inches (9.70 mm) in diameter.

Feature Summary

• Unidirectional acoustic design for focused sound capture
• Electret condenser transducer technology
• Direct solder pad termination for PCB integration

Applications

• Analog audio signal acquisition
• Voice recording devices
• Communication equipment microphones

Procurement Notes

Verify the specific datasheet version provided by Panasonic Electronic Components or authorized distributors to confirm exact electrical tolerances and mechanical drawings. Ensure compatibility with the target circuit's biasing requirements, specifically the 1.5 V to 10 V operating range and 500 µA current consumption. Confirm that the solder pad termination method aligns with the assembly process.

Selection Notes

Select this component when a compact, unidirectional electret condenser microphone is required for analog applications. The 9.70 mm diameter suits space-constrained designs. Verify that the -47dB sensitivity meets the system's noise floor requirements. Ensure the operating voltage range fits the available power supply rails.

Part Context

This part belongs to the Panasonic WM series of microphones. It is designed as a general-purpose analog microphone cartridge. The unit integrates the electret capsule and preamplifier into a single package suitable for surface mount or through-hole soldering depending on the board layout.

Replacement Considerations

No public confirmed substitute part numbers are available in the source data.