WM-54BT

Overview

The WM-54BT is an omnidirectional electret condenser microphone cartridge manufactured by Panasonic Electronic Components. It operates within a voltage range of 2.5 V to 10 V and features a frequency response spanning from 20 Hz to 16 kHz. The device delivers a sensitivity of -44 dB ±3 dB at 94 dB SPL, with a signal-to-noise ratio of 62 dBA. Its physical dimensions are characterized by a diameter of 0.382 inches (approximately 9.7 mm), utilizing PC pin termination for circuit board mounting.

Feature Summary

• Omnidirectional acoustic design for uniform sound capture
• Electret condenser technology for analog audio conversion
• Low-voltage operational capability suitable for portable devices

Applications

• Portable electronic equipment requiring compact audio input
• Consumer electronics with limited power supply constraints
• General-purpose voice recording applications

Procurement Notes

Verify the specific suffix designation against official Panasonic documentation to confirm exact sensitivity tolerances and impedance characteristics. Ensure compatibility with existing PCB footprints regarding PC pin spacing. Confirm RoHS compliance status through current manufacturer declarations prior to integration into regulated product lines.

Selection Notes

Select this component when an omnidirectional pickup pattern is required for general voice capture rather than directional isolation. Consider the low-voltage operation range if the host system utilizes battery power or low-voltage logic interfaces. Evaluate the mechanical size constraints against available space on the target printed circuit board assembly.

Part Context

This microphone belongs to the WM-54B series, which includes variants such as the WM-52B designed for 1.5 V operation. The series represents high-cost-performance electret condenser cartridges intended for mass-market consumer electronics where reliable analog audio performance is prioritized alongside compact form factors.

Replacement Considerations

Cross-reference with other Panasonic WM-series microphones for dimensional compatibility. Verify that alternative models maintain similar sensitivity levels and voltage requirements to ensure seamless functional substitution without circuit redesign.

FAQ

What is the directivity pattern of the WM-54BT?

The WM-54BT features an omnidirectional polar pattern, allowing it to capture sound equally from all directions.

What is the operating voltage range for this microphone?

The device requires a DC bias voltage between 2.5 V and 10 V for proper operation.