EM-24446-C57

Microphones Overview

The Knowles EM-24446-C57 is an omnidirectional electret condenser microphone designed for surface-mount technology (SMD/SMT) applications. It operates at a supply voltage of 1.3 V with a rated current of 50 uA. The device features a sensitivity of -56.5 dB ±3 dB referenced to 1 V/Pa at 74 dB SPL and an impedance of 4.4 kOhms. Its frequency response spans from 100 Hz to 10 kHz. The physical dimensions are 3.57 mm in length, 3.57 mm in width, and 2.21 mm in depth, housed in a compact bulk package.

Microphones Feature Summary

• Omnidirectional acoustic design for uniform sound capture
• Electret condenser transducer technology
• Surface-mount solder pad termination

Microphones Applications

• Voice recognition systems
• Mobile communication devices
• Portable audio recording equipment

Microphones Procurement Notes

Verify the specific suffix code against official Knowles documentation to confirm exact sensitivity tolerance and frequency response characteristics. Ensure compatibility with SMD assembly processes regarding thermal profiles. Confirm RoHS compliance status through the latest manufacturer datasheet before integration into regulated products.

Microphones Selection Notes

Select this component when a low-profile, omnidirectional microphone is required for space-constrained portable electronics. The 1.3 V operating voltage suits battery-powered designs. Verify that the 4.4 kOhm impedance matches the input requirements of the connected preamplifier or audio processing circuit.

Microphones Part Context

This model belongs to the Knowles EM/BEM series of microphones. These components are engineered for high reliability in consumer electronics. The series utilizes standard electret condenser principles adapted for modern surface-mount manufacturing techniques.

Microphones Replacement Considerations

Cross-reference part numbers such as EM-24446-C36 or EM-23346-C54 for potential substitutes. Verify that alternative models match the required sensitivity, impedance, and physical footprint specifications.