SR6438NWS-003

Overview

The Knowles SR6438NWS-003 is a magnetic balanced armature receiver designed for audio applications. It features a round shape with a diameter of 6.4 mm and a depth of 4 mm. The component operates within a frequency range of 200 Hz to 9.4 kHz, with a resonant frequency of 1.264 kHz. It delivers a sound pressure level of 109.5 dBA at an impedance of 55.5 Ohms. Installation is via solder pads in a panel mount style. The unit weighs 1.732 g and functions between 0°C and +63°C.

Feature Summary

• Magnetic balanced armature transducer technology
• Optimized acoustic performance for earphone use
• Compact round form factor for space-constrained designs

Applications

• Earphones
• Hearing aids
• Medical audio devices

Procurement Notes

Verify the specific suffix against official Knowles documentation to confirm exact acoustic tuning and mechanical tolerances. Ensure compatibility with existing enclosure designs regarding the 6.4 mm diameter and 4 mm depth constraints. Confirm that the operating temperature range meets the final product requirements.

Selection Notes

Select this component when high sensitivity and compact size are required for wearable audio. The balanced armature design offers efficient power consumption compared to dynamic drivers. Verify that the 55.5 Ohm impedance matches the amplifier output capabilities of the target system.

Part Context

This part belongs to the SR series of receivers from Knowles. The series is known for providing precise audio reproduction in small packages. The SR6438NWS-003 shares the same physical dimensions as the SR6438NWS-000 but may have different acoustic characteristics.

Replacement Considerations

The SR6438NWS-000 is a related model in the same series with identical dimensions. Verify if the acoustic tuning differences between the -000 and -003 variants affect the specific application requirements before substitution.