CI-30120-A42

Overview

The Knowles CI-30120-A42 is a balanced armature receiver designed for hearing instrument applications. It operates within a frequency range of 200 Hz to 4.6 kHz and features an impedance of 41 Ohms. The component utilizes magnetic technology and offers output levels ranging from 105 dB to 132 dB SPL at 500 Hz with 5% THD. It employs proprietary technologies including Pantograph, Ferrofluid, and D-Amp for enhanced performance.

Feature Summary

• Balanced armature design optimized for hearing instruments
• Utilizes Pantograph, Ferrofluid, and D-Amp technologies
• High output sound pressure level capability

Applications

• Hearing aids
• Cochlear implants
• Personal listening devices

Procurement Notes

Verify the specific datasheet version and mechanical outline drawing before integration. Confirm that the 41 Ohm impedance matches the driver circuit requirements. Ensure the solder pad termination style is compatible with the PCB layout. Validate that the acoustic output specifications meet the target application's sensitivity needs.

Selection Notes

Select this component when high fidelity audio reproduction in a miniature form factor is required for hearing assistance devices. The balanced armature architecture provides efficient power consumption and precise acoustic tuning. Consider the specific impedance and frequency response characteristics against the amplifier capabilities of the host device.

Part Context

This part belongs to Knowles' portfolio of precision acoustic transducers. It is engineered specifically for the demanding environment of hearing instruments where size, weight, and acoustic performance are critical constraints. The use of advanced materials ensures reliability and consistent performance over the device's lifespan.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify compatibility with existing acoustic chambers and mounting structures if considering alternative components.