BK-28562-000

Overview

The Knowles BK-28562-000 is a subminiature balanced armature receiver speaker designed for high-efficiency audio applications. It features a rectangular form factor with side porting and operates within a frequency range of 200 Hz to 5.5 kHz. The device has an impedance of 35 Ohms and delivers a sound pressure level of 123 dBA. Physical dimensions include a length of 7.87 mm (0.31 in) and a width of 5.59 mm, utilizing solder pad termination for board mount installation.

Feature Summary

• Balanced armature technology providing high efficiency and stability
• Subminiature rectangular design with side port configuration
• High sound pressure output capability

Applications

• Hearing aids
• Medical devices
• Smart wearables

Procurement Notes

Verify the specific datasheet version from Knowles Acoustics to confirm mechanical tolerances and acoustic performance curves. Ensure compatibility with existing PCB footprints regarding the 5.59 mm width and 7.87 mm length. Confirm that the 35 Ohm impedance aligns with the target driver circuit requirements for optimal power transfer and sound quality.

Selection Notes

Select this component when space constraints require a subminiature form factor alongside high acoustic output. The balanced armature architecture offers superior stability compared to dynamic drivers in small packages. Consider the 200 Hz to 5.5 kHz frequency response to ensure it covers the necessary vocal range for the intended application without excessive external filtering.

Part Context

This model belongs to the Knowles Acoustics subminiature speaker family, which utilizes proprietary magnetic technology for reliability. These components are engineered for portable electronics where size and weight are critical. The product line emphasizes consistency in manufacturing to meet the stringent demands of medical and consumer audio markets.

Replacement Considerations

Consult official substitution guides for equivalent balanced armature receivers with matching impedance and sensitivity. Verify dimensional compatibility before replacing to ensure proper fit within the enclosure.

FAQ

What is the operating frequency range of the BK-28562-000?

The device operates effectively between 200 Hz and 5.5 kHz.

How is the BK-28562-000 terminated?

It uses solder pads for surface mount board installation.