FH-26664-000 Equivalent & Substitute Parts

Part Overview

The FH-26664-000 is a 790 Ohms balanced armature receiver manufactured by Knowles, designed for top-port applications with a frequency range of 200 Hz to 6.3 kHz and 100.5 dB sensitivity. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design requirements and production continuity. The rectangular form factor (5.09mm × 2.80mm) and solder pad termination are standard for this receiver category.

Substiute Parts

FH-26664-000

KnowlesIn Stock: 1106FH-26664-000 Datasheet

Current PartRFQ

FC-26170-000

KnowlesIn Stock: 688FC-26170-000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FH-26664-000 is determined by the following critical parameters:

• Impedance compatibility: Substitute parts must operate within acceptable impedance ranges for the circuit design (790 Ohms baseline)
• Frequency response: The 200 Hz lower limit must be maintained; upper frequency limits may vary within application tolerance
• Port location: Top-port configuration is required for mechanical fit
• Form factor: Rectangular shape with compatible dimensions ensures PCB layout compatibility
• Termination type: Solder pad termination is mandatory for assembly process compatibility
• Technology type: Balanced armature magnetic receiver technology must be preserved

The FC-26170-000 qualifies as a substitute based on these parameters, with documented variations in impedance (845 Ohms), efficiency (104.00 dB), and frequency upper limit (5.8 kHz).

Parameter Comparison

Engineering Selection Recommendations

The FC-26170-000 is available as an active product with documented ROHS3 compliance and REACH unaffected status, providing regulatory continuity for new designs and production. The impedance increase of 55 Ohms and efficiency gain of 4.6 dB represent measurable performance improvements. The frequency upper limit reduction from 6.3 kHz to 5.8 kHz must be evaluated against application requirements. Dimensional increases (0.09mm length, 0.75mm width, 0.41mm height) require PCB layout verification to confirm mechanical compatibility. The MSL rating of 1 (Unlimited) for FC-26170-000 provides superior moisture handling compared to the obsolete FH-26664-000.

Frequently Asked Questions (FAQ)

Q: Can FC-26170-000 be used as a direct replacement for FH-26664-000?

A: FC-26170-000 meets the core substitution criteria: identical manufacturer (Knowles), matching technology (balanced armature magnetic receiver), compatible port location (top), matching shape (rectangular), and identical termination (solder pads). Impedance, efficiency, and frequency response variations must be evaluated within your specific circuit design parameters.

Q: What are the dimensional compatibility considerations?

A: FC-26170-000 is slightly larger: 5.18mm × 4.65mm versus 5.09mm × 2.80mm, with 0.41mm additional height. PCB layout and mechanical clearance must be verified before implementation.

Q: How do impedance differences affect circuit performance?

A: The 55 Ohm impedance increase (790 Ohms to 845 Ohms) will affect circuit impedance matching and signal levels. Circuit simulation or testing is necessary to determine acceptability for your application.

Q: What is the significance of the frequency range reduction?

A: FC-26170-000 operates to 5.8 kHz versus 6.3 kHz for FH-26664-000. Applications requiring response above 5.8 kHz must evaluate whether this reduction impacts performance specifications.

Q: Are there compliance advantages to using FC-26170-000?

A: FC-26170-000 carries ROHS3 compliance and REACH unaffected status with documented MSL rating of 1 (Unlimited), providing regulatory alignment for current manufacturing standards.

Q: What does the 4.6 dB efficiency increase mean?

A: FC-26170-000 delivers 104.00 dB sensitivity versus 100.50 dB for FH-26664-000. This represents increased acoustic output at equivalent input levels.