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U891R — MICROPHONE,CAPACITOR

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

U891R: MICROPHONE,CAPACITOR.

The MICROPHONE,CAPACITOR is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include width: 3.310 INCHES MAXIMUM IN, height: 0.910 INCHES NOMINAL IN, length: 4.250 INCHES NOMINAL IN, impedance_rating: 200.0 OHMS NOMINAL, special_features: CARDIOD CONDENSER BOUNDARY MICROPONE WITH SWITCH, polarity_connection: REQUIRED. This part is cataloged in the U.S.

Government catalog under NSN 5965-01-554-6959, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
U891R
NSN: 5965-01-554-6959
FSC: 5965 — Headsets, Handsets, Microphones and Speakers
CAGE: 47822 — AUDIO-TECHNICA U.S., INC. (USA)
SPECIFICATIONS
width3.310 INCHES MAXIMUM IN
height0.910 INCHES NOMINAL IN
length4.250 INCHES NOMINAL IN
impedance_rating200.0 OHMS NOMINAL
special_featuresCARDIOD CONDENSER BOUNDARY MICROPONE WITH SWITCH
polarity_connectionREQUIRED
frequency_response_range_in_hertz+30.0 TO 20000.0
NSN5965-01-554-6959
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MICROPHONE,CAPACITOR TITLE COMPONENT PN U891R MFR MICROPHONE,CAPACITOR
KEY FEATURES
•
LENGTH: 4.250 INCHES NOMINAL IN
•
FREQUENCY RESPONSE RANGE IN HERTZ: +30.0 TO 20000.0
•
POLARITY CONNECTION: REQUIRED
•
HEIGHT: 0.910 INCHES NOMINAL IN
•
IMPEDANCE RATING: 200.0 OHMS NOMINAL
•
WIDTH: 3.310 INCHES MAXIMUM IN
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS
LENGTH4.250 INCHES NOMINAL IN
FREQUENCY RESPONSE RANGE IN HERTZ+30.0 TO 20000.0
POLARITY CONNECTIONREQUIRED
HEIGHT0.910 INCHES NOMINAL IN
IMPEDANCE RATING200.0 OHMS NOMINAL
SPECIAL FEATURESCARDIOD CONDENSER BOUNDARY MICROPONE WITH SWITCH
WIDTH3.310 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5965 — Headsets, Handsets, Microphones and Speakers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5965-00-001-1492 5965-00-001-7591 5965-00-001-7592 5965-00-001-7593 5965-00-003-2686 5965-00-003-2690 5965-00-003-4754 5965-00-004-5510
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is U891R?
U891R is a MICROPHONE,CAPACITOR.
What is the NSN for U891R?
U891R is cataloged in the U.S. Government catalog under NSN 5965-01-554-6959. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.