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Technical Data Sheet
PartsTable / MRO / 40C91
40C91 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

CAPACITOR,FIXED,CERAMIC DIELECTR. Key specifications include color: WHITE SECOND TEMP COEFFICIENT, material: CERAMIC CASE, body_style: W/O MTG FACILITIES, RADIAL TERMINALS, body_length: 0.120 INCHES NOMINAL IN, shaft_length: 0.438 INCHES NOMINAL IN, body_diameter: 0.280 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6680-00-542-1183, 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
MRO→ MRO_GENERAL→ 40C91
NSN: 6680-00-542-1183
FSC: 6680
CAGE: 92400 — TELEX COMPUTER PRODUCTS INC (USA)
SPECIFICATIONS
colorWHITE SECOND TEMP COEFFICIENT
materialCERAMIC CASE
body_styleW/O MTG FACILITIES, RADIAL TERMINALS
body_length0.120 INCHES NOMINAL IN
shaft_length0.438 INCHES NOMINAL IN
body_diameter0.280 INCHES NOMINAL IN
figure_heightUNABLE TO DECODE
overall_width1.031 INCHES NOMINAL IN
overall_height1.000 INCHES NOMINAL IN
overall_length1.751 INCHES NOMINAL IN
shaft_diameter0.200 INCHES NOMINAL IN
terminal_length1.250 INCHES MINIMUM IN
NSN6680-00-542-1183
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,CERAMIC DIELECTR TITLE COMPONENT PN 40C91 MFR CAPACITOR,FIXED,CERAMI
KEY FEATURES
•
LONGEST VERTICAL DISTANCE BETWEEN MOUNTING CENTERS: 0.625 INCHES NOMINAL IN
•
SHAFT ROTATION DIRECTION AND MAXIMUM SPEED IN RPM: UNABLE TO DECODE
•
MOUNTING TYPE FOR WHICH DESIGNED: UNABLE TO DECODE
•
COLOR: BLACK THIRD TEMP COEFFICIENT
•
NUMERAL DISPLAY METHOD: DRUM
•
STYLE DESIGNATOR: SQUARE/RECTANGULAR CASED
•
SHAFT LENGTH: 0.438 INCHES NOMINAL 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 (FLIS)
LONGEST VERTICAL DISTANCE BETWEEN MOUNTING CENTERS0.625 INCHES NOMINAL IN
SHAFT ROTATION DIRECTION AND MAXIMUM SPEED IN RPMUNABLE TO DECODE
OVERALL HEIGHT1.000 INCHES NOMINAL IN
MOUNTING TYPE FOR WHICH DESIGNEDUNABLE TO DECODE
COLORBLACK THIRD TEMP COEFFICIENT
NUMERAL DISPLAY METHODDRUM
STYLE DESIGNATORSQUARE/RECTANGULAR CASED
SHAFT LENGTH0.438 INCHES NOMINAL IN
SHAFT DIAMETER0.200 INCHES NOMINAL IN
MOUNTING FACILITY TYPE AND QUANTITY2 THREADED HOLE(S)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
42AW49Interchangeable
interchangeable cross-reference
interchangeable
SC-C-599081Interchangeable
interchangeable cross-reference
interchangeable
40A-9Interchangeable
interchangeable cross-reference
interchangeable
AB0690155A566Interchangeable
interchangeable cross-reference
interchangeable
69-155A566Interchangeable
interchangeable cross-reference
interchangeable
155-566Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40C91?
40C91 is a CAPACITOR,FIXED,CERAMIC DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace 40C91?
There are 18 known substitutes for 40C91: 42AW49, SC-C-599081, 40A-9 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40C91?
40C91 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6680-00-542-1183. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026