PartsTable
Technical Data Sheet
PartsTable / MRO / C4491
C4491 ✓ 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,MICA DIELECTRIC. Key specifications include material: PLASTIC CASE, body_style: W/THD MTG HOLE(S)/STUD(S) TERMINAL(S) ON ONE SURFACE, body_width: 1.400 INCHES MAXIMUM IN, body_height: 2.500 INCHES MAXIMUM IN, body_length: 1.780 INCHES MAXIMUM IN, rating_method: ELECTRICAL SINGLE COMPONENT SINGLE WINDING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-01-104-7458, 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→ C4491
NSN: 5950-01-104-7458
FSC: 5950
CAGE: 60767 — SIGMA ELECTRONICS, INC. (USA)
SPECIFICATIONS
materialPLASTIC CASE
body_styleW/THD MTG HOLE(S)/STUD(S) TERMINAL(S) ON ONE SURFACE
body_width1.400 INCHES MAXIMUM IN
body_height2.500 INCHES MAXIMUM IN
body_length1.780 INCHES MAXIMUM IN
rating_methodELECTRICAL SINGLE COMPONENT SINGLE WINDING
inclosure_typeHERMETICALLY SEALED
inductance_typeMECHANICALLY ADJUSTABLE
mounting_methodTHREADED HOLE(S) SINGLE GROUP
special_featuresINTERNALLY SHIELDED AND BROUGHT OUT TO TERMINAL
winding_quantity1 SINGLE COMPONENT
inductance_rating13.00 MICROHENRIES MINIMUM AND 188.00 MICROHENRIES MAXIMUM SINGLE COMPONENT SINGLE WINDING
NSN5950-01-104-7458
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,MICA DIELECTRIC TITLE COMPONENT PN C4491 MFR CAPACITOR,FIXED,MICA D
KEY FEATURES
•
WINDING QUANTITY: 1 SINGLE COMPONENT
•
INDUCTANCE TYPE: MECHANICALLY ADJUSTABLE
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH: 0.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
•
WINDING OPERATING CURRENT: 1.0 AMPERES DC MINIMUM AND 30.0 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH: 1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
•
RELIABILITY INDICATOR: NOT ESTABLISHED
•
MOUNTING FACILITY QUANTITY: 4 SINGLE GROUP
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)
WINDING QUANTITY1 SINGLE COMPONENT
INDUCTANCE TYPEMECHANICALLY ADJUSTABLE
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH0.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
WINDING OPERATING CURRENT1.0 AMPERES DC MINIMUM AND 30.0 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
RELIABILITY INDICATORNOT ESTABLISHED
SPECIAL FEATURESINTERNALLY SHIELDED AND BROUGHT OUT TO TERMINAL
MOUNTING FACILITY QUANTITY4 SINGLE GROUP
INDUCTANCE RATING13.00 MICROHENRIES MINIMUM AND 188.00 MICROHENRIES MAXIMUM SINGLE COMPONENT SINGLE WINDING
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
52852Interchangeable
interchangeable cross-reference
interchangeable
18084Interchangeable
interchangeable cross-reference
interchangeable
24-P08062T001Interchangeable
interchangeable cross-reference
interchangeable
872259-1Interchangeable
interchangeable cross-reference
interchangeable
ZP353C100Interchangeable
interchangeable cross-reference
interchangeable
C-4491Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C4491?
C4491 is a CAPACITOR,FIXED,MICA DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace C4491?
There are 13 known substitutes for C4491: 52852, 18084, 24-P08062T001 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C4491?
C4491 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-01-104-7458. 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