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PartsTable / COMPONENT / A634-4
A634-4 ✓ Verified by PartsTable
— · COMPONENT
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 material: OIL LUBRICATING LUBRICATION, body_width: 1.060 INCHES NOMINAL IN, body_height: 1.340 INCHES NOMINAL IN, body_length: 1.400 INCHES NOMINAL IN, corner_shape: SQUARE ALL CORNERS, inclosure_type: HERMETICALLY SEALED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-648-4512, 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
A634-4
NSN: 5950-00-648-4512
FSC: 5950
CAGE: 05584 — AUTODYNE MANUFACTURING CO INC (USA)
SPECIFICATIONS
materialOIL LUBRICATING LUBRICATION
body_width1.060 INCHES NOMINAL IN
body_height1.340 INCHES NOMINAL IN
body_length1.400 INCHES NOMINAL IN
corner_shapeSQUARE ALL CORNERS
inclosure_typeHERMETICALLY SEALED
overall_length0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 70.0 ROCKWELL C MAXIMUM OVERALL
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
nominal_thread_size0.112 INCHES SINGLE GROUP IN
NSN5950-00-648-4512
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,CERAMIC DIELECTR TITLE COMPONENT PN A634-4 MFR CAPACITOR,FIXED,CERAMI
KEY FEATURES
•
FREQUENCY RATING: 400.0 HERTZ NOMINAL SINGLE COMPONENT
•
RELIABILITY INDICATOR: NOT ESTABLISHED
•
WINDING FUNCTION AND QUANTITY: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
•
BODY WIDTH: 1.060 INCHES NOMINAL IN
•
MOUNTING FACILITY QUANTITY: 4 SINGLE GROUP
•
INCLOSURE TYPE: HERMETICALLY SEALED
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
•
BODY LENGTH: 1.400 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)
FREQUENCY RATING400.0 HERTZ NOMINAL SINGLE COMPONENT
RELIABILITY INDICATORNOT ESTABLISHED
WINDING FUNCTION AND QUANTITY1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
BODY WIDTH1.060 INCHES NOMINAL IN
MOUNTING FACILITY QUANTITY4 SINGLE GROUP
INCLOSURE TYPEHERMETICALLY SEALED
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
BODY LENGTH1.400 INCHES NOMINAL IN
WINDING OPERATING CURRENT200.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
TERMINAL TYPE AND QUANTITY5 WIRE HOOK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
24992Interchangeable
interchangeable cross-reference
interchangeable
A607-1Interchangeable
interchangeable cross-reference
interchangeable
355PC9Interchangeable
interchangeable cross-reference
interchangeable
BA3980Interchangeable
interchangeable cross-reference
interchangeable
C474-1Interchangeable
interchangeable cross-reference
interchangeable
40182Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A634-4?
A634-4 is a CAPACITOR,FIXED,CERAMIC DIELECTR.
What parts can replace A634-4?
There are 8 known substitutes for A634-4: 24992, A607-1, 355PC9 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A634-4?
A634-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-648-4512. 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