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Technical Data Sheet
PartsTable / MRO / C-644
C-644 ✓ 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,PLASTIC DIELECTR. Key specifications include body_style: W/MTG TABS/FLANGES, TERMINAL(S) ON ONE SURFACE, body_width: 2.156 INCHES NOMINAL IN, body_height: 0.781 INCHES NOMINAL IN, body_length: 2.781 INCHES NOMINAL IN, outside_shape: ROUND, overall_length: 2.688 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 3010-00-640-4912, 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→ C-644
NSN: 3010-00-640-4912
FSC: 3010
CAGE: 83529 — LOVEJOY, LLC DIV LOVEJOY (USA)
SPECIFICATIONS
body_styleW/MTG TABS/FLANGES, TERMINAL(S) ON ONE SURFACE
body_width2.156 INCHES NOMINAL IN
body_height0.781 INCHES NOMINAL IN
body_length2.781 INCHES NOMINAL IN
outside_shapeROUND
overall_length2.688 INCHES NOMINAL IN
outside_diameter0.750 INCHES NOMINAL IN
section_quantity2
special_featuresCONNECTION END TYPE, BOTH ENDS: HUB
features_providedHERMETICALLY SEALED CASE
dielectric_materialPLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER)
reliability_indicatorNOT ESTABLISHED
NSN3010-00-640-4912
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,PLASTIC DIELECTR TITLE COMPONENT PN C-644 MFR CAPACITOR,FIXED,PLASTI
KEY FEATURES
•
LENGTH FROM UNIVERSAL JOINT SPIDER CENTERLINE TO HUB END: 1.344 INCHES NOMINAL IN
•
OUTSIDE SHAPE: ROUND
•
OUTSIDE DIAMETER: 0.750 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)
LENGTH FROM UNIVERSAL JOINT SPIDER CENTERLINE TO HUB END1.344 INCHES NOMINAL IN
OVERALL LENGTH2.688 INCHES NOMINAL IN
OUTSIDE SHAPEROUND
SPECIAL FEATURESCONNECTION END TYPE, BOTH ENDS: HUB
OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
D4ANG25Interchangeable
interchangeable cross-reference
interchangeable
D4Interchangeable
interchangeable cross-reference
interchangeable
MILT12229Interchangeable
interchangeable cross-reference
interchangeable
730D1Interchangeable
interchangeable cross-reference
interchangeable
BS965PC12Interchangeable
interchangeable cross-reference
interchangeable
DD356S58-024PC10Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C-644?
C-644 is a CAPACITOR,FIXED,PLASTIC DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace C-644?
There are 15 known substitutes for C-644: D4ANG25, D4, MILT12229 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C-644?
C-644 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3010-00-640-4912. 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