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Technical Data Sheet
PartsTable / MRO / MILC19978-1
MILC19978-1 ✓ 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/O MTG FACILITIES, AXIAL TERMINALS, body_length: 0.675 INCHES NOMINAL IN, body_diameter: 0.322 INCHES NOMINAL IN, terminal_length: 1.625 INCHES MINIMUM AND 1.725 INCHES MAXIMUM IN, features_provided: HERMETICALLY SEALED CASE, terminal_diameter: 0.025 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 5910-00-006-1329, 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→ MILC19978-1
NSN: 5910-00-006-1329
FSC: 5910
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
body_styleW/O MTG FACILITIES, AXIAL TERMINALS
body_length0.675 INCHES NOMINAL IN
body_diameter0.322 INCHES NOMINAL IN
terminal_length1.625 INCHES MINIMUM AND 1.725 INCHES MAXIMUM IN
special_featuresMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS.
features_providedHERMETICALLY SEALED CASE
terminal_diameter0.025 INCHES NOMINAL IN
dielectric_materialPAPER AND PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER)
nominal_thread_size0.438 INCHES IN
reliability_indicatorESTABLISHED
end_item_identification5805-01-138-2751 FREQUENCY CONVE
case_insulation_materialPLASTIC
NSN5910-00-006-1329
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,PLASTIC DIELECTR TITLE COMPONENT PN MILC19978-1 MFR CAPACITOR,FIXED,PLASTI
KEY FEATURES
•
RELIABILITY INDICATOR: NOT ESTABLISHED
•
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION: 400.0 DC SINGLE SECTION
•
SCHEMATIC DIAGRAM DESIGNATOR: ELECTRODE(S) GROUNDED TO CASE, W/GND TERMINAL
•
INSULATION RESISTANCE AT REFERENCE TEMP: 25000.0 MEGOHMS
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
SPECIFICATION/STANDARD DATA: 81349-MIL-C-19978/1 GOVERNMENT SPECIFICATION
•
BODY LENGTH: 1.625 INCHES NOMINAL IN
•
TERMINAL LENGTH: 1.625 INCHES MINIMUM 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)
RELIABILITY INDICATORNOT ESTABLISHED
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION400.0 DC SINGLE SECTION
SCHEMATIC DIAGRAM DESIGNATORELECTRODE(S) GROUNDED TO CASE, W/GND TERMINAL
INSULATION RESISTANCE AT REFERENCE TEMP25000.0 MEGOHMS
NOMINAL THREAD SIZE0.312 INCHES IN
SPECIFICATION/STANDARD DATA81349-MIL-C-19978/1 GOVERNMENT SPECIFICATION
BODY LENGTH1.625 INCHES NOMINAL IN
TERMINAL LENGTH1.625 INCHES MINIMUM IN
TERMINAL TYPE AND QUANTITY2 UNINSULATED WIRE LEAD
INSULATION RESISTANCE AT MAXIMUM OPERATING TEMP20.0 MEGOHM-MICROFARADS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
CQ13A1KE224J3Interchangeable
Same NIIN cross-reference
interchangeable
MIL-PRF-19978/1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILC19978-1?
MILC19978-1 is a CAPACITOR,FIXED,PLASTIC DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace MILC19978-1?
There are 2 known substitutes for MILC19978-1: CQ13A1KE224J3, MIL-PRF-19978/1. Substitute compatibility should be verified for your specific system.
What is the NSN for MILC19978-1?
MILC19978-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-006-1329. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026