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Technical Data Sheet
PartsTable / MRO / MILC19978-9
MILC19978-9 ✓ 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 material: PLASTIC CASE, body_style: W/O MTG FACILITIES, AXIAL TERMINALS, body_length: 1.375 INCHES NOMINAL IN, body_diameter: 0.400 INCHES NOMINAL IN, terminal_length: 1.625 INCHES NOMINAL IN, features_provided: HERMETICALLY SEALED CASE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-433-1402, 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→ MILC19978-9
NSN: 5910-00-433-1402
FSC: 5910
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC CASE
body_styleW/O MTG FACILITIES, AXIAL TERMINALS
body_length1.375 INCHES NOMINAL IN
body_diameter0.400 INCHES NOMINAL IN
terminal_length1.625 INCHES NOMINAL IN
features_providedHERMETICALLY SEALED CASE
terminal_diameter0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
dielectric_materialPLASTIC
reliability_indicatorESTABLISHED
end_item_identification1270-01-142-2855 TARGET DESIGNATOR
case_insulation_materialPLASTIC
nonderated_operating_temp-65.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
NSN5910-00-433-1402
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,PLASTIC DIELECTR TITLE COMPONENT PN MILC19978-9 MFR CAPACITOR,FIXED,PLASTI
KEY FEATURES
•
TEST DATA DOCUMENT: 81349-MIL-C-19978 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
FEATURES PROVIDED: HERMETICALLY SEALED CASE
•
NONDERATED OPERATING TEMP: -65.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
•
TOLERANCE RANGE PER SECTION: -5.00 TO 5.00 PERCENT SINGLE SECTION
•
DIELECTRIC MATERIAL: PAPER AND PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER)
•
CASE INSULATION MATERIAL: PLASTIC
•
DISSIPATION FACTOR AT REFERENCE TEMP IN PERCENT: 1.0000
•
BODY DIAMETER: 0.462 INCHES MAXIMUM 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)
TEST DATA DOCUMENT81349-MIL-C-19978 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
FEATURES PROVIDEDHERMETICALLY SEALED CASE
NONDERATED OPERATING TEMP-65.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
TOLERANCE RANGE PER SECTION-5.00 TO 5.00 PERCENT SINGLE SECTION
DIELECTRIC MATERIALPAPER AND PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER)
CASE INSULATION MATERIALPLASTIC
DISSIPATION FACTOR AT REFERENCE TEMP IN PERCENT1.0000
BODY DIAMETER0.462 INCHES MAXIMUM IN
SCHEMATIC DIAGRAM DESIGNATORNO COMMON OR GROUNDED ELECTRODE(S)
BODY LENGTH1.437 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 1
CQR09A1KF473J3MInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILC19978-9?
MILC19978-9 is a CAPACITOR,FIXED,PLASTIC DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace MILC19978-9?
There is 1 known substitute for MILC19978-9: CQR09A1KF473J3M. Substitute compatibility should be verified for your specific system.
What is the NSN for MILC19978-9?
MILC19978-9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-433-1402. 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.
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Last verified: July 2026