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Technical Data Sheet
PartsTable / MRO / CM70B331J
CM70B331J ✓ 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/MTG TABS/FLANGES, TERMINAL(S) ON ONE SURFACE, body_width: 1.266 INCHES NOMINAL IN, body_height: 2.250 INCHES NOMINAL IN, body_length: 2.281 INCHES NOMINAL IN, terminal_length: 0.469 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 5910-00-018-8778, 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→ CM70B331J
NSN: 5910-00-018-8778
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/MTG TABS/FLANGES, TERMINAL(S) ON ONE SURFACE
body_width1.266 INCHES NOMINAL IN
body_height2.250 INCHES NOMINAL IN
body_length2.281 INCHES NOMINAL IN
terminal_length0.469 INCHES NOMINAL IN
terminal_diameter0.190 INCHES NOMINAL IN
reliability_indicatorNOT ESTABLISHED
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
terminal_type_and_quantity2 THREADED STUD
specification/standard_data81349-MIL-C-5/12 GOVERNMENT SPECIFICATION
tolerance_range_per_section-5.00 TO 5.00 PERCENT SINGLE SECTION
NSN5910-00-018-8778
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,MICA DIELECTRIC TITLE COMPONENT PN CM70B331J MFR CAPACITOR,FIXED,MICA D
KEY FEATURES
•
UNTHREADED MOUNTING HOLE DIAMETER: 0.200 INCHES NOMINAL IN
•
DISSIPATION FACTOR AT REFERENCE TEMP IN PERCENT: 0.0007
•
MOUNTING FACILITY TYPE AND QUANTITY: 2 UNTHREADED MOUNTING HOLES
•
SPECIFICATION/STANDARD DATA: 81349-MIL-C-5/12 GOVERNMENT SPECIFICATION
•
BODY HEIGHT: 1.780 INCHES NOMINAL IN
•
NONDERATED OPERATING TEMP: -55.0 CELSIUS MINIMUM AND 70.0 CELSIUS MAXIMUM DEGC
•
MAXIMUM RF CURRENT RATING AT HIGHEST RATED FREQUENCY IN RMS AMPS: 4.3
•
SCHEMATIC DIAGRAM DESIGNATOR: NO COMMON OR GROUNDED ELECTRODE(S)
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)
UNTHREADED MOUNTING HOLE DIAMETER0.200 INCHES NOMINAL IN
DISSIPATION FACTOR AT REFERENCE TEMP IN PERCENT0.0007
MOUNTING FACILITY TYPE AND QUANTITY2 UNTHREADED MOUNTING HOLES
SPECIFICATION/STANDARD DATA81349-MIL-C-5/12 GOVERNMENT SPECIFICATION
BODY HEIGHT1.780 INCHES NOMINAL IN
NONDERATED OPERATING TEMP-55.0 CELSIUS MINIMUM AND 70.0 CELSIUS MAXIMUM DEGC
MAXIMUM RF CURRENT RATING AT HIGHEST RATED FREQUENCY IN RMS AMPS4.3
SCHEMATIC DIAGRAM DESIGNATORNO COMMON OR GROUNDED ELECTRODE(S)
INSULATION RESISTANCE AT MAXIMUM OPERATING TEMP2000.0 MEGOHMS
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY LENGTH2.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
MILC5-12Interchangeable
interchangeable cross-reference
interchangeable
CM70B331JInterchangeable
interchangeable cross-reference
interchangeable
CM70FN331GM1Interchangeable
Same NIIN cross-reference
interchangeable
F250B331JMInterchangeable
Same NIIN cross-reference
interchangeable
MIL-C-5/12Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CM70B331J?
CM70B331J is a CAPACITOR,FIXED,MICA DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace CM70B331J?
There are 5 known substitutes for CM70B331J: MILC5-12, CM70B331J, CM70FN331GM1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CM70B331J?
CM70B331J is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-018-8778. 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