PartsTable
Technical Data Sheet
PartsTable / MRO / C121-9
C121-9 ✓ 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,MICA DIELECTRIC. Key specifications include material: STEEL OVERALL, body_style: W/O MTG FACILITIES TERMINAL(S) ON ONE SURFACE, body_width: 0.280 INCHES MAXIMUM IN, body_height: 0.130 INCHES MAXIMUM IN, body_length: 0.430 INCHES MAXIMUM IN, terminal_length: 1.250 INCHES MINIMUM 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 5910-00-008-4422, 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→ C121-9
NSN: 5910-00-008-4422
FSC: 5910
CAGE: 06811 — EMCORE CORPORATION DIV CONCORD DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
body_styleW/O MTG FACILITIES TERMINAL(S) ON ONE SURFACE
body_width0.280 INCHES MAXIMUM IN
body_height0.130 INCHES MAXIMUM IN
body_length0.430 INCHES MAXIMUM IN
terminal_length1.250 INCHES MINIMUM IN
special_featuresDUTY CLASS LM SERIES
reliability_indicatorNOT ESTABLISHED
end_item_identificationDATA TERMINAL AFSCN/CUE
cross-sectional_thickness0.031 INCHES NOMINAL IN
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
terminal_surface_treatmentSOLDER
NSN5910-00-008-4422
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,MICA DIELECTRIC TITLE COMPONENT PN C121-9 MFR CAPACITOR,FIXED,MICA D
KEY FEATURES
•
INSULATION RESISTANCE AT MAXIMUM OPERATING TEMP: 20000.0 MEGOHMS
•
NONDERATED OPERATING TEMP: -55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
•
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION: 500.0 DC SINGLE SECTION
•
BODY WIDTH: 0.280 INCHES MAXIMUM IN
•
TOLERANCE RANGE PER SECTION: -5.00 TO 5.00 PERCENT SINGLE SECTION
•
SCHEMATIC DIAGRAM DESIGNATOR: NO COMMON OR GROUNDED ELECTRODE(S)
•
TERMINAL TYPE AND QUANTITY: 2 UNINSULATED WIRE LEAD
•
CAPACITANCE VALUE PER SECTION: 47.000 PICOFARADS SINGLE SECTION
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)
INSULATION RESISTANCE AT MAXIMUM OPERATING TEMP20000.0 MEGOHMS
NONDERATED OPERATING TEMP-55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION500.0 DC SINGLE SECTION
BODY WIDTH0.280 INCHES MAXIMUM IN
TOLERANCE RANGE PER SECTION-5.00 TO 5.00 PERCENT SINGLE SECTION
SCHEMATIC DIAGRAM DESIGNATORNO COMMON OR GROUNDED ELECTRODE(S)
TERMINAL TYPE AND QUANTITY2 UNINSULATED WIRE LEAD
CAPACITANCE VALUE PER SECTION47.000 PICOFARADS SINGLE SECTION
BODY HEIGHT0.130 INCHES MAXIMUM IN
INSULATION RESISTANCE AT REFERENCE TEMP100000.0 MEGOHMS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
121-56Interchangeable
interchangeable cross-reference
interchangeable
GPW9516Interchangeable
interchangeable cross-reference
interchangeable
116202Interchangeable
interchangeable cross-reference
interchangeable
1789755Interchangeable
interchangeable cross-reference
interchangeable
M782AInterchangeable
interchangeable cross-reference
interchangeable
10A7051Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C121-9?
C121-9 is a CAPACITOR,FIXED,MICA DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace C121-9?
There are 8 known substitutes for C121-9: 121-56, GPW9516, 116202 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C121-9?
C121-9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-008-4422. 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