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Technical Data Sheet
PartsTable / MRO / CV21A120
CV21A120 ✓ 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,VARIABLE,CERAMIC DIELE. Key specifications include body_style: ROTARY, body_width: 0.880 INCHES NOMINAL IN, body_height: 0.406 INCHES MAXIMUM IN, body_length: 1.300 INCHES NOMINAL IN, inclosure_type: ENCAPSULATED, adjustment_device_torque: 4.000 INCH-OUNCES MINIMUM AND 24.000 INCH-OUNCES MAXIMUM 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 5910-00-636-4433, 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→ CV21A120
NSN: 5910-00-636-4433
FSC: 5910
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
body_styleROTARY
body_width0.880 INCHES NOMINAL IN
body_height0.406 INCHES MAXIMUM IN
body_length1.300 INCHES NOMINAL IN
inclosure_typeENCAPSULATED
adjustment_device_torque4.000 INCH-OUNCES MINIMUM AND 24.000 INCH-OUNCES MAXIMUM IN
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
terminal_type_and_quantity4 TAB, SOLDER LUG
individual_section_quantity2
capacitance_drift_in_picofarads0.50 ALL SECTIONS
capacitance_range_in_picofarads+3.0 TO 12.0 ALL SECTIONS
unthreaded_mounting_hole_diameter0.145 INCHES NOMINAL IN
NSN5910-00-636-4433
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,CERAMIC DIELE TITLE COMPONENT PN CV21A120 MFR CAPACITOR,VARIABLE,CER
KEY FEATURES
•
INDIVIDUAL SECTION QUANTITY: 2
•
BODY WIDTH: 0.880 INCHES NOMINAL IN
•
CAPACITANCE DRIFT IN PICOFARADS: 0.50 ALL SECTIONS
•
UNTHREADED MOUNTING HOLE DIAMETER: 0.145 INCHES NOMINAL IN
•
CAPACITANCE RANGE IN PICOFARADS: +3.0 TO 12.0 ALL SECTIONS
•
ADJUSTMENT DEVICE DRIVE TYPE AND QUANTITY: 2 SLOTTED SCREW
•
CAPACITANCE CHANGE IN PERCENT AT OPERATING TEMP FROM 25 DEG CELSIUS: -4.50 TO 2.00 MINIMUM AND -2.50 TO 2.00 MAXIMUM ALL SECTIONS
•
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY WIDTH: 0.625 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)
INDIVIDUAL SECTION QUANTITY2
BODY WIDTH0.880 INCHES NOMINAL IN
CAPACITANCE DRIFT IN PICOFARADS0.50 ALL SECTIONS
UNTHREADED MOUNTING HOLE DIAMETER0.145 INCHES NOMINAL IN
CAPACITANCE RANGE IN PICOFARADS+3.0 TO 12.0 ALL SECTIONS
ADJUSTMENT DEVICE DRIVE TYPE AND QUANTITY2 SLOTTED SCREW
CAPACITANCE CHANGE IN PERCENT AT OPERATING TEMP FROM 25 DEG CELSIUS-4.50 TO 2.00 MINIMUM AND -2.50 TO 2.00 MAXIMUM ALL SECTIONS
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY WIDTH0.625 INCHES NOMINAL IN
INSULATION DC RESISTANCE AT 25 DEG CELSIUS10.0 GIGOHMS
MOUNTING FACILITY TYPE AND QUANTITY2 UNTHREADED HOLE(S)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
507001C7-0-45Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-81/2Interchangeable
interchangeable cross-reference
interchangeable
CV14C450Interchangeable
interchangeable cross-reference
interchangeable
CV11B130Interchangeable
interchangeable cross-reference
interchangeable
503-04119RInterchangeable
interchangeable cross-reference
interchangeable
8175962Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CV21A120?
CV21A120 is a CAPACITOR,VARIABLE,CERAMIC DIELE. It is classified as a MRO (MRO_GENERAL).
What parts can replace CV21A120?
There are 24 known substitutes for CV21A120: 507001C7-0-45, MIL-C-81/2, CV14C450 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CV21A120?
CV21A120 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-636-4433. 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