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CP643 ✓ Verified by PartsTable
— · COMPONENT
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,PAPER DIELECTRIC. Key specifications include overall_length: 0.260 INCHES MAXIMUM IN, mounting_method: TERMINAL, terminal_length: 0.500 INCHES MINIMUM IN, overall_diameter: 0.335 INCHES MAXIMUM IN, features_provided: HERMETICALLY SEALED CASE, internal_configuration: FIELD EFFECT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2930-01-032-8168, 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
CP643
NSN: 2930-01-032-8168
FSC: 2930
CAGE: 19239 — ECHLIN INC (USA)
SPECIFICATIONS
overall_length0.260 INCHES MAXIMUM IN
mounting_methodTERMINAL
terminal_length0.500 INCHES MINIMUM IN
overall_diameter0.335 INCHES MAXIMUM IN
features_providedHERMETICALLY SEALED CASE
internal_configurationFIELD EFFECT
semiconductor_materialSILICON
terminal_circle_diameter0.190 INCHES MAXIMUM IN
terminal_type_and_quantity3 UNINSULATED WIRE LEAD
power_rating_per_characteristic2.0 WATTS MAXIMUM TOTAL POWER DISSIPATION
current_rating_per_characteristic300.00 MILLIAMPERES MAXIMUM DRAIN CURRENT
maximum_operating_temp_per_measurement_point150.0 CELSIUS JUNCTION DEGC
NSN2930-01-032-8168
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,PAPER DIELECTRIC TITLE COMPONENT PN CP643 MFR CAPACITOR,FIXED,PAPER
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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
8327331Interchangeable
interchangeable cross-reference
interchangeable
PX2030Interchangeable
interchangeable cross-reference
interchangeable
298445Interchangeable
interchangeable cross-reference
interchangeable
169Interchangeable
interchangeable cross-reference
interchangeable
2104257Interchangeable
interchangeable cross-reference
interchangeable
75Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CP643?
CP643 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace CP643?
There are 20 known substitutes for CP643: 8327331, PX2030, 298445 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CP643?
CP643 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2930-01-032-8168. 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