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Technical Data Sheet
PartsTable / COMPONENT / AC-3C-MD
AC-3C-MD ✓ 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,VARIABLE,CERAMIC DIELE. Key specifications include general_characteristics_item_description: 8.125 IN. O/A LG;4.250 O/A H IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-01-115-3815, 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
AC-3C-MD
NSN: 4320-01-115-3815
FSC: 4320
CAGE: 27901 — UNITED STATES PLASTIC CORP (USA)
SPECIFICATIONS
general_characteristics_item_description8.125 IN. O/A LG;4.250 O/A H IN
NSN4320-01-115-3815
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,CERAMIC DIELE TITLE COMPONENT PN AC-3C-MD MFR CAPACITOR,VARIABLE,CER
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: 8.125 IN. O/A LG;4.250 O/A H 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)
GENERAL CHARACTERISTICS ITEM DESCRIPTION8.125 IN. O/A LG;4.250 O/A H IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
640-21Interchangeable
interchangeable cross-reference
interchangeable
F12675-21Interchangeable
interchangeable cross-reference
interchangeable
2920137-21Interchangeable
interchangeable cross-reference
interchangeable
94021Interchangeable
interchangeable cross-reference
interchangeable
A-840808-01Interchangeable
interchangeable cross-reference
interchangeable
720Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AC-3C-MD?
AC-3C-MD is a CAPACITOR,VARIABLE,CERAMIC DIELE.
What parts can replace AC-3C-MD?
There are 8 known substitutes for AC-3C-MD: 640-21, F12675-21, 2920137-21 and 5 more. Substitute compatibility should be verified for your specific system.
Is AC-3C-MD still available?
AC-3C-MD is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026