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A221-79 ✓ 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

The CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include general_characteristics_item_description: BRASS,CADMIUM PLATED,1.0 IN. O/A DIA,0.625 IN.

H,0.031 IN. THK MATERIAL 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 2915-00-049-3678, 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
A221-79
NSN: 2915-00-049-3678
FSC: 2915
CAGE: 96152 — BORG-WARNER CORP MARVEL-SCHEBLER/TILLOTSON DIV (USA)
SPECIFICATIONS
general_characteristics_item_descriptionBRASS,CADMIUM PLATED,1.0 IN. O/A DIA,0.625 IN. H,0.031 IN. THK MATERIAL IN
NSN2915-00-049-3678
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,ELECTROLYTIC TITLE COMPONENT PN A221-79 MFR CAPACITOR,FIXED,ELECTR
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: BRASS,CADMIUM PLATED,1.0 IN. O/A DIA,0.625 IN. H,0.031 IN. THK MATERIAL 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 DESCRIPTIONBRASS,CADMIUM PLATED,1.0 IN. O/A DIA,0.625 IN. H,0.031 IN. THK MATERIAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
221-79Interchangeable
interchangeable cross-reference
interchangeable
SM-A-617906-29Interchangeable
interchangeable cross-reference
interchangeable
E1811PC51Interchangeable
interchangeable cross-reference
interchangeable
E1811YPC51Interchangeable
interchangeable cross-reference
interchangeable
B4494Interchangeable
interchangeable cross-reference
interchangeable
386-7261P001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A221-79?
A221-79 is a CAPACITOR,FIXED,ELECTROLYTIC.
What parts can replace A221-79?
There are 10 known substitutes for A221-79: 221-79, SM-A-617906-29, E1811PC51 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A221-79?
A221-79 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2915-00-049-3678. 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