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S556820 ✓ 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 diameter: 0.375 INCHES IN, material: STEEL, point_shape: FRUSTUM, overall_length: 60.000 INCHES IN, style_designator: CONICAL END, surface_treatment: COPPER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5975-00-263-0804, 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
S556820
NSN: 5975-00-263-0804
FSC: 5975
CAGE: 04773 — GTE COMMUNICATION SYSTEMS CORP (USA)
SPECIFICATIONS
diameter0.375 INCHES IN
materialSTEEL
point_shapeFRUSTUM
overall_length60.000 INCHES IN
section_quantity1
style_designatorCONICAL END
surface_treatmentCOPPER
NSN5975-00-263-0804
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,ELECTROLYTIC TITLE COMPONENT PN S556820 MFR CAPACITOR,FIXED,ELECTR
KEY FEATURES
•
MATERIAL: STEEL
•
STYLE DESIGNATOR: CONICAL END
•
SURFACE TREATMENT: COPPER
•
POINT SHAPE: FRUSTUM
•
DIAMETER: 0.375 INCHES IN
•
SECTION QUANTITY: 1
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)
MATERIALSTEEL
STYLE DESIGNATORCONICAL END
SURFACE TREATMENTCOPPER
POINT SHAPEFRUSTUM
DIAMETER0.375 INCHES IN
OVERALL LENGTH60.000 INCHES IN
SECTION QUANTITY1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
94-15Interchangeable
interchangeable cross-reference
interchangeable
5742018Interchangeable
interchangeable cross-reference
interchangeable
85-55Interchangeable
interchangeable cross-reference
interchangeable
D15-613HPC271-278Interchangeable
interchangeable cross-reference
interchangeable
D15-437APC271-278Interchangeable
interchangeable cross-reference
interchangeable
58042BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S556820?
S556820 is a CAPACITOR,FIXED,ELECTROLYTIC.
What parts can replace S556820?
There are 20 known substitutes for S556820: 94-15, 5742018, 85-55 and 17 more. Substitute compatibility should be verified for your specific system.
Is S556820 still available?
S556820 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