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Technical Data Sheet
PartsTable / MRO / HAT21A
HAT21A ✓ 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

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 anode_type: SOLID, body_style: W/O MTG FACILITIES, AXIAL TERMINALS, body_length: 0.210 INCHES MAXIMUM IN, body_diameter: 0.082 INCHES MAXIMUM IN, terminal_length: 1.000 INCHES MINIMUM IN, terminal_diameter: 0.016 INCHES NOMINAL 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 5910-00-120-8154, 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→ HAT21A
NSN: 5910-00-120-8154
FSC: 5910
CAGE: 37942 — YOSEMITE INVESTMENT INC DBA NORTH AMERICAN CAPACITOR CO (USA)
SPECIFICATIONS
anode_typeSOLID
body_styleW/O MTG FACILITIES, AXIAL TERMINALS
body_length0.210 INCHES MAXIMUM IN
body_diameter0.082 INCHES MAXIMUM IN
terminal_length1.000 INCHES MINIMUM IN
terminal_diameter0.016 INCHES NOMINAL IN
reliability_indicatorNOT ESTABLISHED
electrical_polarizationPOLARIZED
case_insulation_materialPLASTIC
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
terminal_type_and_quantity2 UNINSULATED WIRE LEAD
tolerance_range_per_section-20.00 TO 20.00 PERCENT SINGLE SECTION
NSN5910-00-120-8154
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,ELECTROLYTIC TITLE COMPONENT PN HAT21A MFR CAPACITOR,FIXED,ELECTR
KEY FEATURES
•
TOLERANCE RANGE PER SECTION: -20.00 TO 20.00 PERCENT SINGLE SECTION
•
SCHEMATIC DIAGRAM DESIGNATOR: ELECTRODE(S) GROUNDED TO CASE, W/GND TERMINAL
•
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION: 20.0 DC SINGLE SECTION
•
NONDERATED OPERATING TEMP: -55.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
•
ANODE TYPE: SOLID
•
DC LEAKAGE AT MAXIMUM OPERATING TEMP: 15.0 MICROAMPERES
•
TERMINAL DIAMETER: 0.016 INCHES NOMINAL IN
•
TERMINAL LENGTH: 1.000 INCHES MINIMUM 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)
TOLERANCE RANGE PER SECTION-20.00 TO 20.00 PERCENT SINGLE SECTION
SCHEMATIC DIAGRAM DESIGNATORELECTRODE(S) GROUNDED TO CASE, W/GND TERMINAL
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION20.0 DC SINGLE SECTION
NONDERATED OPERATING TEMP-55.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
ANODE TYPESOLID
DC LEAKAGE AT MAXIMUM OPERATING TEMP15.0 MICROAMPERES
TERMINAL DIAMETER0.016 INCHES NOMINAL IN
TERMINAL LENGTH1.000 INCHES MINIMUM IN
BODY LENGTH0.210 INCHES MAXIMUM IN
CAPACITANCE VALUE PER SECTION1.000 MICROFARADS SINGLE SECTION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
ASTM D5363Interchangeable
interchangeable cross-reference
interchangeable
29021Interchangeable
interchangeable cross-reference
interchangeable
SM-C-808811-1Interchangeable
interchangeable cross-reference
interchangeable
5502-49Interchangeable
interchangeable cross-reference
interchangeable
JAN1N5476CInterchangeable
interchangeable cross-reference
interchangeable
JAN1N5476BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HAT21A?
HAT21A is a CAPACITOR,FIXED,ELECTROLYTIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace HAT21A?
There are 11 known substitutes for HAT21A: ASTM D5363, 29021, SM-C-808811-1 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HAT21A?
HAT21A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-120-8154. 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