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Technical Data Sheet
PartsTable / MRO / HSP318-21
HSP318-21 ✓ 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 body_style: W/O MTG FACILITIES, AXIAL TERMINALS, body_length: 0.828 INCHES NOMINAL IN, body_diameter: 0.391 INCHES NOMINAL IN, terminal_length: 2.250 INCHES NOMINAL IN, features_provided: HERMETICALLY SEALED CASE, reliability_indicator: NOT ESTABLISHED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-953-9238, 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→ HSP318-21
NSN: 5910-00-953-9238
FSC: 5910
CAGE: 21520 — FANSTEEL INC. DBA AUTOMATED EQUIPMENT & TOOLING DIVISION (USA)
SPECIFICATIONS
body_styleW/O MTG FACILITIES, AXIAL TERMINALS
body_length0.828 INCHES NOMINAL IN
body_diameter0.391 INCHES NOMINAL IN
terminal_length2.250 INCHES NOMINAL IN
features_providedHERMETICALLY SEALED CASE
reliability_indicatorNOT ESTABLISHED
electrical_polarizationPOLARIZED
case_insulation_materialPLASTIC
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
terminal_type_and_quantity2 UNINSULATED WIRE LEAD
tolerance_range_per_section-20.00 TO 20.00 PERCENT SINGLE SECTION
dc_leakage_at_reference_temp5.000 MICROAMPERES
NSN5910-00-953-9238
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,ELECTROLYTIC TITLE COMPONENT PN HSP318-21 MFR CAPACITOR,FIXED,ELECTR
KEY FEATURES
•
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION: 50.0 DC SINGLE SECTION
•
FEATURES PROVIDED: HERMETICALLY SEALED CASE
•
TERMINAL LENGTH: 2.250 INCHES NOMINAL IN
•
CASE INSULATION MATERIAL: PLASTIC
•
EQUIVALENT SERIES RESISTANCE AT REFERENCE TEMP IN OHMS: 6.00
•
TERMINAL TYPE AND QUANTITY: 2 UNINSULATED WIRE LEAD
•
DC LEAKAGE AT REFERENCE TEMP: 5.000 MICROAMPERES
•
CAPACITIVE ELECTRODE MATERIAL: TANTALUM
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)
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION50.0 DC SINGLE SECTION
FEATURES PROVIDEDHERMETICALLY SEALED CASE
TERMINAL LENGTH2.250 INCHES NOMINAL IN
CASE INSULATION MATERIALPLASTIC
EQUIVALENT SERIES RESISTANCE AT REFERENCE TEMP IN OHMS6.00
TERMINAL TYPE AND QUANTITY2 UNINSULATED WIRE LEAD
DC LEAKAGE AT REFERENCE TEMP5.000 MICROAMPERES
CAPACITIVE ELECTRODE MATERIALTANTALUM
TOLERANCE RANGE PER SECTION-20.00 TO 20.00 PERCENT SINGLE SECTION
BODY LENGTH0.828 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
AMS-QQ-A-200/11Interchangeable
interchangeable cross-reference
interchangeable
PA5352Interchangeable
interchangeable cross-reference
interchangeable
15427Interchangeable
interchangeable cross-reference
interchangeable
WPP1677Interchangeable
interchangeable cross-reference
interchangeable
S703Interchangeable
interchangeable cross-reference
interchangeable
172531Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HSP318-21?
HSP318-21 is a CAPACITOR,FIXED,ELECTROLYTIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace HSP318-21?
There are 18 known substitutes for HSP318-21: AMS-QQ-A-200/11, PA5352, 15427 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HSP318-21?
HSP318-21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-953-9238. 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