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Technical Data Sheet
PartsTable / MRO / 128311H1
128311H1 ✓ 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 shaft_type: ROUND, V FLATTED SINGLE ACTUATOR, shaft_length: 0.875 INCHES NOMINAL SINGLE ACTUATOR IN, thread_class: 2A SINGLE MOUNTING FACILITY A, overall_width: 1.609 INCHES MAXIMUM IN, terminal_type: TAB, SOLDER LUG, thread_length: 0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY 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 5930-00-248-6267, 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→ 128311H1
NSN: 5930-00-248-6267
FSC: 5930
CAGE: 76854 — ELECTRO SWITCH CORP. DBA OAK GRISGSBY DIV ELECTROSWITCH (USA)
SPECIFICATIONS
shaft_typeROUND, V FLATTED SINGLE ACTUATOR
shaft_length0.875 INCHES NOMINAL SINGLE ACTUATOR IN
thread_class2A SINGLE MOUNTING FACILITY A
overall_width1.609 INCHES MAXIMUM IN
terminal_typeTAB, SOLDER LUG
thread_length0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
overall_height1.875 INCHES NOMINAL IN
overall_length2.187 INCHES NOMINAL IN
shaft_diameter0.250 INCHES NOMINAL SINGLE ACTUATOR IN
mounting_methodTHREADED BUSHING SINGLE MOUNTING FACILITY
style_designatorCIRCULAR WAFER, BUSHING MOUNT
first_flat_length0.875 INCHES NOMINAL SINGLE ACTUATOR IN
NSN5930-00-248-6267
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,ELECTROLYTIC TITLE COMPONENT PN 128311H1 MFR CAPACITOR,FIXED,ELECTR
KEY FEATURES
•
PRECIOUS MATERIAL AND LOCATION: CONTACTS AND ROTOR BLADE SURFACES SILVER
•
SHAFT LENGTH: 0.875 INCHES NOMINAL SINGLE ACTUATOR IN
•
SWITCH CONTACT BASIC DESIGN: NONPILE-UP NONSYMMETRICAL
•
SWITCH ACTUATOR INDEXING POSITION QUANTITY: 2 SINGLE ACTUATOR
•
PRECIOUS MATERIAL: SILVER
•
SWITCH ACTUATOR STOP DEVICE TYPE: FIXED STOP SINGLE ACTUATOR
•
CONTACT VOLTAGE RATING IN VOLTS: 110.0 AC AT SEA LEVEL
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)
PRECIOUS MATERIAL AND LOCATIONCONTACTS AND ROTOR BLADE SURFACES SILVER
OVERALL HEIGHT1.875 INCHES NOMINAL IN
SHAFT LENGTH0.875 INCHES NOMINAL SINGLE ACTUATOR IN
SWITCH CONTACT BASIC DESIGNNONPILE-UP NONSYMMETRICAL
SWITCH ACTUATOR INDEXING POSITION QUANTITY2 SINGLE ACTUATOR
PRECIOUS MATERIALSILVER
SWITCH ACTUATOR STOP DEVICE TYPEFIXED STOP SINGLE ACTUATOR
CONTACT VOLTAGE RATING IN VOLTS110.0 AC AT SEA LEVEL
SHAFT TYPEROUND, V FLATTED SINGLE ACTUATOR
STYLE DESIGNATORCIRCULAR WAFER, BUSHING MOUNT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
N451PC161Interchangeable
interchangeable cross-reference
interchangeable
N513Interchangeable
interchangeable cross-reference
interchangeable
N565Interchangeable
interchangeable cross-reference
interchangeable
YB3210J71JInterchangeable
interchangeable cross-reference
interchangeable
CL55S48-465Interchangeable
interchangeable cross-reference
interchangeable
CL55S48-465ALT2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 128311H1?
128311H1 is a CAPACITOR,FIXED,ELECTROLYTIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 128311H1?
There are 11 known substitutes for 128311H1: N451PC161, N513, N565 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 128311H1?
128311H1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-248-6267. 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