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PartsTable / COMPONENT / BS731PC4US
BS731PC4US ✓ 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

CAPACITOR,FIXED,MICA DIELECTRIC. Key specifications include material: COPPER ALLOY, body_style: INTERNAL AND EXTERNAL FLANGE, corner_shape: SQUARE ALL CORNERS, overall_length: 0.728 INCHES NOMINAL IN, flange_diameter: 5.095 INCHES NOMINAL IN, special_features: FURNISHED WITH FOUR SCREWS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-398-9389, 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
BS731PC4US
NSN: 4320-00-398-9389
FSC: 4320
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
materialCOPPER ALLOY
body_styleINTERNAL AND EXTERNAL FLANGE
corner_shapeSQUARE ALL CORNERS
overall_length0.728 INCHES NOMINAL IN
flange_diameter5.095 INCHES NOMINAL IN
special_featuresFURNISHED WITH FOUR SCREWS
bolt_hole_quantity4
body_inside_diameter3.715 INCHES NOMINAL IN
bolt_circle_diameter4.634 INCHES NOMINAL IN
body_outside_diameter4.250 INCHES NOMINAL IN
internal_flange_width0.335 INCHES NOMINAL IN
left_side_flange_thickness0.190 INCHES NOMINAL IN
NSN4320-00-398-9389
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,MICA DIELECTRIC TITLE COMPONENT PN BS731PC4US MFR CAPACITOR,FIXED,MICA D
KEY FEATURES
•
BODY INSIDE DIAMETER: 3.715 INCHES NOMINAL IN
•
LEFT SIDE FLANGE THICKNESS: 0.190 INCHES NOMINAL IN
•
CORNER SHAPE: SQUARE ALL CORNERS
•
INTERNAL FLANGE WIDTH: 0.335 INCHES NOMINAL IN
•
INTERNAL FLANGE INSIDE DIAMETER: 2.980 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 4.250 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY
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)
BODY INSIDE DIAMETER3.715 INCHES NOMINAL IN
LEFT SIDE FLANGE THICKNESS0.190 INCHES NOMINAL IN
SPECIAL FEATURESFURNISHED WITH FOUR SCREWS
CORNER SHAPESQUARE ALL CORNERS
INTERNAL FLANGE WIDTH0.335 INCHES NOMINAL IN
INTERNAL FLANGE INSIDE DIAMETER2.980 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER4.250 INCHES NOMINAL IN
MATERIALCOPPER ALLOY
BOLT CIRCLE DIAMETER4.634 INCHES NOMINAL IN
UNTHREADED MOUNTING HOLE DIAMETER0.205 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
C5AInterchangeable
interchangeable cross-reference
interchangeable
3405-1226-1612Interchangeable
interchangeable cross-reference
interchangeable
C169Interchangeable
interchangeable cross-reference
interchangeable
81464Interchangeable
interchangeable cross-reference
interchangeable
CP-16Interchangeable
interchangeable cross-reference
interchangeable
620Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BS731PC4US?
BS731PC4US is a CAPACITOR,FIXED,MICA DIELECTRIC.
What parts can replace BS731PC4US?
There are 20 known substitutes for BS731PC4US: C5A, 3405-1226-1612, C169 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BS731PC4US?
BS731PC4US is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-398-9389. 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