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Technical Data Sheet
PartsTable / COMPONENT / IS-237
IS-237 ✓ 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,CERAMIC DIELECTR. Key specifications include material: STEEL, overall_length: 4.875 INCHES NOMINAL IN, style_designator: CLOSED, tongue_thickness: 0.422 INCHES NOMINAL IN, features_provided: WEDGE, surface_treatment: CADMIUM OR ZINC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4030-00-249-3000, 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
IS-237
NSN: 4030-00-249-3000
FSC: 4030
CAGE: 79931 — ESMET INC (USA)
SPECIFICATIONS
materialSTEEL
overall_length4.875 INCHES NOMINAL IN
style_designatorCLOSED
tongue_thickness0.422 INCHES NOMINAL IN
features_providedWEDGE
surface_treatmentCADMIUM OR ZINC
bolt_hole_diameter0.516 INCHES NOMINAL IN
nondefinitive_spec/std_data1 TYPE AND D CLASS
accommodated_material_diameter0.375 INCHES NOMINAL IN
NSN4030-00-249-3000
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,CERAMIC DIELECTR TITLE COMPONENT PN IS-237 MFR CAPACITOR,FIXED,CERAMI
KEY FEATURES
•
MATERIAL: STEEL
•
BOLT HOLE DIAMETER: 0.516 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CLOSED
•
FEATURES PROVIDED: WEDGE
•
ACCOMMODATED MATERIAL DIAMETER: 0.375 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND D CLASS
•
TONGUE THICKNESS: 0.422 INCHES NOMINAL 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)
MATERIALSTEEL
BOLT HOLE DIAMETER0.516 INCHES NOMINAL IN
STYLE DESIGNATORCLOSED
FEATURES PROVIDEDWEDGE
OVERALL LENGTH4.875 INCHES NOMINAL IN
ACCOMMODATED MATERIAL DIAMETER0.375 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND D CLASS
TONGUE THICKNESS0.422 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
800106Interchangeable
interchangeable cross-reference
interchangeable
IS-237Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-21433Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is IS-237?
IS-237 is a CAPACITOR,FIXED,CERAMIC DIELECTR.
What parts can replace IS-237?
There are 3 known substitutes for IS-237: 800106, IS-237, MIL-S-21433. Substitute compatibility should be verified for your specific system.
Is IS-237 still available?
IS-237 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