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Technical Data Sheet
PartsTable / COMPONENT / 7138S
7138S ✓ 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,VARIABLE,AIR DIELECTRI. Key specifications include material: PORCELAIN OVERALL, first_slot_depth: 0.594 INCHES NOMINAL IN, outside_diameter: 1.625 INCHES NOMINAL IN, mounting_facility_type_and_quantity: 1 UNTHREADED HOLE(S). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5970-00-498-3740, 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
7138S
NSN: 5970-00-498-3740
FSC: 5970
CAGE: 73928 — KNOX PORCELAIN CORP (USA)
SPECIFICATIONS
materialPORCELAIN OVERALL
first_slot_depth0.594 INCHES NOMINAL IN
outside_diameter1.625 INCHES NOMINAL IN
mounting_facility_type_and_quantity1 UNTHREADED HOLE(S)
NSN5970-00-498-3740
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,AIR DIELECTRI TITLE COMPONENT PN 7138S MFR CAPACITOR,VARIABLE,AIR
KEY FEATURES
•
FIRST SLOT DEPTH: 0.594 INCHES NOMINAL IN
•
MOUNTING FACILITY TYPE AND QUANTITY: 1 UNTHREADED HOLE(S)
•
MATERIAL: PORCELAIN OVERALL
•
OUTSIDE DIAMETER: 1.625 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)
FIRST SLOT DEPTH0.594 INCHES NOMINAL IN
MOUNTING FACILITY TYPE AND QUANTITY1 UNTHREADED HOLE(S)
MATERIALPORCELAIN OVERALL
OUTSIDE DIAMETER1.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
WWP521Interchangeable
interchangeable cross-reference
interchangeable
B16.3Interchangeable
interchangeable cross-reference
interchangeable
221-530Interchangeable
interchangeable cross-reference
interchangeable
150 HInterchangeable
interchangeable cross-reference
interchangeable
44178Interchangeable
interchangeable cross-reference
interchangeable
GGG-D-751Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7138S?
7138S is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace 7138S?
There are 24 known substitutes for 7138S: WWP521, B16.3, 221-530 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7138S?
7138S is cataloged in the Federal Logistics Information System (FLIS) under NSN 5970-00-498-3740. 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