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Technical Data Sheet
PartsTable / COMPONENT / 85-004B
85-004B ✓ 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 tube_type: DIODE, special_features: MFTR. CLASSIFICATION:HIGH VACUUM; ENVELOPE MATERIAL:GLASS; WEAPON SYSTEM ESSENTIAL, envelope_medium_type: VACUUM, end_item_identification: VARIOUS SHORE ATC; GUIDED MISSILE, INTERCEPT; ANTI-SUB SYSTEMS, nondefinitive_spec/std_data: 7363 TYPE, specification/standard_data: 81349-MIL-E-1/1286 GOVERNMENT SPECIFICATION.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5960-00-060-3449, 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
85-004B
NSN: 5960-00-060-3449
FSC: 5960
CAGE: 16236 — DLA LAND AND MARITIME DBA ENGINEERING AND TECHNICAL SUPPORT DIV DOCUMENT STANDARDIZATION DIVISION (VENDOR ITEM DRAWINGS) (USA)
SPECIFICATIONS
tube_typeDIODE
special_featuresMFTR. CLASSIFICATION:HIGH VACUUM; ENVELOPE MATERIAL:GLASS; WEAPON SYSTEM ESSENTIAL
envelope_medium_typeVACUUM
end_item_identificationVARIOUS SHORE ATC; GUIDED MISSILE, INTERCEPT; ANTI-SUB SYSTEMS
nondefinitive_spec/std_data7363 TYPE
specification/standard_data81349-MIL-E-1/1286 GOVERNMENT SPECIFICATION
criticality_code_justificationFEAT
NSN5960-00-060-3449
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,AIR DIELECTRI TITLE COMPONENT PN 85-004B MFR CAPACITOR,VARIABLE,AIR
KEY FEATURES
•
ENVELOPE MEDIUM TYPE: VACUUM
•
NONDEFINITIVE SPEC/STD DATA: 3B24WB TYPE
•
TUBE TYPE: RECTIFIER
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)
ENVELOPE MEDIUM TYPEVACUUM
NONDEFINITIVE SPEC/STD DATA3B24WB TYPE
SPECIAL FEATURESMFTR. CLASSIFICATION:HIGH VACUUM RUGGEDIZED; ENVELOPE MATERIAL:GLASS
TUBE TYPERECTIFIER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
85-004BInterchangeable
interchangeable cross-reference
interchangeable
3B29WInterchangeable
interchangeable cross-reference
interchangeable
MIL-E-1/1317Interchangeable
interchangeable cross-reference
interchangeable
MILE1-1374Interchangeable
interchangeable cross-reference
interchangeable
JAN3B24WBMInterchangeable
interchangeable cross-reference
interchangeable
290-1196P1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 85-004B?
85-004B is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace 85-004B?
There are 22 known substitutes for 85-004B: 85-004B, 3B29W, MIL-E-1/1317 and 19 more. Substitute compatibility should be verified for your specific system.
Is 85-004B still available?
85-004B 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