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Technical Data Sheet
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7858-3 — Technical Data Sheet

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— · 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

CAPACITOR,FIXED,MICA DIELECTRIC. Key specifications include material: STEEL CORROSION RESISTING BODY, body_style: W/MTG TABS/FLANGES, TERMINAL(S) ON ONE SURFACE, body_width: 2.438 INCHES NOMINAL IN, body_height: 2.938 INCHES NOMINAL IN, body_length: 3.062 INCHES NOMINAL IN, pressure_rating: 450.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-643-8695, 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→ 7858-3
NSN: 5910-00-643-8695
FSC: 5910
CAGE: 99380 — SIERRA NETWORKS INC SIERRACOM DIV (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
body_styleW/MTG TABS/FLANGES, TERMINAL(S) ON ONE SURFACE
body_width2.438 INCHES NOMINAL IN
body_height2.938 INCHES NOMINAL IN
body_length3.062 INCHES NOMINAL IN
pressure_rating450.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
terminal_length0.688 INCHES NOMINAL IN
terminal_diameter0.164 INCHES NOMINAL IN
reliability_indicatorNOT ESTABLISHED
design_characteristicsSINGLE ACTING SINGLE CYLINDER
end_item_identification3040-01-217-2682
shaft_rotation_directionCLOCKWISE AND COUNTERCLOCKWISE
NSN5910-00-643-8695
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,MICA DIELECTRIC TITLE COMPONENT PN 7858-3 MFR CAPACITOR,FIXED,MICA D
KEY FEATURES
•
TERMINAL TYPE AND QUANTITY: 2 THREADED STUD
•
CAPACITANCE VALUE PER SECTION: 1000.000 PICOFARADS SINGLE SECTION
•
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY LENGTH: 3.688 INCHES NOMINAL IN
•
SCHEMATIC DIAGRAM DESIGNATOR: NO COMMON OR GROUNDED ELECTRODE(S)
•
TOLERANCE RANGE PER SECTION: -2.00 TO 2.00 PERCENT SINGLE SECTION
•
BODY LENGTH: 3.062 INCHES NOMINAL IN
•
TERMINAL LENGTH: 0.688 INCHES NOMINAL IN
•
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY WIDTH: 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)
TERMINAL TYPE AND QUANTITY2 THREADED STUD
CAPACITANCE VALUE PER SECTION1000.000 PICOFARADS SINGLE SECTION
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY LENGTH3.688 INCHES NOMINAL IN
SCHEMATIC DIAGRAM DESIGNATORNO COMMON OR GROUNDED ELECTRODE(S)
TOLERANCE RANGE PER SECTION-2.00 TO 2.00 PERCENT SINGLE SECTION
BODY LENGTH3.062 INCHES NOMINAL IN
TERMINAL LENGTH0.688 INCHES NOMINAL IN
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY WIDTH1.625 INCHES NOMINAL IN
BODY HEIGHT2.938 INCHES NOMINAL IN
NONDERATED OPERATING TEMP-20.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
78583-1Interchangeable
interchangeable cross-reference
interchangeable
78728-1Interchangeable
interchangeable cross-reference
interchangeable
78583 ITEM 9Interchangeable
interchangeable cross-reference
interchangeable
78583 ITEM 10Interchangeable
interchangeable cross-reference
interchangeable
78729-1Interchangeable
interchangeable cross-reference
interchangeable
F3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7858-3?
7858-3 is a CAPACITOR,FIXED,MICA DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 7858-3?
There are 7 known substitutes for 7858-3: 78583-1, 78728-1, 78583 ITEM 9 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7858-3?
7858-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-643-8695. 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.
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Last verified: September 2026