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PartsTable / MRO / 1JB1855-9
1JB1855-9 ✓ Verified by PartsTable
— · 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 body_style: BUTTON TYPE, W/MTG TABS, body_length: 0.085 INCHES NOMINAL IN, body_diameter: 0.450 INCHES NOMINAL IN, special_features: CASE MATERIAL METAL, reliability_indicator: NOT ESTABLISHED, nonderated_operating_temp: -55.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-556-9387, 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→ 1JB1855-9
NSN: 5910-00-556-9387
FSC: 5910
CAGE: 79500 — WESTINGHOUSE ELECTRIC CORP (USA)
SPECIFICATIONS
body_styleBUTTON TYPE, W/MTG TABS
body_length0.085 INCHES NOMINAL IN
body_diameter0.450 INCHES NOMINAL IN
special_featuresCASE MATERIAL METAL
reliability_indicatorNOT ESTABLISHED
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
terminal_surface_treatmentSILVER
terminal_type_and_quantity2 TAB, SOLDER LUG
tolerance_range_per_section-2.00 TO 2.00 PERCENT SINGLE SECTION
schematic_diagram_designatorFEEDTHROUGH
capacitance_value_per_section510.000 PICOFARADS SINGLE SECTION
criticality_code_justificationFEAT
NSN5910-00-556-9387
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,MICA DIELECTRIC TITLE COMPONENT PN 1JB1855-9 MFR CAPACITOR,FIXED,MICA D
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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
1JB1855-9Interchangeable
interchangeable cross-reference
interchangeable
9101447Interchangeable
interchangeable cross-reference
interchangeable
370CB500PFPORM10Interchangeable
interchangeable cross-reference
interchangeable
370CB501KInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1JB1855-9?
1JB1855-9 is a CAPACITOR,FIXED,MICA DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1JB1855-9?
There are 4 known substitutes for 1JB1855-9: 1JB1855-9, 9101447, 370CB500PFPORM10 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1JB1855-9?
1JB1855-9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-556-9387. 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