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Technical Data Sheet
1B857 ✓ 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

The CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include anode_type: PLAIN FOIL, body_style: W/O MTG FACILITIES, AXIAL TERMINALS, body_length: 1.187 INCHES NOMINAL IN, body_diameter: 0.437 INCHES NOMINAL IN, terminal_length: 1.500 INCHES MINIMUM IN, features_provided: HERMETICALLY SEALED CASE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-892-7970, 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 1B857
NSN: 5910-00-892-7970
FSC: 5910
CAGE: 74861 — CHARLES INDUSTRIES, LLC DIV TELECOM (USA)
SPECIFICATIONS
anode_typePLAIN FOIL
body_styleW/O MTG FACILITIES, AXIAL TERMINALS
body_length1.187 INCHES NOMINAL IN
body_diameter0.437 INCHES NOMINAL IN
terminal_length1.500 INCHES MINIMUM IN
features_providedHERMETICALLY SEALED CASE
terminal_diameter0.025 INCHES NOMINAL IN
reliability_indicatorNOT ESTABLISHED
electrical_polarizationPOLARIZED
nonderated_operating_temp-40.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
terminal_surface_treatmentSOLDER
terminal_type_and_quantity2 UNINSULATED WIRE LEAD
NSN5910-00-892-7970
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,ELECTROLYTIC TITLE COMPONENT PN 1B857 MFR CAPACITOR,FIXED,ELECTR
KEY FEATURES
BODY STYLE: W/O MTG FACILITIES, AXIAL TERMINALS
RELIABILITY INDICATOR: NOT ESTABLISHED
TERMINAL DIAMETER: 0.025 INCHES NOMINAL IN
FEATURES PROVIDED: HERMETICALLY SEALED CASE
SCHEMATIC DIAGRAM DESIGNATOR: ELECTRODE(S) GROUNDED TO CASE, W/GND TERMINAL
ELECTRICAL POLARIZATION: POLARIZED
ANODE TYPE: PLAIN FOIL
CAPACITANCE VALUE PER SECTION: 25.000 MICROFARADS SINGLE SECTION
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)
BODY STYLEW/O MTG FACILITIES, AXIAL TERMINALS
RELIABILITY INDICATORNOT ESTABLISHED
TERMINAL DIAMETER0.025 INCHES NOMINAL IN
FEATURES PROVIDEDHERMETICALLY SEALED CASE
SCHEMATIC DIAGRAM DESIGNATORELECTRODE(S) GROUNDED TO CASE, W/GND TERMINAL
ELECTRICAL POLARIZATIONPOLARIZED
ANODE TYPEPLAIN FOIL
CAPACITANCE VALUE PER SECTION25.000 MICROFARADS SINGLE SECTION
TOLERANCE RANGE PER SECTION-20.00 TO 20.00 PERCENT SINGLE SECTION
TERMINAL LENGTH1.500 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
23208Interchangeable
interchangeable cross-reference
interchangeable
10-27522Interchangeable
interchangeable cross-reference
interchangeable
71931Interchangeable
interchangeable cross-reference
interchangeable
35026Interchangeable
interchangeable cross-reference
interchangeable
W-D-661Interchangeable
interchangeable cross-reference
interchangeable
13857Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1B857?
1B857 is a CAPACITOR,FIXED,ELECTROLYTIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1B857?
There are 12 known substitutes for 1B857: 23208, 10-27522, 71931 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1B857?
1B857 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-892-7970. This indicates validated use in U.S. government and defense supply chains.
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