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Technical Data Sheet
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639959 ✓ 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

The CHARGER,BATTERY 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 material: STEEL, construction: ONE-PIECE, frequency_rating: 50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL, outside_diameter: 2.2500 INCHES NOMINAL IN, special_features: POWER INDICATOR LIGHT, style_designator: CIRCULAR. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5365-00-860-4701, 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
639959
NSN: 5365-00-860-4701
FSC: 5365
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
materialSTEEL
constructionONE-PIECE
frequency_rating50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL
outside_diameter2.2500 INCHES NOMINAL IN
special_featuresPOWER INDICATOR LIGHT
style_designatorCIRCULAR
ac_voltage_rating110.0 VOLTS NOMINAL
aperture_diameter1.7650 INCHES NOMINAL IN
fsc_application_dataDIFFERENTIAL,DRIVING AXLE
battery_type_for_which_designedNICKEL-CADMIUM
NSN5365-00-860-4701
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CHARGER,BATTERY TITLE COMPONENT PN 639959 MFR CHARGER,BATTERY
KEY FEATURES
•
APERTURE DIAMETER: 1.7650 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 2.2500 INCHES NOMINAL IN
•
CONSTRUCTION: ONE-PIECE
•
FSC APPLICATION DATA: DIFFERENTIAL,DRIVING AXLE
•
MATERIAL: STEEL
•
STYLE DESIGNATOR: CIRCULAR
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)
APERTURE DIAMETER1.7650 INCHES NOMINAL IN
OUTSIDE DIAMETER2.2500 INCHES NOMINAL IN
CONSTRUCTIONONE-PIECE
FSC APPLICATION DATADIFFERENTIAL,DRIVING AXLE
MATERIALSTEEL
STYLE DESIGNATORCIRCULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
S58Interchangeable
interchangeable cross-reference
interchangeable
1726-1000Interchangeable
interchangeable cross-reference
interchangeable
A-90Interchangeable
interchangeable cross-reference
interchangeable
MILR11-3Interchangeable
interchangeable cross-reference
interchangeable
302-151Interchangeable
interchangeable cross-reference
interchangeable
4171300-100Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 639959?
639959 is a CHARGER,BATTERY.
What parts can replace 639959?
There are 23 known substitutes for 639959: S58, 1726-1000, A-90 and 20 more. Substitute compatibility should be verified for your specific system.
Is 639959 still available?
639959 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