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57U ✓ 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,FIXED,PAPER DIELECTRIC. Key specifications include material: IRON, body_style: STRAIGHT SHAPE, body_length: 0.250 INCHES NOMINAL IN, tuning_type: FIXED, control_type: REMOTE, corner_shape: SQUARE OUTSIDE RIGHT CORNER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2990-00-441-8105, 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
57U
NSN: 2990-00-441-8105
FSC: 2990
CAGE: 77432 — INTERNATIONAL PARTS CORP DIV OF MIDAS-INTERNATIONAL CORP (USA)
SPECIFICATIONS
materialIRON
body_styleSTRAIGHT SHAPE
body_length0.250 INCHES NOMINAL IN
tuning_typeFIXED
control_typeREMOTE
corner_shapeSQUARE OUTSIDE RIGHT CORNER
flange_width0.0220 INCHES NOMINAL IN
model_number1082 SERIES
power_rating50.0 WATTS NOMINAL
document_typeCOMMERCIAL CATALOG
end_item_nameALARM SYSTEM MAGNETIC CONTACT
overall_width0.290 INCHES NOMINAL IN
NSN2990-00-441-8105
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,PAPER DIELECTRIC TITLE COMPONENT PN 57U MFR CAPACITOR,FIXED,PAPER
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 18
1087Interchangeable
interchangeable cross-reference
interchangeable
2690Interchangeable
interchangeable cross-reference
interchangeable
5703Interchangeable
interchangeable cross-reference
interchangeable
4643BInterchangeable
interchangeable cross-reference
interchangeable
JMC5703Interchangeable
interchangeable cross-reference
interchangeable
199T5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 57U?
57U is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace 57U?
There are 18 known substitutes for 57U: 1087, 2690, 5703 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 57U?
57U is cataloged in the Federal Logistics Information System (FLIS) under NSN 2990-00-441-8105. 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