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B56559 ✓ 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,VARIABLE,CERAMIC DIELE. Key specifications include material: COPPER ALLOY, thickness: 0.438 INCHES NOMINAL IN, base_style: SUB-MIDGET FLANGED, body_style: PISTON, bore_shape: STRAIGHT, bulb_style: T (TUBULAR). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2010-00-411-2804, 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
B56559
NSN: 2010-00-411-2804
FSC: 2010
CAGE: 88907 — BRUNSWICK CORP DBA MERCURY MARINE DIV MERCURY MARINE (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thickness0.438 INCHES NOMINAL IN
base_styleSUB-MIDGET FLANGED
body_stylePISTON
bore_shapeSTRAIGHT
bulb_styleT (TUBULAR)
head_styleHEXAGON
shell_typeSOLID
body_length0.406 INCHES NOMINAL IN
head_height0.203 INCHES NOMINAL IN
thread_class2A A
bore_diameter200.0 MILLIMETERS NOMINAL MM
NSN2010-00-411-2804
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,CERAMIC DIELE TITLE COMPONENT PN B56559 MFR CAPACITOR,VARIABLE,CER
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 15
RE49F172Interchangeable
interchangeable cross-reference
interchangeable
M358Interchangeable
interchangeable cross-reference
interchangeable
9975738Interchangeable
interchangeable cross-reference
interchangeable
7240Interchangeable
interchangeable cross-reference
interchangeable
CM7240Interchangeable
interchangeable cross-reference
interchangeable
65-22479G01Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B56559?
B56559 is a CAPACITOR,VARIABLE,CERAMIC DIELE.
What parts can replace B56559?
There are 15 known substitutes for B56559: RE49F172, M358, 9975738 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B56559?
B56559 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2010-00-411-2804. 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