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Technical Data Sheet
PartsTable / MRO / NMCD643
NMCD643 ✓ 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,VARIABLE,GLASS DIELECT. Key specifications include body_style: PISTON, body_length: 0.891 INCHES MINIMUM AND 0.953 INCHES MAXIMUM IN, bushing_shape: ROUND W/DOUBLE FLAT, bushing_width: 0.215 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN, bushing_length: 0.281 INCHES NOMINAL IN, inclosure_type: ENCAPSULATED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-535-9218, 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→ NMCD643
NSN: 5910-00-535-9218
FSC: 5910
CAGE: 52769 — SPRAGUE-GOODMAN ELECTRONICS, INC. (USA)
SPECIFICATIONS
body_stylePISTON
body_length0.891 INCHES MINIMUM AND 0.953 INCHES MAXIMUM IN
bushing_shapeROUND W/DOUBLE FLAT
bushing_width0.215 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
bushing_length0.281 INCHES NOMINAL IN
inclosure_typeENCAPSULATED
overall_length1.234 INCHES NOMINAL IN
bushing_diameter0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
overall_diameter0.313 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
adjustment_device_torque1.000 INCH-OUNCES MINIMUM AND 10.000 INCH-OUNCES MAXIMUM IN
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
NSN5910-00-535-9218
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,GLASS DIELECT TITLE COMPONENT PN NMCD643 MFR CAPACITOR,VARIABLE,GLA
KEY FEATURES
•
BUSHING LENGTH: 0.281 INCHES NOMINAL IN
•
BUSHING DIAMETER: 0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
BODY STYLE: PISTON
•
OVERALL DIAMETER: 0.313 INCHES NOMINAL IN
•
BODY LENGTH: 0.891 INCHES MINIMUM AND 0.953 INCHES MAXIMUM IN
•
TEMP COEFFICIENT OF CAPACITANCE RANGE IN PPM PER DEG CELSIUS: -150.0 TO 150.0 SINGLE SECTION
•
BUSHING WIDTH: 0.215 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
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)
BUSHING LENGTH0.281 INCHES NOMINAL IN
BUSHING DIAMETER0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
BODY STYLEPISTON
OVERALL DIAMETER0.313 INCHES NOMINAL IN
OVERALL LENGTH1.234 INCHES NOMINAL IN
BODY LENGTH0.891 INCHES MINIMUM AND 0.953 INCHES MAXIMUM IN
TEMP COEFFICIENT OF CAPACITANCE RANGE IN PPM PER DEG CELSIUS-150.0 TO 150.0 SINGLE SECTION
BUSHING WIDTH0.215 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
NONDERATED OPERATING TEMP-55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
ADJUSTMENT DEVICE TORQUE1.000 INCH-OUNCES MINIMUM AND 10.000 INCH-OUNCES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
A266Interchangeable
interchangeable cross-reference
interchangeable
V1370Interchangeable
interchangeable cross-reference
interchangeable
V1049 SET OF 4Interchangeable
interchangeable cross-reference
interchangeable
581699-1Interchangeable
Same NIIN cross-reference
interchangeable
V1989Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NMCD643?
NMCD643 is a CAPACITOR,VARIABLE,GLASS DIELECT. It is classified as a MRO (MRO_GENERAL).
What parts can replace NMCD643?
There are 5 known substitutes for NMCD643: A266, V1370, V1049 SET OF 4 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NMCD643?
NMCD643 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-535-9218. 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