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Technical Data Sheet
PartsTable / MRO / 3B661-204A
3B661-204A ✓ 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,FIXED,PAPER DIELECTRIC. Key specifications include body_style: W/MTG TABS/FLANGES, TERMINAL(S) ON ONE SURFACE, body_width: 1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM IN, body_height: 1.060 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN, body_length: 1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM IN, terminal_length: 0.750 INCHES NOMINAL IN, reliability_indicator: NOT ESTABLISHED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-01-231-2421, 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→ 3B661-204A
NSN: 5910-01-231-2421
FSC: 5910
CAGE: 58364 — BYCAP INC (USA)
SPECIFICATIONS
body_styleW/MTG TABS/FLANGES, TERMINAL(S) ON ONE SURFACE
body_width1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM IN
body_height1.060 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
body_length1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM IN
terminal_length0.750 INCHES NOMINAL IN
reliability_indicatorNOT ESTABLISHED
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM DEGC
terminal_surface_treatmentSOLDER
terminal_type_and_quantity2 TAB, SOLDER LUG
schematic_diagram_designatorNO COMMON OR GROUNDED ELECTRODE(S)
capacitance_value_per_section0.100 MICROFARADS SINGLE SECTION
unthreaded_mounting_hole_diameter0.190 INCHES NOMINAL IN
NSN5910-01-231-2421
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,PAPER DIELECTRIC TITLE COMPONENT PN 3B661-204A MFR CAPACITOR,FIXED,PAPER
KEY FEATURES
•
CAPACITANCE VALUE PER SECTION: 0.100 MICROFARADS SINGLE SECTION
•
UNTHREADED MOUNTING HOLE DIAMETER: 0.190 INCHES NOMINAL IN
•
SCHEMATIC DIAGRAM DESIGNATOR: NO COMMON OR GROUNDED ELECTRODE(S)
•
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION: 660.0 AC-RMS SINGLE SECTION
•
TERMINAL LENGTH: 0.750 INCHES NOMINAL IN
•
BODY LENGTH: 1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM IN
•
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY LENGTH: 2.350 INCHES MINIMUM AND 2.410 INCHES MAXIMUM IN
•
MOUNTING FACILITY TYPE AND QUANTITY: 2 UNTHREADED MOUNTING HOLES
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)
CAPACITANCE VALUE PER SECTION0.100 MICROFARADS SINGLE SECTION
UNTHREADED MOUNTING HOLE DIAMETER0.190 INCHES NOMINAL IN
SCHEMATIC DIAGRAM DESIGNATORNO COMMON OR GROUNDED ELECTRODE(S)
NONDERATED CONTINUOUS VOLTAGE RATING AND TYPE PER SECTION660.0 AC-RMS SINGLE SECTION
TERMINAL LENGTH0.750 INCHES NOMINAL IN
BODY LENGTH1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM IN
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY LENGTH2.350 INCHES MINIMUM AND 2.410 INCHES MAXIMUM IN
MOUNTING FACILITY TYPE AND QUANTITY2 UNTHREADED MOUNTING HOLES
BODY HEIGHT1.060 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
CENTER TO CENTER DISTANCE BETWEEN TERMINALS PARALLEL TO LENGTH1.000 INCHES MINIMUM AND 1.120 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
3905Interchangeable
interchangeable cross-reference
interchangeable
72-6970-960Interchangeable
interchangeable cross-reference
interchangeable
M83248/1-905Interchangeable
interchangeable cross-reference
interchangeable
924284C1Interchangeable
interchangeable cross-reference
interchangeable
5715MKInterchangeable
interchangeable cross-reference
interchangeable
F400E00303Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3B661-204A?
3B661-204A is a CAPACITOR,FIXED,PAPER DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 3B661-204A?
There are 19 known substitutes for 3B661-204A: 3905, 72-6970-960, M83248/1-905 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3B661-204A?
3B661-204A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-01-231-2421. 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