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A-1091 — Technical Data Sheet

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— · 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,PLASTIC DIELECTR. Key specifications include head_style: MUSHROOM, stem_style: DRILLED, head_height: 0.1562 INCHES NOMINAL IN, neck_radius: 0.1875 INCHES NOMINAL IN, stem_length: 3.4463 INCHES NOMINAL IN, hole_diameter: 0.1070 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System under NSN 2805-00-353-7584, 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
A-1091
NSN: 2805-00-353-7584
FSC: 2805
CAGE: 77576 — STERLING DIV FEDERAL MOGUL CORP (USA)
SPECIFICATIONS
head_styleMUSHROOM
stem_styleDRILLED
head_height0.1562 INCHES NOMINAL IN
neck_radius0.1875 INCHES NOMINAL IN
stem_length3.4463 INCHES NOMINAL IN
hole_diameter0.1070 INCHES NOMINAL IN
stem_diameter0.2475 INCHES NOMINAL IN
chamfer_length0.0469 INCHES NOMINAL IN
outside_diameter0.9687 INCHES NOMINAL IN
seat_angle_in_deg45.0
carbon_relief_grooveNOT INCLUDED
chamfer_angle_in_deg30.0
NSN2805-00-353-7584
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,PLASTIC DIELECTR TITLE COMPONENT PN A-1091 MFR CAPACITOR,FIXED,PLASTI
KEY FEATURES
•
HOLE DIAMETER: 0.1070 INCHES NOMINAL IN
•
HEAD STYLE: MUSHROOM
•
FSC APPLICATION DATA: GASOLINE ENGINE
•
METALLIC HARDNESS RATING AND LOCATION: 40.0 ROCKWELL C MINIMUM TIP
•
STEM STYLE: DRILLED
•
STEM DIAMETER: 0.2475 INCHES NOMINAL IN
•
CHAMFER ANGLE IN DEG: 30.0
•
NECK RADIUS: 0.1875 INCHES NOMINAL 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
HOLE DIAMETER0.1070 INCHES NOMINAL IN
HEAD STYLEMUSHROOM
FSC APPLICATION DATAGASOLINE ENGINE
METALLIC HARDNESS RATING AND LOCATION40.0 ROCKWELL C MINIMUM TIP
STEM STYLEDRILLED
STEM DIAMETER0.2475 INCHES NOMINAL IN
CHAMFER ANGLE IN DEG30.0
NECK RADIUS0.1875 INCHES NOMINAL IN
OUTSIDE DIAMETER0.9687 INCHES NOMINAL IN
SEAT ANGLE IN DEG45.0
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
654851InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
230101InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SCD79F908512-3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
10-2608-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
PD 5100InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7254715InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-1091?
A-1091 is a CAPACITOR,FIXED,PLASTIC DIELECTR.
What parts can replace A-1091?
There are 17 known substitutes for A-1091: 654851, 230101, SCD79F908512-3 and 14 more. Substitute compatibility should be verified for your specific system.
Is A-1091 still available?
A-1091 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: September 2026