N8491 — CAPACITOR,VARIABLE,MICA DIELECTR

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

N8491: CAPACITOR,VARIABLE,MICA DIELECTR.

CAPACITOR,VARIABLE,MICA DIELECTR. Key specifications include material: STEEL COVER, cover_type: TOGGLE SWITCH, overall_width: 4.000 INCHES NOMINAL IN, overall_height: 0.500 INCHES NOMINAL IN, overall_length: 4.000 INCHES NOMINAL IN, style_designator: SQUARE-SIDE MOUNTED. This part is cataloged in the U.S.

Government catalog under NSN 5975-00-284-6652, 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

N8491

NSN: 5975-00-284-6652
FSC: 5975 — Electrical Hardware and Supplies
CAGE: 76655 — PORTER H K CO INC ELECTRICAL DIV AMBRIDGE WORKS (USA)

SPECIFICATIONS

material	STEEL COVER
cover_type	TOGGLE SWITCH
overall_width	4.000 INCHES NOMINAL IN
overall_height	0.500 INCHES NOMINAL IN
overall_length	4.000 INCHES NOMINAL IN
style_designator	SQUARE-SIDE MOUNTED
surface_treatment	ZINC OR CADMIUM COVER
mounting_hole_diameter	0.312 INCHES NOMINAL IN
cover_attachment_method	SCREW AND WASHER
nondefinitive_spec/std_data	D SIZE AND 26 STYLE AND VIII TYPE
cover_mounting_hole_quantity	4
cover_opening_shape_and_quantity	1 RECTANGULAR
NSN	5975-00-284-6652

COMPONENT DIAGRAM

KEY FEATURES

•

SECOND CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES: 3.312 INCHES NOMINAL IN

•

COVER MOUNTING HOLE QUANTITY: 4

•

DISTANCE FROM CENTER OF MOUNTING HOLE TO EDGE ALONG THE LENGTH: 0.344 INCHES NOMINAL IN

•

STYLE DESIGNATOR: SQUARE-SIDE MOUNTED

•

MOUNTING HOLE DIAMETER: 0.312 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

OVERALL HEIGHT	0.500 INCHES NOMINAL IN
SECOND CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES	3.312 INCHES NOMINAL IN
COVER MOUNTING HOLE QUANTITY	4
DISTANCE FROM CENTER OF MOUNTING HOLE TO EDGE ALONG THE LENGTH	0.344 INCHES NOMINAL IN
STYLE DESIGNATOR	SQUARE-SIDE MOUNTED
MOUNTING HOLE DIAMETER	0.312 INCHES NOMINAL IN
OVERALL LENGTH	4.000 INCHES NOMINAL IN
OVERALL WIDTH	4.000 INCHES NOMINAL IN
DISTANCE FROM CENTER OF MOUNTING HOLE TO EDGE ALONG THE WIDTH	0.344 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA	D SIZE AND 26 STYLE AND VIII TYPE

SUBSTITUTES & CROSS-REFERENCES 7

8361Reference document

Same NSN cross-reference

Reference document — Secondary reference

AA59214-8D26Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

RS9Reference document

Same NSN cross-reference

Reference document — Secondary reference

WJ800Reference document

Same NSN cross-reference

Reference document — Secondary reference

800Reference document

Same NSN cross-reference

Reference document — Secondary reference

A-A-59214Reference document

Same NSN cross-reference

Reference document — Identification reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is N8491?

N8491 is a CAPACITOR,VARIABLE,MICA DIELECTR.

What parts can replace N8491?

There are 7 known substitutes for N8491: 8361, AA59214-8D26, RS9 and 4 more. Substitute compatibility should be verified for your specific system.

What is the NSN for N8491?

N8491 is cataloged in the U.S. Government catalog under NSN 5975-00-284-6652. This indicates validated use in U.S. government and defense supply chains.

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N8491 — CAPACITOR,VARIABLE,MICA DIELECTR

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