18955 — CAPACITOR,VARIABLE,AIR DIELECTRI

✓ Government record, cited

— · MRO · MRO_GENERAL

PRODUCT OVERVIEW

18955: CAPACITOR,VARIABLE,AIR DIELECTRI.

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include width: 26.0 CENTIMETERS NOMINAL CM, length: 30.5 CENTIMETERS NOMINAL CM, material: COPPER ALLOY, body_style: PLATE-MESHING, body_height: 0.320 INCHES NOMINAL IN, body_diameter: 0.578 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5910-00-439-5637, 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→ 18955

NSN: 5910-00-439-5637
NIINs: 004395637, 009552258, 012365006, 015790355
FSC: 5910 — Capacitors
CAGE: 71313 — VIKING TECHNOLOGIES, LTD. (USA)

SPECIFICATIONS

width	26.0 CENTIMETERS NOMINAL CM
length	30.5 CENTIMETERS NOMINAL CM
material	COPPER ALLOY
body_style	PLATE-MESHING
body_height	0.320 INCHES NOMINAL IN
body_diameter	0.578 INCHES NOMINAL IN
overall_width	0.421 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN
plate_air_gap	0.010 INCHES IN
terminal_type	TAB, SOLDER LUG
inclosure_type	UNINCLOSED
overall_height	0.350 INCHES NOMINAL IN
overall_length	1.200 INCHES NOMINAL IN
NSN	5910-00-439-5637

COMPONENT DIAGRAM

KEY FEATURES

•

PLATE AIR GAP: 0.010 INCHES IN

•

MOUNTING FACILITY TYPE AND QUANTITY: 2 UNTHREADED HOLE(S)

•

NONDERATED VOLTAGE RATING AND TYPE: 650.0 AC PEAK SINGLE SECTION

•

INCLOSURE TYPE: UNINCLOSED

•

TEMP COEFFICIENT OF CAPACITANCE IN PPM PER DEG CELSIUS: 45.0 SINGLE SECTION

•

FRAGILITY FACTOR: MODERATELY RUGGED

•

CAPACITANCE DRIFT IN PICOFARADS: 0.04 SINGLE SECTION

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

PLATE AIR GAP	0.010 INCHES IN
MOUNTING FACILITY TYPE AND QUANTITY	2 UNTHREADED HOLE(S)
OVERALL HEIGHT	0.441 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
NONDERATED VOLTAGE RATING AND TYPE	650.0 AC PEAK SINGLE SECTION
INCLOSURE TYPE	UNINCLOSED
TEMP COEFFICIENT OF CAPACITANCE IN PPM PER DEG CELSIUS	45.0 SINGLE SECTION
FRAGILITY FACTOR	MODERATELY RUGGED
CAPACITANCE DRIFT IN PICOFARADS	0.04 SINGLE SECTION
BODY STYLE	PLATE-MESHING
INSULATION DC RESISTANCE AT 25 DEG CELSIUS	100000.0 MEGOHMS

SUBSTITUTES & CROSS-REFERENCES 3

189-0005-005Reference document

Same NSN cross-reference

Reference document — Secondary reference

281-0080-00Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

189-0505-075Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 18955?

18955 is a CAPACITOR,VARIABLE,AIR DIELECTRI. It is classified as a MRO (MRO_GENERAL).

What parts can replace 18955?

There are 3 known substitutes for 18955: 189-0005-005, 281-0080-00, 189-0505-075. Substitute compatibility should be verified for your specific system.

What is the NSN for 18955?

18955 is cataloged in the U.S. Government catalog under NSN 5910-00-439-5637. This indicates validated use in U.S. government and defense supply chains.

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18955 — CAPACITOR,VARIABLE,AIR DIELECTRI

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