3981 — CAPACITOR,VARIABLE,AIR DIELECTRI

✓ Government record, cited

— · MRO · MRO_GENERAL

PRODUCT OVERVIEW

3981: CAPACITOR,VARIABLE,AIR DIELECTRI.

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include material: SILICON SEMICONDUCTOR, bore_shape: STRAIGHT, cone_width: 1.1830 INCHES NOMINAL IN, shaft_type: ROUND SINGLE SHAFT, flange_width: 0.0420 INCHES NOMINAL IN, shaft_length: 0.343 INCHES NOMINAL SINGLE SHAFT IN. This part is cataloged in the U.S.

Government catalog under NSN 4520-00-068-0294, 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→ 3981

NSN: 4520-00-068-0294
NIINs: 000680294, 001003114, 001462316, 002938392, 007524334, 007525701, 016066140
FSC: 4520 — Space and Water Heating Equipment
CAGE: 02728 — MANUFACTURER'S COMMERCIAL FINANCE, LLC DBA ELECTRO-FLEX HEAT (USA)

SPECIFICATIONS

material	SILICON SEMICONDUCTOR
bore_shape	STRAIGHT
cone_width	1.1830 INCHES NOMINAL IN
shaft_type	ROUND SINGLE SHAFT
flange_width	0.0420 INCHES NOMINAL IN
shaft_length	0.343 INCHES NOMINAL SINGLE SHAFT IN
thread_class	2B
bore_diameter	0.1875 INCHES NOMINAL IN
inclosure_type	UNINCLOSED
load_direction	RADIAL
overall_length	5.273 INCHES NOMINAL IN
surface_finish	GROUND
NSN	4520-00-068-0294

COMPONENT DIAGRAM

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

SUBSTITUTES & CROSS-REFERENCES 3

4310Reference document

Same NSN cross-reference

Reference document — Secondary reference

123-39Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

254-102Reference document

Same NSN cross-reference

Reference document — Design control — primary reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

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

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FREQUENTLY ASKED QUESTIONS

What is 3981?

3981 is a CAPACITOR,VARIABLE,AIR DIELECTRI. It is classified as a MRO (MRO_GENERAL).

What parts can replace 3981?

There are 3 known substitutes for 3981: 4310, 123-39, 254-102. Substitute compatibility should be verified for your specific system.

What is the NSN for 3981?

3981 is cataloged in the U.S. Government catalog under NSN 4520-00-068-0294. This indicates validated use in U.S. government and defense supply chains.

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3981 — CAPACITOR,VARIABLE,AIR DIELECTRI

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