311-255 — RESISTOR,VARIABLE,NONWIRE WOUND,

✓ Government record, cited

Legrand · MRO · MRO_GENERAL

PRODUCT OVERVIEW

311-255: RESISTOR,VARIABLE,NONWIRE WOUND,.

The Keor SPE Tower from Legrand is a robust and high performance Uninterruptible Power Supply (UPS) designed to deliver exceptional power protection for critical systems. Engineered for small to medium sized businesses, industrial environments, and IT applications, the Keor SPE Tower ensures uninterrupted operation during power outages and safeguards equipment from voltage fluctuations. It delivers a rated power from 750VA to 3000VA, is managed by a microprocessor, is equipped with integrated self-diagnostics and works on cold-start.

This part is cataloged in the U.S. Government catalog under NSN 5905-01-007-1442, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS

MRO→ MRO_GENERAL→ 311-255

NSN: 5905-01-007-1442
NIINs: 010071442, 012805347
FSC: 5905 — Resistor
CAGE: 04901 — BOONTON ELECTRONICS CORPORATION DIV BOONTON ELECTRONICS (USA)

SPECIFICATIONS

body_style	CYLINDRICAL BUSHING MOUNTED
body_length	0.500 INCHES NOMINAL IN
shaft_style	ROUND
shaft_length	1.500 INCHES NOMINAL IN
actuator_type	SINGLE SHAFT
body_diameter	0.750 INCHES NOMINAL IN
shaft_diameter	0.250 INCHES NOMINAL IN
mounting_method	STANDARD BUSHING
section_quantity	1
terminal_location	RADIALLY POSITIONED OVER LESS THAN HALF THE CIRCUMFERENCE
device_design_type	NONTURN AT 9:00 OCLOCKUNABLE TO DECODE
nonturn_device_radius	0.438 INCHES NOMINAL IN
NSN	5905-01-007-1442

COMPONENT DIAGRAM

KEY FEATURES

•

BODY DIAMETER: 0.750 INCHES NOMINAL IN

•

SCREW THREAD QUANTITY PER INCH: 32.0

•

ELECTRICAL RESISTANCE PER SECTION: 5.0 KILOHMS SINGLE SECTION

•

AMBIENT TEMP IN DEG CELSIUS PER SECTION AT ZERO PERCENT RATED POWER: 150.0 SINGLE SECTION

•

SECTION QUANTITY: 1

•

SHAFT DIAMETER: 0.250 INCHES NOMINAL IN

•

NONTURN DEVICE RADIUS: 0.438 INCHES NOMINAL IN

•

BODY STYLE: CYLINDRICAL BUSHING MOUNTED

TECHNICAL CHARACTERISTICS

BODY DIAMETER	0.750 INCHES NOMINAL IN
SCREW THREAD QUANTITY PER INCH	32.0
ELECTRICAL RESISTANCE PER SECTION	5.0 KILOHMS SINGLE SECTION
AMBIENT TEMP IN DEG CELSIUS PER SECTION AT ZERO PERCENT RATED POWER	150.0 SINGLE SECTION
SECTION QUANTITY	1
SHAFT DIAMETER	0.250 INCHES NOMINAL IN
NONTURN DEVICE RADIUS	0.438 INCHES NOMINAL IN
BODY STYLE	CYLINDRICAL BUSHING MOUNTED
MOUNTING METHOD	STANDARD BUSHING
TEMP COEFFICIENT OF RESISTANCE PER SECTION IN PPM PER DEG CELSIUS	-100.0 TO 250.0 SINGLE SECTION

SUBSTITUTES & CROSS-REFERENCES 2

550-5K-2W1 1/2IN. SHAFTReference document

Same NSN cross-reference

Reference document — Secondary reference

WA70603Reference document

Same NSN cross-reference

Reference document — Design control — primary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 311-255?

311-255 is a RESISTOR,VARIABLE,NONWIRE WOUND, manufactured by Legrand. It is classified as a MRO (MRO_GENERAL).

What parts can replace 311-255?

There are 2 known substitutes for 311-255: 550-5K-2W1 1/2IN. SHAFT, WA70603. Substitute compatibility should be verified for your specific system.

What is the NSN for 311-255?

311-255 is cataloged in the U.S. Government catalog under NSN 5905-01-007-1442. This indicates validated use in U.S. government and defense supply chains.

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311-255 — RESISTOR,VARIABLE,NONWIRE WOUND,

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