RWR81SR255FR

View detailed technical data, stock status, and sourcing information for: RWR81SR255FR
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Federal Supply Group

Electrical and Electronic Equipment Components

Federal Supply Classification

5905 Resistor

National Stock Number

5905-01-158-8967

Item Name Code

37403

Assigment Date

07/30/1983 (42 years ago)

A resistor whose ohmic value cannot be adjusted or varied. The resistance element consists of high resistance wire (or ribbon) either wound on an insulated form or constructed so as to be self-supporting. The item must have inherent characteristics of inducing self-inductance. Opposition to current flow is an inherent property of the resistance wire and is manifested by the heat dissipation in the resistor. Exclut s suppressor, ignition interference. See also resistor (1), fixed, wire wound, noninductive.

0.255 ohms electrical resistance, -1.000 to 1.000 resistance tolerance in percent, established reliability indicator, 275.0 ambient temp in deg celsius at zero percent rated power, -55.0 to 275.0 temp range of temp coefficient in deg celsius

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Electrical Resistance: 0.255 ohms
Resistance Tolerance In Percent: -1.000 to 1.000
Ambient Temp In Deg Celsius At Zero Percent Rated Power: 275.0
Temp Range Of Temp Coefficient In Deg Celsius: -55.0 to 275.0
Reliability Indicator: established
Reliability Failure Rate Level In Percent: 0.001
Terminal Length: 1.500 inches minimum
Body Diameter: 0.065 inches minimum and 0.105 inches maximum
Body Length: 0.219 inches minimum and 0.281 inches maximum
Power Dissipation Rating In Watts: 1.000 free air
Ambient Temp At Full Rated Power: 25.0 celsius
Inclosure Type: encapsulated
Cubic Measure: 0.001 cubic inches
Terminal Type: wire lead
Special Features: temperature coefficient not to exceed plus 650 ppm
Unpackaged Unit Weight: 0.35 grams
Style Designator: axial terminal each end
Test Data Document: "81349-mil-r-39007 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."
Specification/Standard Data: 81349-mil-r-39007/9 government specification

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5905-00-525-3456	No Name Available	06/28/2016

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
4171530-808	Resistor,fixed,wire Wound,induct
RWR81SR255FR	Resistor,fixed,wire Wound,induct
RWR81SR255FS	Resistor,fixed,wire Wound,induct

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5905-01-158-8967?

The FSCG of the NSN 5905-01-158-8967 is 5905

Does the NSN 5905-01-158-8967 have a Schedule B code assigned?

Yes, the Schedule B code is 8533390080

Does NSN 5905-01-158-8967 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5905-01-158-8967 contain precious materials?

Item does not contain precious metal.

Does NSN 5905-01-158-8967 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5905-01-158-8967 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Sat, Jul 30, 1983