Model: RBR56L257R7BR

Nonind Wire Wound Fixed Resistor

Properties:

Tempurature Coefficient Of Resistance In Ppm Per Deg Celsius
-10.0/+10.0
Electrical Resistance
257.700 ohms
Resistance Tolerance In Percent
-0.100/+0.100
Resistance Tolerance In Percent
-0.100 to 0.100
Ambient Tempurature In Deg Celsius At Full Rated Power
125.0
Ambient Tempurature In Deg Celsius At Zero Percent Rated Power
145.0
Tempurature Range Of Tempurature Coefficient In Deg Celsius
-65.0/+145.0
Inclosure Method
Encapsulated
Terminal Type
Wire lead
Reliability Indicator
Established
Reliability Failure Rate Level In Percent
0.010
Terminal Length
1.500 inches
Body Diameter
Between 0.235 inches and 0.265 inches
Body Length
Between 0.312 inches and 0.364 inches
Power Dissipation Rating In Watts
0.125 free air
Cubic Measure (non-core)
0.020 cubic inches
Unpackaged Unit Weight
1.5 grams
Style Designator
Axial terminal each end
Test Data Document
81349-mil-r-39005 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", "", etc.).
Specification Data
81349-mil-r-39005/5 government specification
NSN
5905-00-189-2350
Part Number
RBR56L257R7BR
Description
Resistor,fixed,wire Wound,nonind
CAGE
81349

Inc 37404 reinstated on 010303~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 items must have inherent characteristics of inducing little or no self-inductance. Opposition to current flow is an inherent property of the resistance wire and is manifested by the heat dissipation in the resistor. Excludes suppressor, ignition interference. See also resistor (1), fixed, wire wound, inductive.

Part RBR56L257R7BR NSN 5905-00-189-2350

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
37404
FIIG:
A001A0
Concept No.:
1
App. Key:
B
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
A
ESD:
A
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
ZZ
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
062960
UFC:
35140
LTL:
77.5
LCL:
--
WCC:
658
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8533390080
  • SITC: 77233
  • End Use: Electric apparatus
  • NAICS: 334416
  • USDA: 1

Freight Class: Wirewound variable resistors, nesoi

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