Model: 55-50-238B

Pre Wire Wound Variable Resistor

Properties:

Section Quantity
1
Body Style
Cylindrical bushing mounted
Reliability Indicator
Not established
Overall Length
1.859 inches
First Flat Length
0.497 inches
Flat Height
0.218 inches
Body Diameter
0.875 inches
Shaft Diameter
Between 0.248 inches and 0.250 inches
Shaft Length
0.875 inches
Mounting Bushing Length
0.250 inches
Body Length
0.984 inches
Overall Diameter
1.188 inches
Shaft Style
Round, flatted
Shaft Bearing Type
Bearing
Switch Type
Sensitive
Switch Voltage Rating In Volts
28.0
Actuator Type
Single shaft
Effective Electrical Rotation In Deg Angular Rotation
270.0
Maximum Stop Torque
400.00 inch-ounces
Nonturn Device Location
At 3 oclock
Nonturn Device Radius
0.375 inches
Switch Operating Position
Start of rotation
Switch Contact Arrangement
Spdt 2 circuit switch
Fragility Factor
Rugged
Screw Thread Diameter
0.375 inches
Screw Thread Series Designator
Unef
Screw Thready Qty Per Inch (tpi)
32.0
Terminal Location
Radially positioned over more than half the circumference
Mounting Method
Standard bushing w/shaft seal
Features Provided
Switch
Electrical Resistance Per Section
5.0 kilohms single section
Rotary Actuator Travel In Angular Deg
300.0
Function Conformity Tolerance Per Section
-1.00/+1.00 single section
Ambient Tempurature In Deg Celsius Per Section At Zero Percent Rated Power
135.0 single section
Power Dissipation Rating Per Section In Watts
4.0 free air single section
Function Conformity Per Section
Single section independent linearity
Resistance Tolerance Per Section In Percent
-5.0/+5.0 single section
Actuator Travel Control Feature
Stops
Function Characteristic Per Section
Single section linear
Ambient Tempurature In Deg Celsius Per Section At Full Rated Power
40.0 single section
Switch Current Type And Rating In Amps
5.000 dc
Test Data Document
76301-5-1680 drawing (this is the basic governing drawing, such as a contractor drawing, original equipment manufacturer drawing, etc.; excludes any specification, standard or other document that may be referenced in a basic governing drawing)
Terminal Type And Quantity
4 tab, solder lug and 3 turret
NSN
5905-01-125-5786
Part Number
55-50-238B
Description
Resistor,variable,wire Wound,pre
CAGE
18065

A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. The functional tolerance (linearity) of the output is equal to or less than plus or munus 1 percent on linear outputs. Specified outputs such as sine, cosine, tangent, etc., shall be considered to be precision. For items having manually positioned taps designed to be set and fixed prior to use, see resistor, adjustable, for items with step by step variation, see rheostat and resistor, step by step. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see attenuator, variable. Excludes resistor (1), variable, nonwire wound, nonprecision; resistor (1), variable, nonwire wound, precision; and resistor (1), variable, wire wound, nonprecision.

Part 55-50-238B NSN 5905-01-125-5786

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
37408
FIIG:
A002A0
Concept No.:
1
App. Key:
D
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:
A
ESD:
B
ESD:
B
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.6000lbs
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:
72D
TCC:
3
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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