Model: 28W3-2157

Pre Wire Wound Variable Resistor

Properties:

Section Quantity
3
Body Style
Cylindrical hole/slot mounted
Reliability Indicator
Not established
Body Diameter
1.755 inches
Shaft Diameter
0.250 inches
Shaft Length
1.312 inches
Body Length
1.902 inches
Mounting Hole/stud Circle Diameter
0.875 inches
Shaft Style
Round, slotted
Actuator Type
Single shaft
Effective Electrical Rotation In Deg Angular Rotation
350.0
Maximum Starting Torque
3.50 inch-ounces
Maximum Running Torque
1.50 inch-ounces
Shaft Runout
0.001 inches
Screw Thread Diameter
0.138 inches
Screw Thread Series Designator
Unc
Screw Thready Qty Per Inch (tpi)
32.0
Mounting Facility Quantity
4
Terminal Location
Radially positioned over less than half the circumference
Mounting Method
Threaded hole
Electrical Resistance Per Section
50.000 percent, rated amperes c and better finish
Electrical Resistance Per Section
80.000 percent, rated amperes c and better industrial clears
Electrical Resistance Per Section
80.000 percent, rated amperes c and better select
Tap Location From Ccw Terminal Per Section In Deg Of Effective Electrical Rotation
180.0 all sections
Rotary Actuator Travel In Angular Deg
360.0
Function Conformity Tolerance Per Section
-0.15/+0.15 3rd section
Function Conformity Tolerance Per Section
-0.20/+0.20 1st section
Function Conformity Tolerance Per Section
-0.20/+0.20 2nd section
Ambient Tempurature In Deg Celsius Per Section At Zero Percent Rated Power
150.0 all sections
Power Dissipation Rating Per Section In Watts
2.0 free air all sections
Function Conformity Per Section
All sections independent linearity
Fixed Tap Quantity Per Section
1 all sections
Resistance Tolerance Per Section In Percent
-5.0/+5.0 all sections
Actuator Travel Control Feature
Continuous motion
Function Characteristic Per Section
All sections linear
Tempurature Coefficient Of Resistance Wire Per Section In Ppm Per Deg Celsius
-20.0/+20.0 all sections
Ambient Tempurature In Deg Celsius Per Section At Full Rated Power
85.0 all sections
Terminal Type And Quantity
12 tab, solder lug
NSN
5905-00-755-0739
Part Number
28W3-2157
Description
Resistor,variable,wire Wound,pre
CAGE
19176

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 28W3-2157 NSN 5905-00-755-0739

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:
U
ESD:
B
ESD:
B
MMAC:
EH
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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