Model: ST18-S179A

Pre Wire Wound Variable Resistor

Properties:

Section Quantity
4
Body Style
Cylindrical servo mounted
Reliability Indicator
Not established
Pilot Diameter
Between 0.49500 inches and 0.50500 inches
Pilot Length
Between 0.10900 inches and 0.14100 inches
Overall Length
4.485 inches
Undercut Diameter
1.625 inches
Undercut Width
0.07300 inches
Body Diameter
1.755 inches
Angle Of Mounting Hole In Deg
90.0
Angle Between Centerlines Of Mounting Holes In Deg
90.0
Shaft Diameter
0.250 inches
Shaft Length
Between 1.984 inches and 2.016 inches
Body Length
2.485 inches
Overall Diameter
2.156 inches
Mounting Lip Diameter
1.75500 inches
Mounting Lip Depth
0.09300 inches
Mounting Hole/stud Circle Diameter
Between 0.870 inches and 0.880 inches
Shaft Style
Round, slotted
Shaft Bearing Type
Ball
Actuator Type
Single shaft
Effective Electrical Rotation In Deg Angular Rotation
350.0
Maximum Starting Torque
4.50 inch-ounces
Maximum Running Torque
2.00 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
Features Provided
Humidity proof
Electrical Resistance Per Section
500.000 ohms c and better v.G. Stepping
Electrical Resistance Per Section
80.000 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
Rotary Actuator Travel In Angular Deg
360.0
Function Conformity Tolerance Per Section
-0.20/+0.20 all sections
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 terminal base linearity
Resistance Tolerance Per Section In Percent
-1.0/+1.0 1st section
Resistance Tolerance Per Section In Percent
-1.0/+1.0 2nd section
Resistance Tolerance Per Section In Percent
-1.0/+1.0 3rd section
Resistance Tolerance Per Section In Percent
-5.0/+5.0 4th section
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
Precious Material And Location
Terminals gold and terminals silver
Precious Material
Gold and silver
Terminal Type And Quantity
12 solder stud
NSN
5905-00-755-3253
Part Number
ST18-S179A
Description
Resistor,variable,wire Wound,pre
CAGE
10112

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 ST18-S179A NSN 5905-00-755-3253

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:
G
ESD:
A
ESD:
A
MMAC:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.3000lbs
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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