Precision Wire Wound Variable Resistor

Part Number ST18-S180A

Quality inspected with certificate of conformity. For questions and pricing call us at +1 210-468-8090

We ship worldwide

Features

5.344 inches nominal overall length.

Switch.

Includes quality control certificate of conformance.

Specifications

  • Section Quantity:
    5
  • Body Style:
    Cylindrical servo mounted
  • Reliability Indicator:
    Not established
  • Pilot Diameter:
    Between 0.4950 inches and 0.5050 inches
  • Pilot Length:
    0.1250 inches
  • Undercut Diameter:
    1.750 inches
  • Undercut Width:
    0.0730 inches
  • Body Diameter:
    1.755 inches
  • Angle Of Mounting Hole In Deg:
    90.0
  • Angle Between Centerlines Of Mounting Holes In Deg:
    120.0
  • Shaft Diameter:
    0.250 inches
  • Shaft Length:
    Between 0.109 inches and 0.141 inches
  • Body Length:
    4.219 inches
  • Overall Diameter:
    2.002 inches
  • Mounting Lip Diameter:
    2.0620 inches
  • Mounting Lip Depth:
    0.0930 inches
  • Mounting Hole/stud Circle Diameter:
    Between 0.870 inches and 0.880 inches
  • Shaft Style:
    Round, slotted
  • Shaft Bearing Type:
    Ball
  • Switch Type:
    Rotary
  • Switch Voltage Rating In Volts:
    35.0 and 250.0 and 250.0
  • Actuator Type:
    Single shaft
  • Effective Electrical Rotation In Deg Angular Rotation:
    350.0
  • Maximum Starting Torque:
    6.50 inch-ounces
  • Maximum Running Torque:
    4.00 inch-ounces
  • Shaft Runout:
    0.001 inches
  • Switch Operating Position:
    Start of linear movement
  • Switch Contact Arrangement:
    Single pole, single throw, normally open, both positions maintained
  • 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:
    Switch
  • Electrical Resistance Per Section:
    4.000 percent, rated amperes c and better v.G. Stepping
  • Electrical Resistance Per Section:
    4.000 percent, rated amperes c drop siding
  • 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:
    175.0 all sections
  • Rotary Actuator Travel In Angular Deg:
    360.0
  • Function Conformity Tolerance Per Section:
    -0.30/+0.30 all sections
  • Tempurature Coefficient Of Resistance Per Section In Ppm Per Deg Celsius:
    -20.0/+20.0 all sections
  • Power Dissipation Rating Per Section In Watts:
    2.0 free air all sections
  • Function Conformity Per Section:
    All sections terminal base linearity
  • Fixed Tap Quantity Per Section:
    1 1st section
  • Fixed Tap Quantity Per Section:
    1 2nd section
  • Fixed Tap Quantity Per Section:
    1 3rd section
  • Fixed Tap Quantity Per Section:
    1 4th section
  • Fixed Tap Quantity Per Section:
    1 5th section
  • Resistance Tolerance Per Section In Percent:
    -5.0/+5.0 all sections
  • Actuator Travel Control Feature:
    Continuous motion
  • Tap Location From Ccw Terminal Per Section In Ohms:
    2000.0 4th section
  • Tap Location From Ccw Terminal Per Section In Ohms:
    2000.0 5th section
  • Tap Location From Ccw Terminal Per Section In Ohms:
    25000.0 1st section
  • Tap Location From Ccw Terminal Per Section In Ohms:
    40000.0 2nd section
  • Tap Location From Ccw Terminal Per Section In Ohms:
    40000.0 3rd section
  • Function Characteristic Per Section:
    All sections linear
  • Ambient Tempurature In Deg Celsius Per Section At Full Rated Power:
    85.0 all sections
  • Switch Current Type And Rating In Amps:
    0.500 dc and 0.001 dc and 0.010 dc
  • Terminal Type And Quantity:
    26 tab, solder lug
  • Federal Supply Class (fsc):
    Resistors
  • National Stock Number (nsn):
    5905-00-755-0828
  • Special Features:
    3 switch sections

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