wilbrecht electronics: switches: model 400 potentiometer                                                  contact us       about us

 

 

Product Data

Model 400 Potentiometer

 

 

 

 

Special Features

  • English and Metric Versions
  • Wave solderable
  • Choice of shaft length
  • 8 standard electrical tapers
    (custom tapers also available)
  • Flatted or round shafts standard
  • Plastic shaft, bushing and case
  • Over 750,000 different standard
    models

 

Sealed to withstand wave soldering and common printed circuit board cleaning processes, the Model 400 potentiometer/switch will withstand 260ºC for 5 seconds.  It is corrosion resistant and constructed from non-magnetic materials.

 

 

 

 

Wilbrecht Electronics has been successfully manufacturing high reliability ultraminiature volume controls, trimming potentiometer and switches for over 35 years.

 

 

 

 

 

 

 

 

 

 

Standard Electrical Tapers

PERCENT CLOCKWISE ELECTRICAL ROTATIONS
(Viewed From Shaft Side)

Regardless of the direction of the taper curve, the switch can be placed at either the clockwise or the counterclockwise end of the rotation.

Even numbered curves reference terminals 1 and 2 (front section) or 4 and 5 (rear section).  Odd numbered curves reference terminals 2 and 3 (front section) or 4 and 5 (rear section).

Standard tolerances for curves #0, 1, 2, 3, 4, and 5 are ± 20% for the overall value and ± 20% for the mid-point value.  For curves #6 and 7, ± 40% is standard for the overall value and ± 20% for the mid-point.
 

    SPECIFICATIONS


Switch Contact Resistance
Travel
Stop Strength
Rotating Torque
Bushings
Terminals
Temperature Range
Total Resistance Range
Total Resistance Tolerance
Tapers
End Resistance
Rotation Life
Power
Stability - Humidity
Insulation Resistance
Switch

 

50 mohms maximum
Total = 300°, Electrical = 250°; Switch = 20°
2 inch pounds maximum
0.24 inch ounces to 3.0 inch ounces
See drawing
Precious metal plated brass - see drawing
-25°C to + 100°C
2.2K ohms to 1000K ohms
+/-20% Standard*
Tapers
10 ohms maximum
25,000 cycles minimum; 10% maximum charge in resistance
0.10 watts
10% maximum change in total resistance (96 Hours, 40°C, 95% R.H.)
1,000 megohms minimum
Single pole, double throw wiping contracts, switching occurs at
counterclockwise end of rotation only in rear module; switching occurs at clockwise end of only in front (closest to bushing) module

*Contract the factory for special requirements


The quality program in our Huron, South Dakota factory, where these parts are manufactured, meets or exceeds MIL-Q-9858A.

Copyright 2001 - Wilbrecht Electronics Inc.