21EN51-S

Technical Characteristics

• Actuator Free Position Height

  1.751 inches minimum and 1.811 inches maximum

• Overall Length

  3.316 inches nominal

• Thread Series Designator

  unef

• Body Style

  bushing mounted

• Body Diameter

  1.000 inches nominal

• Nonpile-Up Contact Arrangement

  2 pole, single throw, normally closed, momentary action single switch unit

• Body Length

  1.505 inches maximum

• Actuator Style

  roller plunger

• Bushing Length

  0.627 inches minimum and 0.687 inches maximum

• Case Material

  metal

• Maximum Voltage Rating In Volts

  115.0 ac and 28.0 dc

• Actuator Movement

  0.250 overtravel inches minimum and 0.040 pretravel inches maximum and 0.020 differential inches maximum

• Nominal Thread Size

  0.625 inches

• Inclosure Type

  fully inclosed

• Actuator Roller Width

  0.125 inches nominal

• Hazardous Locations/Environmental Protection

  corrosion resistant

• Contact Load Current Rating At Maximum Rated Voltage

  5.000 amperes resistive ac and 4.000 amperes motor dc and 24.000 amperes lamp dc and 3.000 amperes inductive dc and 5.000 amperes resistive dc and 5.000 amperes inductive ac

• Switch Actuating Force

  48.0 ounces minimum and 96.0 ounces maximum

• Switch Release Force

  32.0 ounces minimum

• Terminal Type And Quantity

  4 tab w/screw

• Overall Width

  1.000 inches nominal

• Actuator Roller Diameter

  0.500 inches nominal

• Overall Height

  1.000 inches nominal

• Mounting Method

  threaded bushing