21-578

Technical Characteristics

• Overall Height

  2.688 inches nominal

• Terminal Type And Quantity

  6 threaded stud all functions

• Mounting Facility Type And Quantity

  4 unthreaded hole single mounting facility

• Mounting Facility Pattern

  rectangular single mounting facility

• Overall Width

  3.500 inches nominal

• Unthreaded Mounting Hole Diameter

  0.172 inches nominal single mounting facility

• Overall Length

  3.876 inches nominal

• Winding Quantity

  1

• Frequency In Hertz

  50.0 nominal or 400.0 nominal

• Nonpile-Up Main Contact Arrangement

  1 pole, single throw, normally open, momentary action and 1 pole, single throw, normally closed, momentary action

• Main Contact Maximum Voltage Rating In Volts

  120.0 ac and 30.0 dc

• Special Features

  screw drop-out trip adjustment

• Coil Quantity

  1

• Operating Voltage Rating And Type At Specified Temp

  120.0 volts -80 deg fahrenheit type 4f single winding

• Center To Center Distance Between Mounting Facilities Parallel To Length

  3.500 inches nominal single mounting facility

• Duty Type

  continuous

• Center To Center Distance Between Mounting Facilities Parallel To Width

  2.750 inches nominal single mounting facility

• Environmental Protection

  shock resistant and hermetic

• Main Contact Load Current Rating At Maximum Rated Voltage

  10.0 amperes ac resistive load and 10.0 amperes dc resistive load