SM3-20-120-400-57

Technical Characteristics

• Case Material

  metal

• Center To Center Distance Between Terminals Parallel To Length

  0.870 inches minimum and 0.880 inches maximum

• Mounting Surface To Terminal End Distance

  1.524 inches minimum and 1.586 inches maximum

• Pole Quantity

  1

• Arc Quenching Method

  magnetic blowout

• Mounting Facility Type And Quantity

  1 threaded bushing w/panel seal

• Storage Type

  general purpose warehouse

• Thread Quantity Per Inch

  32

• Maximum Continuous Load Current Rating Per Pole

  20.0 amperes ac

• Operating Voltage Type And Rating Per Pole In Volts

  120.0 ac

• Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps

  20.0 ac

• Trip Release Method

  magnetic

• Internal Trip Release Configuration

  series trip

• Nominal Thread Size

  0.375 inches

• Trip Delay Time In Seconds Per Rated Continuous Current

  6.000 minimum at 125 pct and 30.000 maximum at 125 pct

• Inclosure Protection Type For Which Designed

  moisture resistant and fungus resistant

• Thread Series Designator

  unef

• Terminal Type And Quantity

  2 wire hook

• Bushing Length

  0.360 inches minimum and 0.380 inches maximum

• Body Length

  1.448 inches minimum and 1.510 inches maximum

• Body Width

  0.567 inches minimum and 0.629 inches maximum

• Fragility Factor

  moderately rugged

• Circuit Protection Type

  overcurrent

• Trip Release Characteristic

  time delay

• Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent

  125.0

• Reset Method

  manual

• Main Contact Tripping Mechanism Type

  trip free

• Manual Actuator Type And Quantity

  1 toggle

• Actuator Function

  trip-reset

• Actuator Position Designation

  at pole one

• Frequency In Hertz

  400.0