78-144-1

Technical Characteristics

• Body Width

  1.875 inches maximum

• Maximum Continuous Load Current Rating Per Pole

  2.0 amperes dc first location

• Thread Series Designator

  unef

• Bushing Length

  0.375 inches nominal

• Arc Quenching Method

  magnetic blowout

• Maximum Continuous Load Current Rating Per Pole

  3.0 amperes dc second location

• Main Contact Tripping Mechanism Type

  trip free

• Actuator Position Designation

  between pole one and two

• Body Length

  1.500 inches maximum

• Manual Actuator Type And Quantity

  1 toggle

• Case Material

  metal

• Body Style

  multipole-single actuator type

• Center To Center Distance Between Terminals Parallel To Length

  0.875 inches nominal

• Terminal Type And Quantity

  4 wire hook

• Inclosure Protection Type For Which Designed

  hermetically sealed

• Mounting Surface To Terminal End Distance

  1.780 inches maximum

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

  125.0 all locations

• Trip Release Method

  magnetic all locations

• Thread Quantity Per Inch

  32

• Nominal Thread Size

  0.375 inches

• Operating Voltage Type And Rating Per Pole In Volts

  50.0 dc all locations

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

  500.0 dc all locations

• Internal Trip Release Configuration

  series trip all locations

• Actuator Function

  trip-reset

• Center To Center Distance Between Terminals Parallel To Width

  0.625 inches nominal

• Trip Release Characteristic

  time delay all locations

• Storage Type

  general purpose warehouse

• Trip Delay Time In Seconds Per Rated Continuous Current

  0.055 minimum at 200 pct all locations and 0.950 maximum at 200 pct all locations

• Mounting Facility Type And Quantity

  1 threaded bushing w/panel seal

• Reset Method

  manual

• Pole Quantity

  2

• Circuit Protection Type

  overcurrent all locations

• Special Handling Feature

  magnetic

• Fragility Factor

  moderately rugged