78-138-3

Technical Characteristics

• Body Length

  1.500 inches maximum

• Case Material

  metal

• Center To Center Distance Between Terminals Parallel To Width

  0.625 inches nominal

• Fragility Factor

  moderately rugged

• Mounting Surface To Terminal End Distance

  1.780 inches maximum

• Arc Quenching Method

  magnetic blowout

• Storage Type

  general purpose warehouse

• Thread Quantity Per Inch

  32

• Maximum Continuous Load Current Rating Per Pole

  2.25 amperes ac

• Operating Voltage Type And Rating Per Pole In Volts

  250.0 ac

• Trip Release Method

  magnetic-hydraulic

• Reset Method

  manual

• Main Contact Tripping Mechanism Type

  trip free

• Manual Actuator Type And Quantity

  1 toggle

• Actuator Position Designation

  between pole one and two

• Internal Trip Release Configuration

  series trip

• Nominal Thread Size

  0.375 inches

• Thread Series Designator

  unef

• Bushing Length

  0.375 inches nominal

• Body Width

  1.250 inches maximum

• Center To Center Distance Between Terminals Parallel To Length

  0.875 inches nominal

• Pole Quantity

  2

• Mounting Facility Type And Quantity

  1 threaded bushing w/panel seal

• Special Handling Feature

  magnetic

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

  300.0 ac

• Circuit Protection Type

  overcurrent

• Trip Release Characteristic

  time delay

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

  150.0

• Actuator Function

  trip-reset

• Trip Delay Time In Seconds Per Rated Continuous Current

  1.500 minimum at 200 pct and 4.000 maximum at 200 pct

• Inclosure Protection Type For Which Designed

  dustproof

• Frequency In Hertz

  400.0

• Terminal Type And Quantity

  4 wire hook