SM3-250MA50VDC2

Technical Characteristics

• Thread Series Designator

  unef

• Unpackaged Unit Weight

  5.100 ounces

• Inclosure Protection Type For Which Designed

  hermetically sealed

• Trip Delay Time In Seconds Per Rated Continuous Current

  0.050 minimum at 200 pct and 0.950 maximum at 200 pct

• Internal Trip Release Configuration

  series trip

• Main Contact Tripping Mechanism Type

  trip free

• Trip Release Method

  magnetic

• Operating Voltage Type And Rating Per Pole In Volts

  50.0 dc

• Thread Quantity Per Inch

  32

• Storage Type

  general purpose warehouse

• Mounting Facility Type And Quantity

  1 threaded bushing w/panel seal

• Fragility Factor

  moderately rugged

• Center To Center Distance Between Terminals Parallel To Length

  0.870 inches minimum and 0.880 inches maximum

• Case Material

  metal

• Body Width

  0.567 inches minimum and 0.629 inches maximum

• Body Length

  1.448 inches minimum and 1.510 inches maximum

• Body Style

  single pole type

• Terminal Type And Quantity

  2 wire hook

• Nominal Thread Size

  0.375 inches

• Actuator Position Designation

  at pole one

• Actuator Function

  trip-reset

• Manual Actuator Type And Quantity

  1 toggle

• Reset Method

  manual

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

  125.0

• Trip Release Characteristic

  time delay

• Circuit Protection Type

  overcurrent

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

  500.0 dc

• Maximum Continuous Load Current Rating Per Pole

  250.0 milliamperes dc

• Arc Quenching Method

  magnetic blowout

• Pole Quantity

  1

• Mounting Surface To Terminal End Distance

  1.524 inches minimum and 1.586 inches maximum

• Bushing Length

  0.360 inches minimum and 0.380 inches maximum