SM3-20-50VDC1

Technical Characteristics

• Maximum Continuous Load Current Rating Per Pole

  20.0 amperes dc single location

• Trip Delay Time In Seconds Per Rated Continuous Current

  9.000 maximum at 200 pct single location and 0.500 minimum at 200 pct single location and 1.750 maximum at 400 pct single location

• Pole Quantity

  1

• Case Material

  metal

• Manual Actuator Type And Quantity

  1 toggle

• Internal Trip Release Configuration

  series trip single location

• Trip Release Characteristic

  time delay single location

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

  500.0 dc single location

• Main Contact Tripping Mechanism Type

  trip free

• Arc Quenching Method

  magnetic blowout

• Body Length

  1.562 inches maximum

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

  115.0 single location

• Operating Voltage Type And Rating Per Pole In Volts

  50.0 dc single location

• Fragility Factor

  moderately rugged

• Trip Release Method

  magnetic single location

• Bushing Length

  0.332 inches minimum and 0.380 inches maximum

• Reset Method

  manual

• Mounting Facility Type And Quantity

  1 threaded bushing w/panel seal

• Actuator Position Designation

  at pole one

• Storage Type

  general purpose warehouse

• Actuator Function

  trip-reset

• Thread Pitch Diameters

  +0.3503/+0.3537 inches

• Ultimate Trip Time Per Pole In Seconds

  3.000 minimum single location and 60.000 maximum single location

• Inclosure Protection Type For Which Designed

  fungus resistant and hermetically sealed

• Nominal Thread Size

  0.375 inches

• Thread Quantity Per Inch

  32

• Specification/Standard Data

  81349-mil-c-39019/1 government specification

• Circuit Protection Type

  overcurrent single location

• Center To Center Distance Between Terminals Parallel To Length

  0.906 inches maximum

• Body Style

  single pole type

• Body Width

  0.625 inches maximum

• Thread Series Designator

  unef

• Mounting Surface To Terminal End Distance

  1.700 inches maximum

• Terminal Type And Quantity

  6 wire hook

• Test Data Document

  81349-mil-c-39019 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type

• ~1

  data on certain environmental and performanc