49-1957-1B4

Technical Characteristics

• Thread Series Designator

  unef single mounting facility

• Individual Section Quantity

  1

• Contact Load Current Rating

  2.0 amperes resistive load ac at sea level

• First Flat Length

  0.375 inches nominal single actuator

• Shaft Diameter

  0.248 inches minimum single actuator and 0.252 inches maximum single actuator

• Contact Voltage Rating In Volts

  28.0 dc at sea level

• Throw Quantity

  4 single section rear

• Overall Diameter

  1.170 inches nominal

• Shaft Flat/Slot Angular Location

  180.0 degrees from contact position 1 single actuator

• Contact Load Current Rating

  1.0 amperes resistive load dc at sea level

• Nonturn Device Type

  slotted bushing at 3:00 o'clock

• Overall Length

  1.967 inches nominal

• Switch Actuator Stop Device Type

  fixed stop single actuator

• Switch Actuator Positioning Increment

  45.0 degrees single actuator

• Contact Voltage Rating In Volts

  115.0 ac at sea level

• Err Default

  err default

• Flat Height

  0.210 inches nominal single actuator

• Style Designator

  tap, circular, bushing mount

• Nominal Thread Size

  0.375 inches single mounting facility

• Shaft Type

  round, flatted single actuator

• Contact Switching Action

  breaks before makes single section rear

• Hazardous Locations/Environmental Protection

  explosion proof

• Mounting Method

  threaded bushing single mounting facility

• Rotor Through Connection Quantity

  2 single section

• Pole Quantity

  2 single section front

• Switch Actuator Indexing Position Quantity

  4 single actuator

• Thread Class

  2a single mounting facility

• Shaft Length

  0.937 inches nominal single actuator

• Terminal Type

  tab, solder lug

• Switch Contact Basic Design

  nonpile-up symmetrical