257B

Technical Characteristics

• Environmental Protection

  hermetic

• Winding Dc Resistance Rating

  4.0 kilohms nominal single winding

• Winding Quantity

  1

• Main Contact Load Current Rating At Maximum Rated Voltage

  5.0 amperes ac resistive load and 500.0 milliamperes dc resistive load

• Overall Length

  3.180 inches nominal

• Nominal Operating Current Rating And Type

  8.1 milliamperes dc single winding

• Nonpile-Up Main Contact Arrangement

  1 pole, double throw, one position momentary

• Coil Quantity

  1

• Main Contact Maximum Voltage Rating In Volts

  50.0 ac and 500.0 dc

• Terminal Type And Quantity

  5 pin all functions

• Duty Type

  continuous

• Mounting Facility Type And Quantity

  1 plug-in terminal single mounting facility

• Special Features

  arc quenching method: hydrogen

• Overall Diameter

  1.280 inches nominal