4B1978

Technical Characteristics

• Thread Class

  2a single reed

• Overall Length

  0.800 inches maximum

• Center To Center Distance Between Mounting Facilities Parallel To Width

  0.412 inches nominal single mounting facility

• Overall Height

  1.920 inches maximum

• Overall Width

  0.800 inches maximum

• Environmental Protection

  hermetic

• Coil Quantity

  1

• Mounting Facility Type And Quantity

  3 threaded stud single mounting facility

• Nominal Thread Size

  0.112 inches single mounting facility

• Mounting Facility Pattern

  isosceles triangle single mounting facility

• Center To Center Distance Between Mounting Facilities Parallel To The Altitude Of An Isosceles Triangle

  0.412 inches nominal single mounting facility

• Main Contact Load Current Rating At Maximum Rated Voltage

  1.0 amperes ac resistive load and 2.0 milliamperes dc

• Thread Series Designator

  unc single mounting facility

• Terminal Type And Quantity

  14 wire lead all functions

• Winding Quantity

  1

• Duty Type

  continuous

• Thread Quantity Per Inch

  40 single reed

• Nonpile-Up Main Contact Arrangement

  4 pole, double throw, one position momentary

• Operating Voltage Rating And Type At Specified Temp

  28.0 volts dc 25 deg celsius single winding

• Main Contact Maximum Voltage Rating In Volts

  115.0 ac and 28.0 dc