638-521

Technical Characteristics

• Thread Class

  2b single group

• Reliability Indicator

  not established

• Center To Center Distance Between Mounting Facilities Parallel To Length

  4.250 inches nominal single mounting facility single center group

• Maximum Transformer Power Rating

  250.0 volt-ampere single component

• Body Width

  3.406 inches nominal

• Body Height

  4.390 inches nominal

• Inclosure Type

  fully inclosed

• Mounting Facility Quantity

  4 single group

• Nominal Thread Size

  0.164 inches single group

• Winding Operating Current

  23.0 milliamperes ac maximum single component single secondary

• Winding Operating Voltage

  120.00 ac volts nominal single component single primary

• Thread Series Designator

  unc single group

• Terminal Type And Quantity

  2 wire lead and 2 connector, receptacle

• Body Length

  5.328 inches nominal

• Mounting Method

  threaded hole single group

• Winding Function And Quantity

  1 primary and 1 secondary single component

• Thread Quantity Per Inch

  32 single group

• Thread Direction

  right-hand single group

• Center To Center Distance Between Mounting Facilities Parallel To Width

  3.750 inches nominal single mounting facility single center group

• Frequency Rating

  60.0 hertz nominal single component

• Input-Output Phase Relationship

  single phase to single phase single component