SK-TRF8-MP is the new PC Board Mount socket to go along with the new 21XBXHL Flash Transfer Relay that was designed for the Next Generation  ATC Traffic Light Cabinets. This socket can be used for soldering direct to a PC Board Style controls that will fit through cutouts  in a panel. The sockets are molded from a plastic that can handle temperature from being run through a wave solder machine. They are made to handle up to 10 Amps @ 48VDC /120VAC loads.