Phoenix contact print tension spring clamp with square cross section to 15mm phoenix contact 1715721 the phoenix contact 2 way print tension spring clamp with square cross section to 15mm has a connection direction horizontal to the pcb assembly with a case mortise for wave soldering this well designed pcb terminal block is equipped with a screw connection and can be aligned to create different numbers of positions phoenix contact 1715721 2 way pcb terminal block 508mm 135a green