Printed Circuit Mount Power Transformers Signal Transformer Printed Circuit Mount Power Transformers operate between a frequency range of 50Hz and 500Hz without degradation in the output voltage. These transformers feature single or dual primaries. The printed circuit mount power transformers offer a dielectric strength of 1500Vrms and a class B insulation system. These transformers are available as PC/DPC variants with two outputs and MPC/DMPC variants with two center tap outputs. The printed circuit mount power transformers are UL recognized to UL 506/ UL 5058-2, file #E63829 and CSA certified to C22.2 #66.1, file #221070.