Block vc pcb mount single output transformers block vc 5 0118 the block vc pcb mount transformer 5va 18v 277ma is ideal for adjustment of the voltage and simple electrical isolation while also acting as a safety isolating transformer for the safe electrical isolation of the input and output sides suitable for creating selv and pelv circuits because of the limit on the output voltagedesigned with excellent size to power ratio with mounting tabs on side of housing this high quality transf