Block vc pcb mount dual output transformers block vc 1029 the block vc pcb mount transformer 10va 2 x 9v 2 x 111a 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 voltage designed with excellent size to power ratio with mounting tabs on side of housing this high quality