Block vb pcb mount dual output transformers 12va block vb 1 229 the block vb pcb mount transformer 12va 2 x 9v 2 x 133ma has been designed for high ambient temperatures and is unconditionally short circuit proof this high quality transformer is also equipped with double output voltage for series or parallel connection while boasting permanent corrosion protection high insulation value and maximum electrical reliability thanks to xtradensifill resin encapsulation vb polar square wave