The Ingram UL Class 2 Transformer is a multi-tapped primary, dual winding secondary transformer allowing operation at 3 input and two output voltages. It employs PTC (positive temperature coeffient) auto resettable fuse technology to protect it from overload conditions. The PTC device effectively opens during the overload, then resets after the undesirable condition has been removed. These transformers are indespensible wherever low voltage supplies are needed.