Series FP12 Industrial Control Transformers are similar to the AP12 Series with two important differences. The FP12 Series is 115 C rise (versus 55 C) and they are manufactured with an electrostatic shield between primary and secondary. They are designed to comply with industrial and automotive specifications that require the control transformer to be mounted in a separate enclosure, remote from the main control panel. External or remote mounting of the Series FP12 conserves critical panel mounting space and reduces internal control cabinet temperatures, which can be critical to the reliable operation of many solid state, logic, and thermal control devices.