Littelfuse FPS-CTU-01-00 is a conformally coated device that operates at frequencies of 50, 60, or ASD. It features 3 Form A and 2 Form C relay contacts for fail-safe/non-fail-safe operations and offers IEEE device numbers 1, 2, 3, 5, 19, 27, 37, 38, 46, 47, 49, 50, 50G, 50N, 51, 51G, 51N, 55, 59, 74, 81, 86, and 94. It has a reset option via front-panel switch or remote N.O. Contact and supports standard harmonic filtering (DFT). It operates at supply voltages of 65-265 AC and 80-275 DC and offers communication via RS/TIA-485. Additional features include a 4-20 mA analog output current, a GF trip level range of 5-100% of CT-Primary Rating, support for up to 8 temperature sensors with MPS-RTD, 8 digital inputs, and one 4-20 mA analog input.