The RM10D271KD12E100 is a varistor manufactured by Dersonic that is RoHS compliant. This varistor provides protection against electrical surges and transients and is rated for 455V, 0.4W, 37J, 225V, 370pF @ 1kHz, 175V, 270V, and 1250A, and is a radial-leaded component with a pin/post size of 7.5mm. The varistor is designed to act as a protective device by providing a low impedance path to ground during surges and transients.