ZV40K1812601NIR1HT is a low voltage, high temperature SMD multilayer varistor from the Bourns ZVHT series, designed to protect sensitive electronic devices against high voltage surges in low voltage applications. It features a maximum continuous working voltage of 40 Vrms (56 Vdc), a varistor voltage of 68 V at 1 mA, and a clamping voltage of 110 V at 8/20 µs pulse. The 1812 package size provides a maximum surge current capability of 600 A with typical capacitance of 1000 pF. This varistor operates over a wide temperature range of -55°C to +150°C, offering stable protection characteristics across varying environmental conditions. It is ideal for protecting integrated circuits and other sensitive components in automotive, industrial, and consumer electronics applications.