ON-VEHICLE CONTROL DEVICE

An on-vehicle control device () includes a control unit (). The control unit () switches a block unit () to a blocking state based on a first blocking characteristic (BC). A relay () is turned off based on a second blocking characteristic (BC). In the second blocking characteristic (BC), a time decreases with a first degree of decrease as a current value increases. In the first blocking characteristic (BC), a time decreases with a second degree of decrease in a first current value range (R) as the current value increases, and a time decreases with a third degree of decrease in a second current value range (R) as the current value increases. The time is set to be longer in the first blocking characteristic (BC) than in the second blocking characteristic (BC) for the current value smaller than a threshold (Ith). The time is set to be shorter in the first blocking characteristic (BC) than in the second blocking characteristic (BC) for a current value larger than the threshold (Ith).