to avoid thermal motor overloads, e.g. due to high switching frequency, heavy starting, single-phase operation, restricted cooling, high ambient temperature, according to DIN0660 Part 302 (pr EN 60 947-8) and Part 303, 1 input for thermistors or bimetallic contacts, wire break detection in the sensor circuit, closed-circuit principle (output relay not activated in the event of a fault), with restart lock (reset function), zero-voltage safe, 45 mm width
