The TM-D trip unit provides fixed long-time pickup at 1 In and a fixed instantaneous threshold of 5000 A, which is the magnetic trip point for short-circuit protection. For a distribution panel feeding a 500 A bus, this breaker sits as the main or a large feeder; the fixed trip settings mean no field adjustment — what you order is what protects the circuit. Breaking capacity is 40 kA Icu at 220/240 V AC and 36 kA Icu at 380/400 V AC, both per EN/IEC 60947-2. The 40 kA at 220 V covers North American 240 V split-phase distribution. Rated insulation voltage (Ui) is 690 V, and rated operational voltage (Ue) is 440 V AC. The 690 V Ui means the internal creepage and clearance distances are designed for a 690 V system, so the breaker can be used in 400/440 V circuits with full margin.
Fixed mounting on a backplate, with front connections on both the line and load sides. Neutral is on the left, which matters when aligning with a pre-drilled busbar or a downstream neutral bar.