Its TM240 thermal-magnetic release provides both overload and short-circuit protection, with the thermal element carrying the sustained load and the magnetic element clearing faults fast enough to protect downstream wiring. The 200 A rating holds flat from 40 °C through 50 °C, then derates linearly to 176 A at 70 °C — useful to know if this breaker sits in a warm enclosure near other heat sources.
This breaker's interrupting capacity varies sharply with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. The 240 V figure covers most North American 480Y/277 V panel applications where the line-to-neutral fault is the limiting case; the 415 V and 440 V ratings align with common 400 V-class industrial systems in IEC territories. At 690 V the 17 kA rating is still substantial for motor-control-center feeder duty.