The breaking capacity hits 36 kA Icu at 380/415 V AC 50/60 Hz per IEC 60947-2, which means it can safely interrupt a fault current up to 36,000 A at typical European 400 V distribution voltage without welding contacts or rupturing the arc chamber. At 220/240 V AC it's rated 85 kA Icu, so the same breaker handles higher available fault current on lower-voltage services — useful if the panel feeds both 400 V and 240 V sub-distribution. The TM-D trip unit provides L (thermal) protection for overloads and I (magnetic) protection for short-circuits. The thermal element responds to sustained overcurrent with an inverse-time curve; the magnetic element trips instantaneously on high fault current. No electronic adjustment or ground-fault module here — this is a fixed-curve thermal-magnetic breaker, straightforward to specify and swap.
Front connection on both upside and downside simplifies busbar and cable routing in a distribution panel.
Durability and isolation capability
Mechanical durability is 40,000 cycles; electrical durability varies with load: 40,000 cycles at 440 V at half rated current, 20,000 cycles at full 160 A, and 7,500 cycles at 690 V.