Four poles, rated for AC distribution networks at 50/60 Hz. At 220/240 V it delivers the full 85 kA Icu, so for a 415 V service the 36 kA is the number to coordinate against upstream gear. The TM-D trip combines a thermal bimetal for overload protection (L) and a magnetic coil for short-circuit protection (I). Fixed magnetic pickup, no adjustment — set it and forget it. Rated 125 A at 50 °C ambient; if the panel runs hotter, expect to derate per the manufacturer's curve.
Breaking capacity — the number that decides selectivity
Breaking capacity steps across the voltage range: 85 kA at 240 V, 36 kA at 415 V, 30 kA at 500 V, 22 kA at 525 V, 8 kA at 690 V. That's enough for most transformer-fed panels downstream of a 1 MVA unit.
The 4-pole configuration puts the neutral on the left. IP40 finger-safe front; IK07 impact rating means it shrugs off a toolbox knock. Pollution degree 3 (conductive pollution expected), overvoltage category III — standard for fixed-installation distribution boards.
Mechanical endurance: 40,000 operations. Electrical endurance depends on the load: 40,000 cycles at 440 V at half rated current, 20,000 at full rated current. At 690 V it halves again — 15,000 at half load, 7,500 at full load. That's a lot of cycles for a distribution breaker; most panel breakers see fewer than a few hundred operations in their lifetime. The electrical endurance figures matter if this breaker is used for frequent ON/OFF switching rather than pure fault protection.