Four poles cover three-phase plus neutral or a four-wire distribution circuit. The 187 kA breaking capacity at 240 V AC handles high-fault service-entrance or sub-distribution boards; at 415 V it still interrupts 121 kA, and at 690 V it holds 17 kA.
Thermal derating — the real ampacity in a warm panel
Above that it steps down: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, 114 A at 70 °C. The TM210 trip unit is fixed thermal plus magnetic; no adjustment dial, so the curve is what it is.
The case measures 130 mm tall, 101.6 mm wide, 70 mm deep — a 4-inch wide footprint that matches the 3VA1110/1112 family.
