Tmax family is now available as a complete range of moulded case circuit-breakers up to 1600 A. All the circuit-breakers are available in the fixed version; the sizes T2, T3, T4 and T5 in the plug-in version and T4, T5, T6 and T7 in the withdrawable one as well. With the same frame size, the circuit-breakers in the Tmax family, are available with different breaking capacities and different rated uninterrupted currents.

The electric arc interruption system used on the Tmax circuit-breakers allows the short-circuit currents of very high value to be interrupted extremely rapidly. The opening speed of the contacts, the dynamic blasting action carried out by the magnetic field and the structure of the arcing chamber contribute to extinguishing the arc in the shortest possible time, limiting the value of the specific let-through energy I2t and the current peak.