160 A MCCB with 121 kA interrupting capacity — line protection for distribution panels
Its interrupting capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that tell you it can clear high-fault-current events on the secondary side of a distribution transformer without cascading upstream. Rated current holds at 160 A from 40 °C through 50 °C, then derates to 158 A at 55 °C and 150 A at 70 °C. That thermal curve means you can load it at full nameplate in a ventilated enclosure; in a sealed, high-ambient panel you drop 6% at the top of the operating range. The breaker dissipates 40.5 W maximum — a number to include in your enclosure thermal budget.
Footprint is 70 mm deep, 76.2 mm wide, 130 mm tall — a standard MCCB form factor that fits most 3-pole distribution panelboards and motor control center buckets. The -25 °C floor means it is suitable for unheated electrical rooms in temperate climates, though not for deep-freeze applications.