It carries 100 A continuously across the full ambient range from 40 °C to 70 °C with no derating — that's a solid 100 A at 70 °C, which matters when the panel sits next to a kiln or preheater tower where the cabinet air hits 60 °C and stays there.
That's unusual for an MCCB; most lose 10–20 % above 50 °C. Here, the 100 A at 70 °C means you can size it for a 100 A motor feeder in a hot enclosure and not oversize the breaker. The 330 kA interrupting capacity at 240 V covers most industrial secondary-fault scenarios; at 415 V it still holds 242 kA, which is enough for a 400 V distribution board with a transformer upstream. The 3-pole body with shunt trip (STL) and the auxiliary switch complement (2 aux + 1 trip alarm + 1 electrical alarm HQ) lets you wire remote tripping and status feedback without adding external relays.
That 105 mm width for a 3-pole 100 A MCCB is standard for the SENTRON 3VA frame — it drops into a panel cutout or DIN-rail mount without surprises.