It handles a breaking capacity of 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that tell you it's sized for high-fault locations like a main feeder or a large motor control center.
At 70 mm deep, 76.2 mm wide, and 130 mm tall, this MCCB drops into a standard Siemens SENTRON panel or any DIN-rail-compatible enclosure — the width is three inches, which is the same footprint as most 3-pole molded-case breakers in this class.
Thermal performance and real-world current
At 55 °C it derates to 62 A, at 60 °C to 61 A, at 65 °C to 60 A, and at 70 °C to 58 A — so if your panel runs hot (say near a furnace or in a non-conditioned space), you still get nearly full-rated current. Maximum power loss is 17.3 W, which is typical for a 63 A MCCB and easy to manage with natural convection in a ventilated enclosure.
Lifecycle stage is current.