63 A MCCB for line protection — what the ratings mean for your panel
The Siemens 3VA1163-4GF42-0AA0 is a SENTRON molded case circuit breaker rated for 63 A continuous current across a 40 °C to 50 °C ambient — no derating needed in a typical warm control room. At 55 °C it still carries 62 A, and at 70 °C it holds 58 A, so it eats the dust and runs in a hot enclosure without tripping early. Breaking capacity is the real selector here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That means it handles high-fault scenarios on the secondary side of a distribution transformer without cascading upstream — stable kiln, steady clinker. The TM240 overcurrent release is a thermal-magnetic design — thermal element for overload, magnetic for short-circuit. Four poles give you three-phase plus neutral protection in a single package, which simplifies wiring in a 3-phase 4-wire system.
Lifecycle and sourcing — active, not obsolete
Power loss is 17.3 W maximum — relevant for thermal budgeting in a sealed panel. The front face carries IP40 protection, so it's sealed against the grit of a cement plant control room but not rated for washdown.
Panel fit and integration
Dimensions are 70 mm deep, 101.6 mm wide, 130 mm high. That 70 mm depth is shallow enough to clear a standard 200 mm deep enclosure backplate with room for wiring gutters. The 4-pole width at 101.6 mm matches the standard 4-module MCCB footprint on DIN rail or bolted bus. Rated insulation voltage is 800 V, so it's comfortable on 690 V systems with margin. Storage range is -40 °C to 80 °C — handling, not running, is what that limit governs.