The Siemens 3VA1150-5EF32-0CC0 is a SENTRON molded case circuit breaker (MCCB) rated for continuous current of 50 A at 40 °C, with no derating needed up to 50 °C (still 50 A). The 187 kA breaking capacity at 240 V is the headline number for fault clearing; at 415 V it interrupts 121 kA, at 440 V it handles 75.6 kA, and at 500 V or 690 V it still breaks 17 kA. That SCCR range covers most industrial distribution panels without needing upstream current-limiting fuses. This is a 3-pole breaker designed for line protection — not motor protection or ground-fault monitoring. The basic switch variant is 3VA11505EF320AA0, which is the core breaker without auxiliaries; this -0CC0 suffix adds the UVR and dual aux switches as a factory-assembled configuration.
The 3VA1150-5EF32-0CC0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits SENTRON distribution panels and most DIN-rail adapter plates. The 70 mm depth is worth noting for shallow enclosures: it leaves room behind the door for wiring and the UVR coil.