SENTRON 3VA1150-5EF32-0CC0 — 50 A MCCB for Line Protection
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). At 55 °C it carries 49 A, and at 70 °C it still holds 45 A — so the thermal curve is generous for warm enclosures. 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. It ships with an undervoltage release (UVR) and two HQ auxiliary switches integrated, so the panel builder gets the shunt trip and status feedback in one order code. 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.
Panel Fit and Integration
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. Rated insulation voltage is 800 V, so it's comfortable on 480/277 V and 600 V systems with headroom.