What this MCCB does and where it fits
The Siemens 3VA1150-6GF46-0KF0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. Rated 50 A continuous across a 40 °C to 50 °C ambient range, it holds full current without derating up to 50 °C; above that it steps down to 49 A at 55 °C and 45 A at 70 °C. The 4-pole construction handles three-phase plus neutral, and the 800 V rated insulation voltage covers 400 V and 690 V line-to-line systems common in industrial plants. Interrupting capacity is the headline here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That 220 kA figure at 240 V means it can safely clear a fault on a high-capacity transformer secondary without the arc flashing over — critical for main breaker applications where available fault current is high. The 17 kA at 690 V still covers most motor branch circuits on 690 V systems. It ships with a shunt trip (STL) for remote tripping and an auxiliary switch plus trip alarm switch (HQ configuration) for status feedback to a PLC or annunciator. No undervoltage release, no ground-fault monitoring, no communication module — this is a straightforward line-protection breaker with remote trip and indication.
Panel fit and mounting
Dimensions: 70 mm deep, 101.6 mm wide, 130 mm tall. The 70 mm depth is shallow enough for most 200 mm deep enclosures, leaving room for wiring gutters. Width at 101.6 mm (4 inches) is standard for a 4-pole MCCB — it occupies one 4-inch slot in a multi-breaker panelboard or a DIN-rail adapter plate. The trip indicator and voltage trigger are built in, so no add-on modules are needed for local status.