What this MCCB delivers for the panel
The Siemens SENTRON 3VA1150-6EE32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 50 A up to 40 °C ambient — no derating needed at that temperature. Above 55 °C it steps down to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C, so a panel running warm near the top of the enclosure should account for the drop. Its interrupting rating hits 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 — figures that give strong selectivity headroom for high-fault installations like transformer secondaries or large motor control centers. The TM220 overcurrent release combines a thermal-magnetic trip with fixed settings, so no field adjustment of the magnetic pickup — the curve is factory-set for line protection duty. Rated insulation voltage is 800 V, and the front face carries IP40 protection, meaning it resists tools and solid objects over 1 mm but not water ingress; mount it inside a panel with a higher enclosure rating.
Integration into the enclosure
The 3VA1150-6EE32-0AA0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a 3-pole footprint that fits standard Siemens SENTRON mounting bases and busbar systems. Maximum power loss is 14.6 W, so ventilation or spacing from heat-sensitive components should be considered in a sealed enclosure. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. No undervoltage release or communication function is fitted on this variant, and there is no ground-fault monitoring — it is a straight thermal-magnetic line-protection breaker.