The Siemens SENTRON 3VA1150-6EF36-0JH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection. At 40 °C it carries 50 A continuous, with the ampacity holding flat through 50 °C before a gradual derating curve begins — 49 A at 55 °C, 48 A at 60 °C, down to 45 A at 70 °C. That thermal profile means this breaker delivers its full rating across typical panel ambient conditions without headroom loss. Breaking capacity is the headline spec here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. Those numbers place it in the high-interrupting category for an MCCB — it clears fault currents that would vaporize a standard thermal-magnetic breaker, so it suits high-capacity transformer secondaries or bus-tie positions where available fault current is extreme. Insulation voltage is rated 800 V, and the breaker includes a trip indicator, a shunt trip release (STL), and provisions for 2 auxiliary switches plus a trip alarm switch HQ. No undervoltage release, no ground-fault monitoring, no communication function — this is a clean line-protection MCCB with remote-trip capability via the shunt trip.
Panel integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width (3 inches) is a standard 3-pole MCCB footprint for Siemens SENTRON, so it fits existing panel cutouts and busbar arrangements without modification. Maximum power loss is 14.6 W — a factor for thermal budgeting in sealed enclosures. Operating temperature range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. The 70 °C operating ceiling matches the top of the derating curve, so the breaker runs at its published ratings across the full ambient span without additional margin required.