The Siemens 3VA1150-3EF36-0DH0 is a SENTRON molded case circuit breaker (MCCB) rated 50 A continuous at 40 °C through 50 °C, with a 3-pole construction and line-protection trip curve. It carries a full-load interrupting capacity of 75.6 kA at 240 V AC, 52.5 kA at 415 V, and still holds 11.9 kA at 690 V — enough to handle most industrial fault currents without cascading upstream breakers.
Current rating vs. ambient — no derating until 55 °C
At 55 °C it drops to 49 A, at 60 °C to 48 A, and at 70 °C to 45 A.
Interrupting capacity across voltage levels
The interrupting capacity is specified at five voltage points: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. This gives solid selectivity headroom downstream of a larger feeder breaker.
That covers remote status monitoring and safety-related undervoltage trip without separate accessory orders. The UVR is wired to a control voltage — if that voltage drops, the breaker opens, which is standard for emergency-stop or power-loss sequences.
Physical footprint and operating range
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a compact 3-pole MCCB footprint that fits standard panel mounting.