The Siemens SENTRON 3VA1150-3EF32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 50 A across the 40 °C to 50 °C ambient range before it begins to derate. Breaking capacity hits 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and holds 11.9 kA at both 500 V and 690 V — giving you the SCCR headroom for high-fault utility feeds or transformer-secondaries in industrial distribution.
Mounts on a DIN rail or direct panel; the 76.2 mm width (3 in) and 70 mm depth (2.76 in) fit standard SENTRON 3VA cutouts — no gland-plate rework when swapping from an earlier 3VA frame. Maximum power loss of 17.1 W at rated load — factor that into enclosure thermal rise calculations, especially in a sealed panel with other heat sources. Operating range from -25 °C to 70 °C, storage from -40 °C to 80 °C; the derating curve above 50 °C (49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C) is the number to use for high-ambient installations like pump houses or rooftop MCCs.