The Siemens SENTRON 3VA1150-4EF32-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a rated continuous current Iu of 50 A across the ambient range up to 50 °C, with a slight thermal derating at higher temperatures: 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. Breaking capacity is specified at multiple common voltages: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. For a 400 V three-phase industrial supply the 75.6 kA figure provides substantial fault-current headroom, and the 121 kA at 240 V covers high-fault single-phase taps. Dimensions are 76.2 mm wide, 130 mm high, and 70 mm deep — a compact footprint for a 50 A MCCB, fitting standard SENTRON panel cutouts.
This part is in active current production per the manufacturer's lifecycle stage designation.
Mounts on DIN rail or panel baseplate via SENTRON snap-on. Depth is 70 mm. No auxiliary contacts or communication modules included.