3VA1150-4EF32-0KA0 — SENTRON Molded Case Circuit Breaker, Line Protection, 50 A
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. This makes it suitable for panel environments where ambient heat rises — the thermal performance holds the full 50 A rating up to 50 °C, so in a typical 40 °C enclosure it runs at nameplate without derating. 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. The unit is equipped with a shunt trip release (STL) for remote tripping, a TM240 thermal-magnetic overcurrent release, and includes a voltage trigger. 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. Front protection is IP40, suitable for enclosed panel mounting; no auxiliary contacts or communication functions are fitted on this variant.
Lifecycle and Sourcing
This part is in active current production per the manufacturer's lifecycle stage designation. It is sourced through independent distribution channels and quoted to order against an RFQ; current pricing and availability are confirmed at quote time.
Mounting and Integration
Mounts on DIN rail or panel baseplate via SENTRON snap-on. Depth is 70 mm. No auxiliary contacts or communication modules included.