The Siemens SENTRON 3VA1150-6EF32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection with a continuous current of 50 A. Its interrupting capacity hits 220 kA at 240 V — that's the number that governs selectivity in a high-fault panel; at 415 V it still delivers 154 kA, and at 690 V it's 17 kA. The TM240 thermal-magnetic release handles overload and short-circuit trip curves, and there's an integrated undervoltage release (UVR) for remote shunt-trip capability. No auxiliary contacts or communication module onboard — this is a standalone breaker for a main feeder or large branch.
Derating and temperature
At 40 °C, 45 °C, and 50 °C the breaker holds the full 50 A. It starts to derate at 55 °C to 48 A, then 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. If the panel ambient runs hot near the top of the operating range (-25 °C to 70 °C), factor that 45 A ceiling into the load schedule.
Mounting and dimensions
Width is 76.2 mm (about 4.5 modules of 17.8 mm) — standard for a 3-pole 50 A frame. Depth 70 mm, height 130 mm. Mounts on a DIN rail or bolts directly to the panel backplate. Front protection is IP40, so keep it inside a sealed enclosure for washdown areas.
Lifecycle and sourcing
Listed as current production. The undervoltage release is a separate order code (3VA9608-0BB11) that ships with the breaker — verify it's included in your BOM. No official successor or cross-reference; this is the active SENTRON 3VA line. Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time.