The Siemens SENTRON 3VA1150-5GD46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated at 50 A continuous, with a TM210 thermal-magnetic trip unit. It's built for line protection — main feeder or large subfeed duty in a panel — not for motor protection or ground-fault monitoring. The 50 A rating holds flat from 40 °C up to 50 °C ambient; above that it derates to 49 A at 55 °C and 45 A at 70 °C, so if your enclosure runs hot, that's the number that matters for the BOM.
Breaking capacity — where it fits
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V — numbers that put it in the high-interrupting category for a 50 A frame. At 500 V and 690 V it holds 17 kA, which is solid for industrial 480/277 V or 600 V systems. The insulation voltage is rated 800 V, so the breaker itself is built for the higher-voltage end; the limiting factor is the trip-unit calibration. For a 400/415 V panel feeding a 50 A load, you've got enough SCCR headroom to coordinate with most upstream transformers or larger feeders without cascading.
Panel fit and integration
Dimensions: 130 mm high, 101.6 mm wide, 70 mm deep — a 4-pole frame that fits standard Siemens MCCB mounting. Front IP40 protection means it's fine in a clean indoor panel but not washdown. Power loss is 14.6 W maximum, so factor that into enclosure thermal calculations if you're packing several breakers in a small cabinet. No undervoltage release, no communication function, no trip indicator — this is a plain thermal-magnetic breaker, no accessories built in.