What this 4-pole MCCB does for your panel
The Siemens 3VA1150-3GD46-0AA0 is a SENTRON molded case circuit breaker rated for 50 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. Its four poles handle three-phase plus full-rated neutral — the N-conductor protection is 100 %, meaning the neutral pole carries the same 50 A rating as the phases, so you don't have to oversize for unbalanced loads. Interrupting capacity hits 75.6 kA at 240 V AC and 52.5 kA at 415 V AC, which covers most industrial service-entrance and distribution panel fault levels without cascading upstream.
Current rating and thermal derating — what the numbers mean
The 50 A continuous rating holds flat from 40 °C up to 50 °C ambient — no derating needed in a typical ventilated panel. At 55 °C it drops to 49 A, at 60 °C to 48 A, and at 70 °C to 45 A. That's a gentle slope compared to some older MCCB designs that start derating at 40 °C. If your panel runs hot near a drive or transformer, this one gives you a few degrees of headroom before you have to down-rate the circuit. The maximum power loss is 14.6 W at rated current — modest enough that adjacent breakers in a multi-pole group won't thermally crowd each other. Operating range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C, so it handles cold warehouses and hot equipment rooms alike.
Interrupting capacity across voltage levels
This breaker's interrupting capacity varies significantly with system voltage — a key point when specifying for multi-voltage installations. At 240 V AC it clears 75.6 kA; at 415 V AC it's 52.5 kA; at 440 V AC it's 32 kA; and at 500 V and 690 V AC it drops to 11.9 kA. That last figure still covers most motor branch circuits at 690 V, but for high-fault utility feeds at 480 V you'll want to verify your available fault current against the 32 kA at 440 V. Rated insulation voltage is 800 V, and maximum DC operational voltage is 600 V — so it can serve DC combiner or battery circuits within that limit, though the interrupting ratings listed are for AC. The 4-pole format with 100 % neutral means it's also suited for TN-S or TN-C-S systems where the neutral must be switched and protected.
Mounting and panel fit
Dimensions are 101.6 mm wide, 130 mm tall, and 70 mm deep — a standard SENTRON 3VA frame size that fits Siemens distribution panels and most third-party enclosures with a DIN-rail or screw-mount adapter. The IP40 front protection means it's suitable for indoor panel mounting where no water spray is present. An optional motor drive is available for remote tripping or re-closing applications.