The Siemens SIRIUS 3RV2411-1GA20-0DA0 is a circuit breaker designed specifically for transformer protection. It belongs to the SIRIUS family and the size S00 frame, which keeps the footprint compact at 45 mm wide and 97 mm deep. Mounting is via screw or snap-on onto a 35 mm DIN rail per DIN EN 60715, and it can be placed in any orientation.
Breaking capacity and trip class
Rated breaking capacity hits 100 kA at 400 V AC and holds that figure at 240 V and 500 V AC. At 690 V AC it drops to 4 kA — that's the voltage limit for this frame. Trip Class 10 means it clears overloads fast enough to protect transformer windings without nuisance tripping on inrush. The rated value covers 20…690 V, so it covers standard European 400 V and North American 480 V systems.
Integration and clearances
The S00 frame needs 50 mm clearance upwards and downwards, 30 mm at the sides, and zero forwards or backwards. That slots into a standard 200 mm deep enclosure with room for wiring. Spring-loaded terminals on the main circuit accept 2x (0.5…4 mm²) solid or stranded. Ambient operating range is -20 to +60 °C; storage and transport tolerate -50 to +80 °C.