What it is and where it fits
The Siemens 3RV6411-1CA10 is a SIRIUS circuit breaker designed specifically for transformer protection, meaning its thermal-magnetic trip curve is shaped to handle the inrush and overload profile of a transformer primary rather than a motor start. Rated at 2.5 A operational current and 690 V, it sits in the compact Size S00 frame — 45 mm wide, 97 mm tall, 96 mm deep — and mounts via screw or snap-on onto standard 35 mm DIN rail per DIN EN 60715. Trip Class 10 means the thermal overload release will trip within 10 seconds at 7.2× the set current, a standard match for transformer thermal capacity. The magnetic short-circuit release handles faults directly, and the unit is rated for 6 kV surge voltage resistance.
Sourcing and lifecycle
The 3RV6411-1CA10 is a 3-pole unit with screw-type terminals for the main current circuit, accepting 2×(0.75…2.5 mm²) solid/stranded or 2×4 mm² solid. Torque range on the terminals is 0.8…1.2 N·m. It operates at 50…60 Hz and dissipates 6 W typical total power loss.
Integration notes
Mounting position is any, and the breaker can be installed with zero clearance forwards and backwards. Minimum clearance above and below is 50 mm each, and 30 mm at the sides — important when packing multiple units on a DIN rail in a control panel. The ambient operating range is -20…+60 °C, with storage/transport range from -50…+80 °C. Humidity tolerance is 10…95 % RH during operation. Installation altitude is limited to 2 000 m above sea level.