The Siemens 3RV2411-1JA20-0DA0 is a SIRIUS circuit breaker sized S00, designed specifically for transformer protection — not general motor or feeder duty.
This breaker is rated for transformer primary protection. At 230 V it handles 2.2 kW motor load equivalent; the gG fuse backup ratings at 400 V (50 A), 500 V (40 A), and 690 V (40 A) define the maximum upstream fuse for coordination. Breaking capacity varies by voltage: 100 kA at 240 V and 400 V AC, 42 kA at 500 V, and 6 kA at 690 V AC. No ground-fault or phase-failure detection built in; this is a straightforward thermal-magnetic design.
Snap-on or screw-fixed to 35 mm DIN rail. Clearance requirements: 50 mm above and below, 30 mm to the side, zero forward and backward — tight panel layouts are fine. Screwdriver shaft 3 mm diameter, tip 3.0 x 0.5 mm for the spring-loaded terminals.