What it is and where it fits
The Siemens 3RV2411-1HA10-0BA0 is a SIRIUS-brand circuit breaker specifically designed for transformer protection, not general motor or cable protection. It's a Size S00 unit — the smallest frame in the SIRIUS molded-case family — so it fits into tight panel layouts alongside contactors and overloads. The 45 mm width and 97 mm depth let it drop into a standard 35 mm DIN rail enclosure without reworking the gland plate or bending the wiring tray. Mount it any position you like; screw and snap-on both work.
What the ratings mean for your line
The Class 10 trip characteristic means it opens within 10 seconds at 7.2× the thermal setting — fast enough to protect a transformer's inrush without nuisance tripping on magnetizing current. That's the key difference from a general-purpose motor-protective breaker (Class 10 is standard for motor starting too, but the curve here is tuned for transformer inrush). The interrupting ratings tell you what fault current it can safely clear: 100 kA at 400 V AC, 42 kA at 500 V AC, and 6 kA at 690 V AC. At 240 V AC it still holds 100 kA. Those numbers mean it handles high available fault current common in industrial distribution without needing a current-limiting fuse upstream — a real space saver on the DIN rail.
Panel integration details
Screw and snap-on mounting onto 35 mm standard mounting rail per DIN EN 60715. The screw terminals accept 2× (0.75 to 2.5 mm²) solid or stranded, or 2× 4 mm². Use a Pozidriv size 2 tip with a 5 to 6 mm shaft diameter. Clearance distances: 50 mm upwards and downwards, 30 mm at the sides, zero forwards and backwards. That means you can butt it against the back panel and the door — no extra breathing space needed behind the rail.