The Siemens 3RV2411-1DA15 is a SIRIUS circuit breaker specifically designed for transformer protection. The 97 mm height is consistent with the SIRIUS 3RV2 compact form factor, so it aligns vertically with contactors and overload relays in a standard motor control center layout.
Breaking capacity is 100 kA at 400 V and 500 V, dropping to 10 kA at 690 V. On a three-phase transformer bank, if one primary fuse blows the breaker will trip on the secondary side, preventing single-phasing the load. No separate phase-loss relay needed. The auxiliary contact ratings cover 1 A at 24 V and 0.5 A at 230 V — enough to drive a PLC input or a small relay for remote trip indication. The main contact terminals accept 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded wire, which covers the typical control-circuit gauge for transformer primaries up to about 7.5 kVA.
Minimum clearances: 50 mm above and below, 30 mm to the side, and zero clearance forward or backward — meaning you can butt it against a back panel or enclosure wall without derating.