What it is and what it does
The Siemens 3RV1021-0DA15-ZW97 is a SIRIUS motor protection circuit breaker designed for motor protection, with screw-type terminals for the main and auxiliary circuits. Continuous rated current is 0.32 A with Trip Class CLASS 10. The breaking capacity is 100 kA at 400 V AC, so it safely interrupts fault currents up to that level without cascading upstream — critical for high-fault panels where a lower-rated device would require a current-limiting upstream breaker.
Mounting and integration
Mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 50022, in any mounting position. Dimensions are 45 mm wide, 97 mm high, 96 mm deep — fits a standard 45 mm module slot on the DIN rail with zero clearance required at the back or sides. IP20 protection on the front means it is finger-safe for panel installation but not rated for washdown environments. Wire sizes: solid conductors accept 2x (0.5…1.5 mm²) and 2x (0.75…2.5 mm²); stranded accept 2x (1…2.5 mm²) and 2x (2.5…6 mm²); AWG for main contacts is 2x (14…10).
Environmental and compliance
Operating temperature range is -20 to +60 °C; storage and transport range is -50 to +80 °C. Shock resistance rated at 25g for 11 ms. Substance prohibitance (RoHS compliance) dated 01.05.2012.