Motor protection circuit breaker, 0.16 A, CLASS 10
The Siemens 3RV1021-0AA15 is a SIRIUS motor protection circuit breaker designed for motor protection, rated at 0.16 A continuous current with a CLASS 10 trip class — meaning it will trip within 10 seconds at 7.2× rated current, sized for small fractional-horsepower motors or control transformer primaries where the inrush duration stays under that curve. Its 100 kA breaking capacity at 400 V AC (and at 240 V, 500 V, and 690 V AC) means it safely interrupts fault currents up to that level without cascading upstream — a figure that holds the unit on the grid for high-fault-capacity industrial panels, provided the upstream protective device is coordinated.
DIN rail integration and wiring
At 45 mm wide, 97 mm tall, and 96 mm deep, this breaker occupies a single 45 mm module on the DIN rail — a standard footprint for SIRIUS motor protection breakers, so it fits existing panel layouts without re-spacing. The main circuit uses screw-type terminals accepting solid conductors of 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²), or stranded 2x (1... 2.5 mm²) and 2x (2.5... 6 mm²). The auxiliary switch is transverse design, with zero auxiliary contacts fitted as standard — if you need aux contacts, they are added separately. Clearance: 0 mm backwards and 0 mm at the side, so no extra air gap is required between units on the rail — you can pack them tight.
Shock resistance is 25g for 11 ms.
Auxiliary switching and contact ratings
An auxiliary switch is present (transverse design), rated at 1 A at 24 V, 0.5 A at 230 V, and 0.15 A at 60 V — these are the switching capacities for the auxiliary contact block, not the main motor circuit. Mechanical endurance of the main contacts is typically 100 000 operating cycles. Maximum switching frequency at AC-3 duty is 15 operations per hour.