The Siemens 3RV1021-1HA15-ZW95 is a SIRIUS motor-protection circuit breaker rated for 8 A continuous current and 3 kW at 400 V, with a CLASS 10 trip characteristic.
Depth is 96 mm, which matters for enclosure depth planning; typical shallow enclosures under 120 mm may need a check. Terminal capacity: solid conductors 2×(0.5…1.5 mm²) and 2×(0.75…2.5 mm²); stranded 2×(1…2.5 mm²) and 2×(2.5…6 mm²). Mounting position any; no derating needed for horizontal or vertical orientation.
Environmental and mechanical limits
Shock resistance 25g / 11 ms. Maximum operating altitude 2 000 m. Mechanical endurance of main contacts typically 100 000 operations. Maximum switching rate at AC-3 is 15 operations per hour.
