Motor protection circuit breaker, 0.32 A, Class 10 — SIRIUS 3RV1021-0DA15-ZW96
The Siemens 3RV1021-0DA15-ZW96 is a SIRIUS motor protection circuit breaker designed for motor protection, with a continuous current rated value of 0.32 A and a Class 10 trip class. It snaps onto 35 mm DIN rail per DIN EN 50022 (screw and snap-on mounting). Rated breaking capacity hits 100 kA at 400 V AC — that's the short-circuit current it can safely interrupt without welding contacts or cascading failure upstream. Phase failure detection is built in; the breaker trips if one phase drops out, protecting the motor from single-phasing. No ground fault detection on this unit. The main contacts are rated for 100,000 mechanical operations typical. Auxiliary switch is present (transverse design), with zero auxiliary contacts for the main current circuit — the switch is integrated, not a separate block.
Mounting and panel integration — DIN rail, any position
Mounts on 35 mm DIN rail per DIN EN 50022, screw and snap-on. Mounting position is any — no derating for sideways or inverted install. Depth is 96 mm, width 45 mm, height 97 mm. Zero clearance needed at the sides or backwards. Front face is IP20 — touch-safe for panel interior, but not sealed against washdown or dust. Operating temperature range -20 to +60 °C; storage and transport -50 to +80 °C. Maximum operating altitude 2,000 m.
Termination and wiring — screw-type terminals
Main current circuit uses screw-type terminals. Solid conductor capacity: 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²). Stranded: 2x (1... 2.5 mm²) and 2x (2.5... 6 mm²). Power dissipation at AC in hot operating state is 5.5 W. Auxiliary switch contacts rated: 1 A at 24 V, 0.5 A at 230 V, 0.15 A at 60 V. Rated insulation voltage 690 V.
Sourcing and lifecycle — currently in production
No official successor is listed — this order code is the active variant for the 0.32 A, Class 10 motor protection breaker in the SIRIUS family.