It trips on overload and short-circuit, with phase failure detection built in — so a single lost phase won't let the motor cook while drawing locked-rotor current. Width is 45 mm, depth 97 mm. Screw-type terminals on the main circuit accept 2× (0.5…1.5 mm²) solid or stranded, or 2× (0.75…2.5 mm²). No special crimp tool needed on site; a standard PZ2 screwdriver gets it done.
Where you'll find it
Typical spot: a motor control center bucket or a standalone panel feeding a pump, fan, or conveyor motor up to the rating limit of the Class 10 trip curve. The phase failure detection is especially useful on three-phase lines where a blown fuse upstream would otherwise go unnoticed until the motor burns. Mounting position is any — upright, sideways, even upside-down in a tight enclosure. No ground fault detection on this variant. If you need GF protection, you'd add an external module or step up to a 3RV20 series with the GF option. Phase failure is covered; ground fault is not.