It mounts on standard DIN rail or with screw fixing, takes 3 width units (roughly 54 mm), and accepts conductors in tunnel terminals top and bottom. Sealable, too, so a panel builder can lock the toggle position after commissioning.
Temperature range and environmental limits
Rated for ambient -40 °C to 75 °C, which covers most outdoor enclosures in northern climates and hot machinery cabinets. The surrounding air can hit +55 °C with up to 95% humidity periodically — no derate needed within that band for the 20 A rating. Vibration resistance is 50 m/s² at 25 to 150 Hz and 60 m/s² at 35 Hz (4 sec), tested per IEC 60068-2-6; shock resistance is 150 m/s² at 11 ms half-sine per IEC 60068-2-27. That's tough enough for a panel mounted on a compressor skid or a conveyor drive frame.