The 2-pole configuration (2P) switches both phase conductors; neutral conductor switching is not included, so the neutral bar remains continuous through the panel. Mounting position is unrestricted — vertical, horizontal, or inverted — which simplifies layout in crowded enclosures.
Thermal derating and ambient limits
At 40 °C the breaker must be derated to 46.19 A; at 45 °C to 44 A; at 55 °C to 39.81 A. These are per the manufacturer's published curve — panel builders should apply the derating factor for the enclosure's internal temperature rise, not the room ambient. Degree of pollution is 2 (non-conductive pollution that may become conductive due to condensation), which covers most indoor panel environments.
Dimensions are 76 mm depth, 36 mm width (2 MW), 90 mm height. Installation depth is 70 mm — the extra 6 mm accounts for the terminal screw clearance behind the DIN rail.