Overvoltage category 3 means it is rated for fixed-installation distribution boards, not plug-in portable gear.
The housing is 36 mm wide (2 width units), so it occupies two 18 mm module spaces in a standard distribution board. Tightening torque is 2.5 to 3 N·m.
Halogen-free and silicon-free construction — important for clean-room, food-processing, or corrosive-environment panels where outgassing from the breaker housing could contaminate contacts or optics. The breaker is rated for periodic exposure up to +55 °C and 95% humidity, which covers most non-condensing indoor electrical rooms. For a residential or light-commercial distribution board where the breaker is operated manually a few times a year, that is effectively lifetime. Neutral conductor switching is built in (the 1P+N configuration), so the neutral pole opens and closes with the live pole, providing full isolation on the switched side.