The Encapsulated Chassis 42P is designed for a 250 A tee-off feed with an 18 mm pitch. It has a withstand rating of Icw 25 kA/0.1s and 10 kA/1s, as well as an Icc rating of 30 kA. The chassis features 2 mm thick copper incoming terminals and a 1.2 mm thick galvanized iron base. It is coated with duravin SCI-TV, making it suitable for S200 breakers in the IA range IPD.