For switching and controlling lighting systems heating ventilation pumps heat pumps and other building automation functions for control panels mounts on 35 mm rails to din 50 022approvals iec 947 4 1 en 60 947 4 1 iec 1095 en 61 095 csa ulmarine classifications bv gl and dnvintegrated diode bridge for ac use can be fitted with two pole auxiliary contacts type eh 04 12 module width this is intended for switching control signals