VDE; UL / C-UL recognised; BEAB; SEMKO;. For suitable socket please see stock number. Interface Modules RT Series. Fully assembled relay interface modules DIN rail or chassis mounting Relays available separately Contact Material AgNi Mechanical life: DC versions: 30 x 10 6 operations, AC versions; 10 x 10 6 Switching Voltage 250 Vac; 440 Vac Isolation coil to contact 5000V Operating Temperature Range -40 to +85°C