RS IP65 Key Switches (16mm) Key Switches designed to fit industry standard 16mm diameter cut-outs in panels with a thickness between 0.5 and 5mm. Each Key Switch has a waterproof panel sealing to IP65. These two position Key Switches feature single entry keys (can only be inserted into the lock one way up) and same (common) key profile. Waterproof rated to IP65 16mm Φ panel cut out VDE rated to 5A 250Vac (8A 125Vac) Silver contacts Insulation resistance 50MΩ UL94-V0 flammability rated -25 to +55°C operating temperature range