1. ISO9001,IS014001 2. CE passed. 3. Professional manufacturer. 4. IP65 protective grade. LW30 series rotary switches applied to circuits of AC 50Hz with working voltave up to 440V and rated working current up to 100A.LW30 is suitable to control:air-conditioner,water pump and ventilating equipments,and AC motors with small power..LW30 series rotary switches have six current ratings:20A,25A,32A, ...