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Here you will find a wide assortment of contactors, with three-pole and four-pole versions, available with two coils in ac and dc. Specific versions for dc load interruptions are also available. For example: if you have a four-pole working machine but have a three-pole contactor at your disposal, you just need to add an auxiliary contact to transform it into four-pole, obviously the contactor must be of the same make and model.
