AC switches integrate surge protection

22 July 2009 Power Electronics / Power Management

Two new families of AC power switches from STMicroelectronics aim to simplify the design of domestic appliances and industrial equipment by integrating surge protection that meets the international standard IEC 61000-4-5. The 10 A ACST10 and 12 A ACST12 families can be used for protecting washing-machine motors, compressors for refrigerators or airconditioning units, or in industrial drives. The devices replace conventional electromechanical relays or TRIAC-based power switches, which require additional external components to prevent damage caused by voltage surges in the AC supply or by energy stored in the load. Package options include the through-hole TO-220AB and plastic insulated TO-220FPAB packages for the ACST10 family, and TO-220AB or surface-mount D2PAK for the ACST12 family.

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