ACST10-7SFP

Overview

The ACST10-7SFP is an overvoltage protected AC switch from STMicroelectronics, belonging to the ACS/ACST power switch family built with A.S.D. technology. It features a Triac structure and a high voltage clamping device to absorb inductive turn-off energy and withstand transients per IEC 61000-4-5. The device drives loads up to 10 A RMS with a 700 V blocking capability. It offers low gate triggering current (IGT < 10 mA) for direct microcontroller drive or high static dV/dt immunity (2 kV/µs minimum). The component provides UL certified insulation rated at 1500 V rms in the TO-220FPAB package.

Feature Summary

• Triac with integrated overvoltage crowbar protection
• High noise immunity against fast transients described in IEC 61000-4-4 standards
• Low gate triggering current allows direct interface with microcontrollers
• Insulated package providing 1500 V rms isolation

Applications

• AC mains static switching in appliance control systems
• Universal motor control for washing machine drums
• Compressor drive for refrigerators or air conditioners

Procurement Notes

Verify the exact ordering code against the manufacturer's official documentation before purchase. The datasheet lists standard codes such as ACST1010-7FP and ACST1035-7FP; confirm if the 'S' suffix denotes a specific variant or packaging difference. Ensure the requested part matches the required sensitivity (10 mA or 35 mA IGT) and package type (TO-220FPAB) specified in your design.

Selection Notes

Select this component for applications requiring robust transient immunity without external snubbers. Choose the ACST1010-7 variant for sensitive gate driving directly from logic circuits. Opt for the ACST1035-7 variant if higher static dV/dt immunity is critical. Ensure thermal management accommodates the junction-to-case thermal resistance of 3.5 °C/W for the insulated package under full load conditions.

Part Context

The ACST10 series serves as a rugged alternative to conventional Triacs for home appliances and industrial systems. It integrates a high voltage clamping device to handle line transients, reducing the need for external protective components like MOVs. This family supports medium power AC loads up to 10 A, offering improved commutating performance and reliability compared to standard devices.

Replacement Considerations

Direct substitutes within the same family include ACST1010-7FP and ACST1035-7FP, differing primarily in gate sensitivity. Verify that any replacement maintains the 700 V rating and 10 A current capacity. Cross-referencing with other manufacturers requires matching the overvoltage protection mechanism and package dimensions.