ACST1035-7T

Overview

The ACST1035-7T is a standard Triac from the ACS™/ACST power switch family, manufactured by STMicroelectronics. It features an integrated overvoltage crowbar protection device designed to absorb inductive turn-off energy and withstand transients per IEC 61000-4-5 standards. The component operates with a maximum on-state RMS current of 10 A and a rated repetitive off-state voltage of 700 V. It utilizes a TO-220AB through-hole package and supports a junction temperature range of -40°C to +125°C. The device requires a maximum gate trigger current of 35 mA and offers high static dV/dt immunity of at least 2000 V/µs.

Feature Summary

• Integrates overvoltage crowbar technology for self-protection against line transients without external components
• Provides high noise immunity with a minimum static dV/dt rating of 2000 V/µs
• Features an insulated TO-220FPAB package option offering 1500 V rms insulation capability

Applications

• AC mains static switching in home appliance control systems
• Driving universal motors such as washing machine drums
• Compressor control for refrigerators or air conditioners

Procurement Notes

Verify the specific ordering code suffix to confirm the package type, as the ACST1035 series is available in both TO-220AB (suffix T) and TO-220FPAB (suffix FP). Confirm RoHS compliance status and check for any Product Change Notifications regarding assembly sites or manufacturing updates before finalizing procurement plans.

Selection Notes

Select the ACST1035-7T variant when a higher gate trigger current of up to 35 mA is acceptable, as it provides superior static dV/dt immunity compared to the lower sensitivity version. Ensure the application load does not exceed the 10 A RMS limit and verify that the thermal management strategy accommodates the specified junction-to-case thermal resistance for the chosen package.

Part Context

This component belongs to the ACST10 series within the ACS™/A.S.D.® family of power switches built with application-specific discrete technology. The series is engineered for medium-power AC loads up to 10 A, combining Triac functionality with high-voltage clamping devices to enhance reliability in industrial and domestic environments.

Replacement Considerations

The ACST1010-7T is listed as a manufacturer-recommended alternative within the same series. It shares identical electrical ratings but features a lower gate trigger current requirement of 10 mA.