ACST1035-7FP

Overview

The ACST1035-7FP is an overvoltage protected AC switch from STMicroelectronics, utilizing ACS technology with integrated crowbar protection. It features a Triac structure in a TO-220FPAB insulated package rated for 1500 V rms insulation voltage. The device supports a maximum on-state RMS current of 10 A and withstands repetitive peak voltages up to 700 V. It requires a gate trigger current (IGT) of up to 35 mA and offers high static dV/dt immunity of at least 2000 V/µs. The component operates within a junction temperature range of -40 to +125 °C.

Feature Summary

• Integrates overvoltage crowbar technology to absorb inductive turn-off energy and withstand transients per IEC 61000-4-5 standards without external protection components.
• Provides high static dV/dt immunity to ensure reliable operation against fast transients defined in IEC 61000-4-4 standards.
• Features an insulated TO-220FPAB package that eliminates the need for external insulating hardware while maintaining high off-state reliability through planar technology.

Applications

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

Procurement Notes

Verify the specific ordering code ACST1035-7FP to confirm the TO-220FPAB package variant. Ensure compatibility with the required 35 mA gate trigger sensitivity level for the driving circuitry. Confirm that the application environment remains within the specified thermal limits for the insulated package type.

Selection Notes

Select this component when designing circuits requiring inherent overvoltage protection to simplify bill of materials. Choose the 35 mA sensitivity version if the gate drive source cannot supply lower currents. Consider the thermal resistance characteristics of the FP package when calculating heatsinking requirements for continuous 10 A loads.

Part Context

This device belongs to the ACST10 series of power switches built with Application Specific Discrete (A.S.D.) technology. The series includes variants with different gate sensitivities and packages, such as the ACST1010-7T and ACST1010-7FP, allowing designers to balance triggering requirements and thermal management needs.

Replacement Considerations

Direct substitutes include other ACST10 series members like the ACST1010-7FP, which shares the same package but differs in gate trigger current sensitivity. Verify that any replacement maintains the required 700 V blocking voltage and 10 A RMS current ratings.

FAQ

How does the ACST1035-7FP handle overvoltage events?

It uses an integrated overvoltage crowbar technology that clamps low-energy spikes or switches to the on state to dissipate higher energy shocks, recovering its blocking capability after the surge.

What is the minimum static dV/dt immunity for this model?

The ACST1035-7FP guarantees a minimum static dV/dt immunity of 2000 V/µs at a junction temperature of 125 °C.

Is an external snubber required for inductive loads?

No additional snubber is typically required for turn-off commutation due to the device's thermal and turn-off performance capabilities, though standard design practices should be followed.