ACST435-8BTR

Overview

The ACST435-8BTR is an overvoltage protected AC switch from STMicroelectronics, designed as a rugged alternative to conventional triacs for appliance and industrial applications. It integrates a triac structure with a high-voltage clamping device to absorb inductive turn-off energy and withstand line transient voltages. The device operates at a rated RMS current of 4 A with a maximum repetitive peak off-state voltage of 800 V. It features a sensitive gate allowing direct drive from microcontrollers and provides improved commutating dV/dt and dI/dt performance.

Feature Summary

• Built-in overvoltage protection absorbs inductive turn-off energy and withstands line transients
• Sensitive gate option enables direct drive from microcontrollers
• Improved commutating dV/dt and dI/dt capabilities enhance reliability

Applications

• Washing machine drum motor control
• Refrigerator compressor control
• Dishwasher pump motor control
• Industrial systems-medium power loads

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape-and-reel specifications. Ensure the component meets required environmental standards such as RoHS compliance before integration into final assemblies.

Selection Notes

Select this component when designing circuits requiring robust protection against voltage spikes and inductive load switching. The 800 V rating and 4 A current capacity suit general-purpose AC switching tasks where standard triacs might fail due to transient events.

Part Context

This part belongs to the ACST series of 800 V AC switches. The series expands upon previous versions by increasing the voltage range up to 800 V while maintaining current ratings from 4 A to 16 A. It serves as a specialized solution for appliances needing enhanced durability compared to standard triacs.

Replacement Considerations

Direct substitutes within the same family include ACST410-8BTR or ACST435-8FP depending on package requirements. Verify pin compatibility and thermal characteristics when replacing with other ACST variants.