ACST4-8CFP

Overview

The ACST4-8CFP is a standard TRIAC from the ASD series manufactured by STMicroelectronics. It features an 800 V blocking voltage and supports a maximum RMS on-state current of 4 A. The device utilizes Snubberless technology, enabling high commutation performance suitable for AC inductive loads. Key electrical parameters include a maximum gate trigger current (Igt) of 25 mA and a holding current (Ih) of 35 mA. Non-repetitive surge currents are rated at 30 A for 50 Hz and 33 A for 60 Hz operation. The component is housed in a TO-220FP through-hole package.

Feature Summary

• Snubberless / logic level technology providing high commutation performances
• Suitable for use on AC inductive loads
• Three quadrants Triac configuration

Applications

• Universal motors
• Electro valves
• Kitchen aid equipments
• Power tools
• Dishwashers

Procurement Notes

Verify component authenticity and datasheet version when sourcing this part. Note that the product status is listed as obsolete or discontinued in available records. Ensure replacement strategies account for end-of-life status and confirm RoHS3 compliance requirements with suppliers prior to procurement.

Selection Notes

Select this component for applications requiring 800 V blocking capability and 4 A continuous current handling in a through-hole format. The Snubberless feature simplifies circuit design by reducing external snubber components. Verify thermal management needs for the TO-220FP package based on specific load duty cycles and ambient temperature conditions.

Part Context

This device belongs to the ASD series of TRIACs from STMicroelectronics. The series is characterized by Snubberless technology designed for reliable switching in AC power control applications. The ACST4-8CFP specifically offers higher voltage and current ratings compared to lower-end variants within the same family.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.