ACST6-7SG

Overview

The ACST6-7SG is a single-channel logic-sensitive gate TRIAC manufactured by STMicroelectronics, housed in a surface-mount D2PAK (TO-263) package. It supports a maximum repetitive peak off-state voltage of 700 V and an RMS on-state current of 6 A. The device features a maximum gate trigger current of 10 mA and a holding current of 25 mA, enabling direct interface with microcontrollers or logic circuits. It operates within a junction temperature range of -30°C to 125°C and withstands non-repetitive surge currents of 45 A at 50 Hz and 50 A at 60 Hz.

Feature Summary

• Logic-sensitive gate architecture allows direct drive from standard logic outputs without additional buffering components.
• Surface-mount D2PAK packaging provides robust thermal dissipation capabilities for high-current applications.
• High surge current tolerance ensures reliability during motor startup or inductive load switching events.

Applications

• Low-loss electronic starters for compressor motors
• Solid-state relay modules requiring logic-level control
• Lighting dimmer circuits for resistive or inductive loads

Procurement Notes

Verify component authenticity through authorized distributors as the part status is listed as obsolete. Confirm RoHS3 compliance and MSL level 3 handling requirements during storage and assembly. Cross-reference manufacturer part numbers against distributor codes to ensure correct variant selection.

Selection Notes

Select this component when a compact surface-mount solution is required for 6A AC switching with logic-compatible triggering. Ensure the circuit design accommodates the 700V blocking capability and that heat sinking is adequate for the D2PAK package under continuous load conditions.

Part Context

This device belongs to the ACST6 family of power TRIACs designed for industrial and consumer applications. It complements other STMicroelectronics power semiconductors by offering integrated logic sensitivity, reducing system complexity compared to standard TRIACs requiring external gate drivers.

Replacement Considerations

The ACST1210-7G is documented as a similar replacement option from the same manufacturer, offering comparable functionality within the STMicroelectronics portfolio.