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ACST410-8B

ACST410-8B Description

The ACST410-8B from STMicroelectronics is a high-performance TRIAC (Triode for Alternating Current) designed for surface-mount applications, packaged in a DPAK form factor. This 800V, 4A (RMS) device is part of the ACS™/A.S.D® series, offering robust switching capabilities for AC load control. With a gate trigger current (Igt) of 10 mA max and a low gate trigger voltage (Vgt) of 1V max, it ensures efficient triggering with minimal drive requirements. The 800V off-state voltage rating makes it suitable for high-voltage environments, while its 30A/32A non-repetitive surge current (Itsm) ensures reliability under transient conditions.

ACST410-8B Features

• High Voltage Rating: 800V off-state voltage for robust performance in demanding applications.
• Low Trigger Requirements: 1V max Vgt and 10 mA max Igt for easy drive compatibility.
• High Surge Current: 30A (50Hz)/32A (60Hz) Itsm for handling inrush currents.
• Surface-Mount Design: DPAK package for compact PCB integration.
• Compliance: ROHS3 Compliant and REACH Unaffected, meeting environmental standards.
• Obsolete Status: While still functional, designers should note its obsolete status for new designs.

ACST410-8B Applications

The ACST410-8B excels in AC load switching and phase-control applications, including:

• Home Appliances: Motor controls in washing machines, vacuum cleaners.
• Industrial Systems: Solid-state relays, heating controls, and lighting dimmers.
• Power Tools: Speed controllers for drills and saws.
• Automotive Auxiliary Systems: Low-power AC switching in auxiliary circuits.

Conclusion of ACST410-8B

The ACST410-8B is a reliable TRIAC for medium-power AC switching, offering low trigger requirements, high surge tolerance, and compact packaging. While obsolete, its 800V rating and 4A RMS current make it a viable choice for legacy designs or replacements. Ideal for appliances, industrial controls, and power tools, it balances performance with ease of integration. Engineers should evaluate alternative modern solutions for new designs while leveraging this part for maintenance or upgrades.