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ACS108-8SN-TR

ACS108-8SN-TR

STMicroelectronics
TRIAC Logic - Sensitive Gate 800 V 800 mA Surface Mount SOT-223
Active8,171 in stock
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Overview

The ACS108-8SN-TR is a high-performance AC switch (TRIAC) designed for direct control by microcontrollers. It features integrated overvoltage crowbar technology and high noise immunity, eliminating the need for external snubbers or varistors in many low-power AC switching designs.

Why Choose This Part

The device features an 800V off-state voltage and logic-level gate triggering (10mA max), allowing direct MCU interfacing without additional amplification. Its built-in protection against dV/dt transients and IEC 61000-4-4 bursts can reduce external component counts by up to 80% compared to traditional TRIAC circuits.

Applications

Appliance Control
Ideal for driving small AC loads in washing machines, dishwashers, and refrigerators including solenoids and door locks.
HVAC Systems
Used for controlling air flow dampers, small fans, and valve actuators in climate control units.
Industrial Solenoids
Directly switches inductive loads such as dispensers and pneumatic valves in automated industrial lines.
Lighting Control
Solid-state switching for low-power lamps and residential lighting automation modules.

Key Specifications

Triac Type Logic - Sensitive Gate
Configuration Single
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Voltage - Off State 800 V
Operating Temperature -30degC ~ 125degC (TJ)
Supplier Device Package SOT-223
Current - Hold (Ih) (Max) 10 mA
Current - Gate Trigger (Igt) (Max) 10 mA
Voltage - Gate Trigger (Vgt) (Max) 1 V
Current - On State (It (RMS)) (Max) 800 mA
Current - Non Rep. Surge 50, 60Hz (Itsm) 13A, 13.7A

Getting Started

When designing with the ACS108, ensure the SOT-223 package tab is connected to the common AC line to simplify thermal management. Verification can be performed using an MCU GPIO with a current-limiting resistor to meet the 10mA Igt requirement.

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