ACS108-6SN-TR

Overview

The ACS108-6SN-TR is a surface-mount AC switch built with A.S.D.® technology, designed for direct microcontroller interfacing. It features an integrated overvoltage crowbar structure to absorb inductive turn-off energy and a gate level shifter driver. The device operates with a negative gate current flowing out of the gate pin. Key electrical parameters include a maximum on-state RMS current (IT(RMS)) of 0.8 A, a repetitive peak reverse voltage (VRRM) of 600 V, and a maximum gate trigger current (IGT) of 10 mA. It withstands non-repetitive line peak pulse voltages up to 2 kV and operates within a junction temperature range of -30 °C to +125 °C.

Feature Summary

• Enables equipment compliance with IEC 61000-4-5 surge standards through integrated overvoltage crowbar technology.
• Provides high noise immunity against static dV/dt and IEC 61000-4-4 burst disturbances without external snubbers or varistors.
• Interfaces directly with digital controllers via a gate level shifter driver that separates the logic from the main switch.
• Supports common package tab connections to facilitate the parallel connection of multiple switches on a single cooling pad.

Applications

• Alternating current on/off static switching in home appliances and industrial control systems.
• Driving low power high inductive loads such as relays, valves, solenoids, and dispensers.
• Controlling resistive loads including lamps, fans, pumps, and door locks.

Procurement Notes

Verify the specific ordering suffix to confirm the tape and reel packaging configuration. Ensure the component matches the SOT-223 footprint dimensions and lead-free plating specifications required by the assembly process. Confirm environmental compliance status against relevant RoHS directives before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring direct MCU interface without additional isolation components. The device is suitable for applications needing robust protection against mains transients and inductive kickback. Verify that the load current remains within the 0.8 A RMS limit and that the PCB copper area supports the necessary thermal dissipation for the operating environment.

Part Context

This part belongs to the ACS™ family of AC switches manufactured by STMicroelectronics. These devices utilize proprietary A.S.D.® technology to integrate protection features typically found in discrete solutions. The series offers various current ratings and packages to support different load requirements in consumer electronics and industrial automation.

Replacement Considerations

Direct replacements must match the 600 V rating, 0.8 A current capacity, and SOT-223 package. Verify that substitute parts also feature negative gate triggering and comparable overvoltage clamping capabilities to maintain system integrity without redesigning the protection circuitry.

FAQ

How does the ACS108-6SN handle overvoltage during the turn-off of inductive loads?

It utilizes an integrated overvoltage crowbar structure that clamps the voltage generated by the collapsing magnetic field, safely dissipating the stored inductive energy without requiring external snubber circuits.

What is the polarity of the gate current required to trigger the device?

The device is triggered by a negative gate current flowing out of the gate pin, allowing it to interface directly with standard digital controller outputs.

Does the device require external components for surge protection?

No, the integrated overvoltage crowbar technology allows the device to meet IEC 61000-4-5 surge standards without external varistors or snubbers, reducing the overall component count.