ACS108-6SUF-TR

Overview

The ACS108-6SUF-TR is an overvoltage protected AC switch from STMicroelectronics, utilizing A.S.D.® technology in a SMBflat-3L surface-mount package. It features a maximum on-state RMS current of 0.8 A and a repetitive peak reverse voltage of 600 V. The device requires a maximum gate trigger current of 10 mA and operates within a junction temperature range of -30°C to +125°C. It includes integrated overvoltage crowbar protection and high noise immunity against static dV/dt exceeding 500 V/µs.

Feature Summary

• Integrated overvoltage crowbar structure absorbs inductive turn-off energy and withstands IEC 61000-4-5 surge events without external varistors or snubbers.
• Gate level shifter driver separates the digital controller from the main switch, enabling direct interface with microcontrollers using negative gate current triggering.
• Common package tab connection supports parallel connection of multiple switches on a shared cooling pad for thermal management.

Applications

• Alternating current on/off static switching in appliances and industrial control systems
• Drive of low power high inductive loads such as relays, valves, solenoids, door locks, pumps, fans, and low power motors

Procurement Notes

Verify the specific ordering code ACS108-6SUF-TR against official manufacturer documentation to confirm the SMBflat-3L package and tape-and-reel delivery format. Ensure compatibility with the required operating temperature range and electrical ratings before finalizing procurement specifications.

Selection Notes

Select this component when designing circuits requiring robust overvoltage protection for inductive loads without external suppression components. Verify that the load current does not exceed the 0.8 A RMS rating and that the gate drive circuitry provides sufficient negative current to trigger the device reliably.

Part Context

This part belongs to the ACS™ (AC Switch) family built on A.S.D.® technology. It replaces standard triacs in applications requiring high surge immunity and simplified bill of materials by integrating protection functions directly into the semiconductor die.

Replacement Considerations

Direct replacements must match the SMBflat-3L footprint and 600V/0.8A ratings. Verify pinout compatibility for COM, OUT, and G terminals. Check if alternative packages like TO-92 or SOT-223 are acceptable for the mechanical design.

FAQ

How does the ACS108-6S handle inductive load turn-off?

It uses an integrated overvoltage clamping structure to absorb the energy generated during the turn-off of high inductive loads, limiting the voltage spike to the clamping voltage VCL.

What is the trigger mechanism for this device?

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

Does this component require external protection components?

No, the integrated overvoltage crowbar technology eliminates the need for external snubbers or varistors for standard surge protection scenarios.