ACS108-6SA

Overview

The ACS108-6SA is a single-phase AC switch built with A.S.D.® technology, packaged in TO-92 for through-hole mounting. It features an integrated overvoltage crowbar structure and gate level shifter driver. The device supports an on-state RMS current of 0.45 A at Tamb = 64 °C or 0.8 A at Tlead = 76 °C, with a non-repetitive surge peak current of 13.7 A (tp = 16.7 ms). Rated for 600 V blocking voltage, it triggers via negative gate current with a maximum IGT of 10 mA and VGT of 1.0 V. Operating junction temperature ranges from -30 °C to +125 °C.

Feature Summary

• Integrates overvoltage crowbar technology to absorb inductive turn-off energy and withstand mains transients up to 2 kV without external snubbers or varistors.
• Includes a gate level shifter driver that electrically separates the digital controller from the main switch, enabling direct microcontroller interfacing.
• Features high noise immunity against static dV/dt and IEC 61000-4-4 burst disturbances.
• Utilizes a common package tab connection to support the parallel connection of multiple AC switches on a shared cooling pad.

Applications

• Alternating current on/off static switching in 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 packaging configuration, as bulk, tape-and-reel, and ammopack variants exist within the same part family. Confirm environmental compliance status and RoHS specifications directly with the manufacturer prior to procurement. Ensure the selected package matches the intended PCB footprint and thermal management requirements.

Selection Notes

Select this component when designing circuits requiring integrated overvoltage protection to eliminate external clamping components. Verify that the load current remains within the specified RMS limits based on the available heat sinking conditions. Ensure the driving circuit provides a negative gate current pulse exceeding 10 mA to guarantee reliable triggering across the full operating temperature range.

Part Context

The ACS108-6SA belongs to the ACS™ series of overvoltage protected AC switches manufactured by STMicroelectronics. This series utilizes proprietary A.S.D.® technology to provide robust performance in AC mains applications. The device replaces traditional triacs combined with external protection networks, significantly reducing the overall component count and simplifying the design process for AC switching systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics resources for potential cross-reference options or updated product recommendations if discontinuation occurs.