ACS108-8TN-TR

Overview

The ACS108-8TN-TR is an overvoltage protected AC switch built with A.S.D. technology, designed for alternating current static switching in appliances and industrial control systems. It controls loads up to 0.8 A RMS at 800 V blocking voltage. The device features an integrated overvoltage crowbar structure to absorb inductive turn-off energy and a gate level shifter driver that separates the digital controller from the main switch. Triggered by negative gate current flowing out of the gate pin, it requires no external snubber or varistor. Packaged in SOT-223 tape and reel.

Feature Summary

• Overvoltage crowbar technology enables equipment to meet IEC 61000-4-5 surge standards without external protection components
• High noise immunity against static dV/dt and IEC 61000-4-4 burst conditions
• Gate level shifter driver isolates the digital controller from the main switch
• Interfaces directly with microcontrollers using ECOPACK compliant packaging

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
• Driving low power resistive loads including pumps, fans, low power motors, door locks, and lamps

Procurement Notes

Verify the specific ordering code matches the required packing configuration. The suffix TR indicates delivery in tape and reel format with a base quantity of 1000 units. Confirm package type is SOT-223 and sensitivity class is 5 mA. Ensure compliance requirements align with ECOPACK specifications before finalizing procurement orders.

Selection Notes

Select this component for applications requiring direct microcontroller interface without additional isolation circuitry. The device handles inductive loads up to 15 H due to internal clamping capabilities. Verify thermal management requirements based on junction-to-ambient resistance values provided in the datasheet. Ensure gate drive signals provide sufficient negative current to trigger the sensitive gate effectively.

Part Context

This part belongs to the ACS108 series of AC switches manufactured by STMicroelectronics. The series utilizes A.S.D. technology for high performance switching. The ACS108-8TN variant specifically offers 0.8 A current handling and 800 V blocking capability. It is designed to replace standard triacs in applications needing robust transient protection and simplified circuit designs.

Replacement Considerations

Direct substitutes within the same family include the ACS108-8SA (TO-92 package) and ACS108-8FP (SO-8 package). These variants share identical electrical characteristics but differ in physical footprint and mounting style. Verify package compatibility and lead configuration when replacing the SOT-223 version.