ACS108-8SP-TR

Overview

The ACS108-8SP-TR is a bidirectional triac AC switch manufactured by STMicroelectronics, belonging to the ACS series. It features an integrated overvoltage crowbar structure designed to absorb inductive turn-off energy and a gate level shifter driver that isolates the digital controller from the main power switch. The device is triggered by a negative gate current flowing out of the gate pin. It operates within a temperature range of -30°C to +125°C and utilizes a SOT-223-2L package with high creepage distance characteristics.

Feature Summary

• Integrated overvoltage crowbar technology enables equipment compliance with IEC 61000-4-5 surge standards without external protection components.
• High noise immunity against static dV/dt and IEC 61000-4-4 burst events reduces circuit complexity.
• Gate level shifter driver separates the digital controller from the main switch for direct microcontroller interfacing.

Applications

• Appliance actuators such as water valves
• Drain pump control systems
• Equipment requiring IEC 61000-4-5 surge immunity

Procurement Notes

Verify component authenticity through authorized channels due to the presence of counterfeit risks in the semiconductor market. Confirm the specific suffix 'TR' indicates tape and reel packaging when sourcing. Ensure the supplier provides valid traceability documentation to guarantee the integrity of the STMicroelectronics manufacturing origin.

Selection Notes

Select this component for applications requiring high creepage distance in a compact SOT-223-2L package. The device eliminates the need for external MOVs or snubbers, reducing overall component count by up to 80%. Verify that the load current does not exceed the rated RMS capacity and that the system can accommodate the negative gate trigger current requirement.

Part Context

This part belongs to the ACS family of logic-level gate AC switches built with A.S.D. technology. These devices are designed for simple driving and sensitive-gate operation, targeting appliance actuators. The family offers various packages including SO-8, SO-20, SOT-223, and TO-92, providing flexibility for different thermal and spatial constraints in AC switching applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult official STMicroelectronics documentation for cross-reference recommendations or evaluate other members of the ACS108 series based on package and current rating compatibility.