T820-800W

Overview

The T820W is an 800 V, 8 A snubberless TRIAC manufactured by STMicroelectronics. It is housed in a TO-220AB plastic package with an isolated case connection. Key electrical parameters include a maximum DC gate trigger current of 30 mA, a maximum DC gate trigger voltage of 1.5 V, and a holding current maximum of 50 mA. The device supports a critical rate of rise of commutation voltage (di/dt) of 20 V/us and a critical rate of rise of off-state voltage (dv/dt) of 300 V/us. Maximum leakage current is specified at 2 mA. The component operates within a temperature range from -40 °C to 125 °C and complies with EU RoHS standards.

Feature Summary

• Snubberless design eliminates the need for external RC networks, simplifying circuit layout.
• High static and dynamic commutation capability ensures reliable switching performance.
• Isolated package provides insulation rated at 2500 V rms for enhanced safety.

Applications

• General purpose AC switching
• On/off control functions
• Phase angle control applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm pinout configuration and packaging type. Ensure the selected variant matches the required voltage and current ratings for the target application. Cross-reference the part number with authorized distributors to confirm availability and authenticity. Check for any recent product lifecycle changes or obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component for applications requiring high dv/dt immunity without external snubber circuits. The TO-220AB package offers adequate thermal dissipation for medium current loads. Verify that the gate trigger requirements align with the driving logic levels. Consider the isolation rating if galvanic separation is necessary between control and power stages.

Part Context

The T820 series belongs to STMicroelectronics' family of medium current TRIACs designed for value-sensitive appliances. These devices are optimized for general-purpose AC switching where high commutation capability is essential. The series leverages clip bonding technology to achieve low thermal resistance, improving reliability under continuous operation.

Replacement Considerations

Consult official substitution guides for compatible TRIACs with matching 800 V/8 A ratings and TO-220AB packages. Verify pin compatibility and thermal characteristics before replacing the original component with alternatives from other manufacturers.