T835T-8T

Overview

The T835T-8T is an 8 A Snubberless Triac designed for general-purpose AC switching applications. It supports on/off and phase angle control functions, offering high commutation capability suitable for inductive loads. The device operates within a junction temperature range of -40 °C to +150 °C. Key electrical parameters include an RMS on-state current (IT(RMS)) of 8 A, a repetitive peak off-state voltage (VDRM) of 800 V, and a maximum holding current (Ih) of 40 mA. It features a gate trigger voltage (Vgt) of 1.3 V and a gate trigger current (Igt) of 35 mA. The component utilizes a through-hole package configuration.

Feature Summary

• Snubberless design eliminates the need for external RC snubber circuits when operating within defined limits
• High static dV/dt and dynamic turn-off commutation (dl/dt)c provide immunity to false triggering
• Extended thermal performance with a maximum junction temperature rating of 150 °C
• Three-quadrant triggering capability for versatile gate drive integration

Applications

• General purpose AC switching
• Phase angle control in light dimmers
• Motor speed controllers
• Heating regulation systems

Procurement Notes

Verify the specific package type and insulation requirements against the official STMicroelectronics datasheet before procurement. Confirm that the application circuit respects the defined limits for snubberless operation to ensure reliable performance. Check for any RoHS compliance documentation if environmental regulations apply to the final assembly.

Selection Notes

Select this component for applications requiring high commutation capability on inductive loads without the complexity of external snubber networks. Ensure the gate driver can supply at least 35 mA to guarantee reliable triggering. Consider the 150 °C junction temperature limit for thermal management in enclosed environments compared to standard 125 °C rated devices.

Part Context

The T835T-8T belongs to the T835T series of Snubberless Triacs from STMicroelectronics. This series is engineered for medium current AC switching applications where reliability and simplified circuit design are priorities. The 'T' suffix typically denotes a specific through-hole package variant within the broader T835 family, which also includes surface-mount options like the T835T-8G.

Replacement Considerations

Direct replacements may include other 8 A Snubberless Triacs from the same manufacturer, such as the T835T-8G (surface mount) or T835T-8I (insulated tab). Verify pinout compatibility and thermal resistance characteristics when substituting packages.