T835T-6I

Overview

The T835T-6I is an 8 A Snubberless™ logic level Triac from STMicroelectronics, designed for general-purpose AC switching applications. It features a repetitive peak off-state voltage (VDRM) of 600 V and operates in a through-hole TO-220-3 package. Key electrical parameters include a maximum on-state RMS current (IT(RMS)) of 8 A, a gate trigger current (IGT) maximum of 35 mA, and a gate trigger voltage (VGT) maximum of 1.3 V. The device supports a non-repetitive surge current of 60 A at 50 Hz and 63 A at 60 Hz. It offers high static and dynamic commutation capabilities, allowing operation without external snubber circuits under specified limits. The junction temperature range spans from -40°C to 125°C.

Feature Summary

• Snubberless design enables direct use on inductive loads without external RC networks when operating within defined limits.
• Logic level triggering allows direct interface with low-power drivers such as microcontrollers due to low gate current requirements.
• High commutation performance ensures reliable switching in general-purpose AC control applications.

Applications

• Phase angle control in light dimmers
• Motor speed controllers
• Heating regulation systems

Procurement Notes

Verify the specific ordering suffix 'I' corresponds to the insulated TO-220AB package variant with 2500 Vrms insulation rating. Confirm RoHS compliance status matches REACH regulations. Check manufacturer documentation for any recent product change notices affecting pinout or thermal characteristics before finalizing procurement specifications.

Selection Notes

Select this component for AC switching circuits requiring high commutation capability without snubber circuitry. Ensure the load current does not exceed the 8 A RMS rating and that the gate driver can supply at least 35 mA. Verify that the 600 V blocking voltage meets the peak line voltage requirements of the application environment.

Part Context

The T835T-6I belongs to the T8T series of medium current Triacs. This family includes surface-mount and through-hole variants designed for value-sensitive appliances. The series is characterized by low thermal resistance clip bonding and UL certification for insulated packages, providing a standardized solution for AC power control.

Replacement Considerations

The T835H-6I is a related high-temperature variant within the same family. It shares similar electrical ratings but differs in maximum junction temperature and surge current specifications. Verify thermal management requirements before substituting, as the H-series may offer different thermal performance characteristics.