T835T-8FP

Overview

The STMicroelectronics T835T-8FP is an 8 A Snubberless™ Triac designed for general-purpose AC switching applications. It operates with a repetitive peak off-state voltage (VDRM) of 800 V and supports a maximum junction temperature of 150 °C. The device features a gate trigger current (IGT) of 35 mA and a gate trigger voltage (VGT) of 1.3 V, with a holding current (Ih) of 40 mA. Packaged in the TO-220FPAB through-hole format, it provides tab insulation rated at 2 kV RMS per UL standards. This component eliminates the need for external snubber circuits when operating within specified limits.

Feature Summary

• Snubberless operation capability for simplified circuit design
• High static dV/dt immunity to prevent false triggering
• Robust dynamic turn-off commutation performance
• Integrated ceramic pad for electrical isolation

Applications

• General purpose AC switching
• Static relays
• Heating regulation systems
• Induction motor starting circuits
• Light dimmers and motor speed controllers

Procurement Notes

Verify the specific suffix 'FP' corresponds to the TO-220FPAB package configuration. Confirm that the required insulation rating meets the 2 kV UL standard for your application safety requirements. Ensure the gate drive circuit can supply the necessary 35 mA trigger current. Check for any obsolete status updates from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when high commutation capability is required for inductive loads without adding external RC snubber networks. The 800 V rating suits standard mains voltage applications. The 150 °C junction temperature allows for higher thermal margins compared to standard 125 °C devices. Verify that the TO-220FPAB package fits the available PCB space and heatsinking constraints.

Part Context

This part belongs to the T835T series of Snubberless Triacs from STMicroelectronics. It shares core electrical characteristics with other variants like the T835T-8I but differs in packaging and insulation specifications. The series is engineered for medium-current AC control applications where reliability and noise immunity are critical.

Replacement Considerations

The T835T-8I is a direct functional substitute offering identical electrical ratings but housed in a TO-220AB insulated package. Both devices share the same Snubberless technology and 8 A current handling capabilities. Verify pinout compatibility and thermal resistance differences between the FPAB and AB packages during replacement.