T835-800B

Overview

The STMicroelectronics T835-800B is an 8 A Snubberless triac housed in a DPAK-3 (TO-252-3) surface-mount package. It features a rated repetitive off-state voltage of 800 V and supports junction temperatures up to +150 °C. Key electrical parameters include an on-state RMS current of 8 A, non-repetitive peak on-state current of 80 A, and maximum holding current of 35 mA. The device exhibits a typical on-state voltage of 1.55 V, gate trigger voltage of 1.3 V, and gate trigger current of 35 mA. Leakage current at VDRM is specified at 5 µA.

Feature Summary

• Snubberless design enables direct switching of inductive loads without external RC snubber circuits
• High commutation performance ensures reliable turn-off under demanding load conditions
• Logic-level interface allows direct connection to low-power drivers such as microcontrollers

Applications

• Static relays for AC switching
• Heating regulation systems
• Induction motor starting circuits
• Phase control in light dimmers
• Motor speed controllers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm package type and thermal rating. Confirm RoHS compliance status and lead times through authorized distributors. Ensure the procurement channel provides valid traceability documentation for industrial applications.

Selection Notes

Select this component when high commutation capability is required for inductive loads in compact surface-mount designs. The 800 V rating suits general-purpose AC switching where higher blocking voltage is needed compared to 600 V variants. Verify that the DPAK-3 package thermal resistance meets the system's heat dissipation requirements.

Part Context

The T835-800B belongs to the T835 series of Snubberless triacs from STMicroelectronics. This series includes various voltage ratings and packages, such as the T835-8G and T835T-8I. The 'B' suffix typically denotes the specific voltage rating and package configuration within the family.

Replacement Considerations

Direct replacements must match the 8 A current, 800 V voltage, and DPAK-3 package. Consider the T835-800B-TR for tape-and-reel packaging if different handling is required. Verify compatibility with existing PCB footprints and thermal management solutions.