T850H-6I

Overview

The T850H-6I is an 8 A, 600 V high-temperature Triac from the H-Series. It features a non-repetitive peak on-state current of 84 A and a maximum off-state leakage current of 5 uA at VDRM. The device has an on-state voltage of 1.5 V, with a maximum holding current of 35 mA. Gate triggering requirements are specified as 1 V for VGT and 35 mA for IGT. Operating temperatures range from -40 °C to +150 °C. It utilizes a TO-220-3 through-hole package.

Feature Summary

• High-temperature operation capability up to 150 °C junction temperature
• Internal ceramic pad providing 2500 V RMS voltage insulation
• Low thermal resistance achieved through clip bonding technology
• High three-quadrant commutation capability for AC switching

Applications

• General purpose mains power AC switching
• Static relays
• Heating regulation systems
• Induction motor starting circuits
• Phase control in light dimmers and motor speed controllers

Procurement Notes

Verify the specific ordering suffix against official STMicroelectronics documentation to confirm pinout and insulation ratings. Ensure the procurement channel provides valid traceability for RoHS compliance and UL certification status. Confirm that the delivered component matches the exact H-Series designation to guarantee thermal performance specifications.

Selection Notes

Select this component when applications require robust AC switching with high thermal endurance. The 8 A rating suits medium-power loads, while the 600 V blocking voltage handles standard mains potentials. Verify that gate drive circuits can supply the required 35 mA trigger current. Consider the TO-220-3 package dimensions for mechanical integration and heatsinking requirements.

Part Context

This part belongs to the STMicroelectronics H-Series Triacs, designed for general-purpose mains power AC switching. The series offers high switching capabilities up to 150 °C junction temperatures, allowing for reduced heatsink sizes compared to traditional devices. These components utilize internal ceramic pads for electrical insulation and comply with RoHS directives.

Replacement Considerations

T850H-6G: Same 8 A / 600 V specification but potentially different packaging or suffix designation.