T850H-6T

Overview

The STMicroelectronics T850H-6T is an H-series triac designed for general-purpose mains power AC switching applications. It features a rated average on-state current of 8A and supports a maximum junction temperature of 150°C. The device offers a repetitive peak reverse voltage and forward blocking voltage of 600V, with a surge current rating of 84A. Key electrical parameters include a maximum holding current of 75mA, a peak on-state voltage of 1.5V, and a maximum gate trigger current of 50mA at 1V. Packaged in a TO-220AB through-hole format with three pins, it measures 10.4mm in length, 4.6mm in width, and 15.9mm in height, operating within a temperature range of -40°C to +150°C.

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
• Very high three-quadrant commutation capability

Applications

• General purpose mains power AC switching
• Light dimmer circuits
• Motor speed control systems

Procurement Notes

Verify the specific suffix 'T' indicates the TO-220AB package configuration as documented in official component specifications. Confirm that the 600V voltage rating aligns with system requirements. Ensure compliance with RoHS directives and UL certification file E81734 for intended market deployment. Cross-reference datasheet revisions to confirm parameter stability.

Selection Notes

Select this component when an 8A RMS current rating and 600V blocking voltage are required for AC load control. The 150°C junction temperature rating allows for reduced heatsink size compared to traditional triacs. Verify that the 75mA holding current and 50mA gate trigger current match the driving circuit capabilities. Ensure the TO-220AB package fits the mechanical constraints of the design.

Part Context

The T850H-6T belongs to STMicroelectronics' H-series triacs, which are engineered for medium current applications. This series shares common characteristics such as high-temperature performance and internal insulation. It is part of a broader family including variants like T850H-6G and T2035H, differentiated by current ratings and packaging options while maintaining similar core electrical behaviors.

Replacement Considerations

Direct substitutes within the same series include T850H-6G, which shares identical electrical specifications but may differ in packaging or tape-and-reel configuration. Other H-series triacs like T2035H offer higher current ratings (20A) and should be evaluated if increased capacity is needed. Ensure pinout compatibility and thermal management requirements remain consistent during substitution.