T850H-6G

Overview

The T850H-6G is an H-series bidirectional thyristor (Triac) manufactured by STMicroelectronics, designed for high-temperature AC power switching applications. It features a maximum on-state RMS current of 8 A and a repetitive peak off-state voltage rating of 600 V. The device supports a maximum junction temperature of +150 °C and operates within a temperature range of -40 °C to +150 °C. Key electrical parameters include a non-repetitive peak on-state current of 84 A, a holding current maximum of 75 mA, and a gate trigger voltage of 1 V with a gate trigger current of 50 mA. It exhibits an on-state voltage of 1.5 V and a low off-state leakage current of 5 µA at VDRM. Packaged in a surface-mount D2PAK format, it incorporates internal ceramic insulation rated at 2500 V RMS.

Feature Summary

• Snubberless design optimized for high commutation performance on inductive loads
• High thermal stability supporting operation up to 150 °C junction temperature
• Internal ceramic pad providing 2500 V RMS voltage insulation

Applications

• General purpose mains power AC switching
• Static relay ON/OFF control functions
• Heating regulation systems
• Induction motor starting circuits
• Phase control in light dimmers and motor speed controllers

Procurement Notes

Verify the specific ordering suffix to confirm package type and tape/reel configuration, as variations exist within the T850H series. Ensure compliance with RoHS directives and REACH SVHC requirements for the intended market. Confirm UL certification file E81734 status if safety isolation is required. Validate that the 600 V rating aligns with the system's peak line voltage and transient immunity needs.

Selection Notes

Select this component when designing circuits requiring robust handling of inductive load transients without external snubber networks. The 50 mA gate trigger current facilitates direct interfacing with microcontroller ports or low-power drivers. Consider the D2PAK package for surface mount assembly where space efficiency and thermal dissipation are priorities. Verify that the 8 A RMS current capacity meets the continuous load requirements of the application.

Part Context

The T850H-6G belongs to STMicroelectronics' T850H series of medium-current Triacs. This family is characterized by its Snubberless technology, which simplifies circuit design by eliminating the need for RC snubber networks across the main terminals. The series is engineered for reliability in harsh electrical environments, offering improved turn-off commutation capabilities compared to standard Triacs.

Replacement Considerations

Cross-reference with other STMicroelectronics T8xxH series devices for similar current ratings. Verify pinout compatibility and thermal resistance characteristics when substituting with components from other manufacturers. Ensure the replacement device maintains the 600 V blocking voltage and 150 °C operating temperature limits.