T635T-8T

Overview

The T635T-8T is a Snubberless Triac from STMicroelectronics, rated for 6 A RMS on-state current and 800 V blocking voltage. It operates within a junction temperature range of -40°C to +150°C and utilizes a TO-220 through-hole package. Key electrical parameters include a maximum non-repetitive surge current of 126 A at 60 Hz, a peak gate trigger current of 35 mA, and a maximum gate trigger voltage of 1.3 V. The device maintains a maximum holding current of 40 mA and supports three-quadrant triggering.

Feature Summary

• Snubberless design allows operation without external RC snubber circuits when datasheet limits are respected
• High static and dynamic commutation capabilities ensure reliable switching performance
• Three-quadrant triggering configuration provides flexible gate control options

Applications

• General purpose AC switching applications requiring high commutation capability
• On/off control functions in AC power systems
• Phase angle control circuits for general purpose loads

Procurement Notes

Verify the specific ordering suffix matches the required package type and environmental compliance standards before procurement. Confirm that the component meets RoHS3 specifications and check for any recent product change notifications or lifecycle status updates to ensure long-term availability and supply chain stability.

Selection Notes

Select this component for medium current AC switching applications where high dV/dt immunity and turn-off commutation are critical. Ensure the circuit design respects the defined limits to utilize the snubberless feature effectively. Consider the thermal management requirements associated with the TO-220 package for the intended operating environment.

Part Context

This part belongs to the T-Series Triacs family from STMicroelectronics, designed for robust AC power control. It shares the Snubberless technology with other series members like the T1635T-8T and T2035T-8G, offering similar functional benefits but tailored for different current ratings and package configurations.

Replacement Considerations

Direct replacements within the same series include the T635T-8G (D2PAK package) for surface mount needs. Other compatible devices may include variants from the H-Series or T-Series with matching voltage and current ratings, provided the package and pinout compatibility are verified.