T825T-6I

Overview

The T825T-6I is an 8 A Snubberless logic level Triac from STMicroelectronics, designed for general-purpose AC switching applications requiring high commutation capability. It operates with a rated repetitive off-state voltage (VDRM) of 600 V and supports a non-repetitive peak on-state current of 63 A. The device features a low on-state voltage of 1.6 V and a maximum holding current of 25 mA. It is housed in a TO-220AB-3 through-hole package, offering a junction temperature range from -40 °C to +150 °C. The component provides 2500 V rms insulation when mounted in the insulated package variant.

Feature Summary

• Snubberless design eliminates the need for external RC snubber circuits across the main terminals.
• Logic-level gate sensitivity allows direct interfacing with standard digital logic families.
• High static and dynamic commutation capability ensures reliable operation under demanding load conditions.

Applications

• On/off control functions in general-purpose AC switching circuits
• Phase angle control for light dimmers and motor speed controllers
• Solid-state relays and AC power regulation modules

Procurement Notes

Verify the specific suffix against the manufacturer's official datasheet to confirm exact electrical tolerances and thermal characteristics. Ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee authenticity. Confirm RoHS compliance status and packaging type requirements prior to ordering to align with assembly specifications.

Selection Notes

Select this component for medium-current AC applications where high commutation reliability is critical. The 600 V rating suits standard single-phase mains voltages. Consider the TO-220AB package for through-hole mounting and adequate heat dissipation without excessive heatsinking in moderate duty cycles.

Part Context

The T825T-6I belongs to the T8T series of Triacs manufactured by STMicroelectronics. This series is characterized by its Snubberless technology and logic-level gate drive compatibility. It is part of a broader family of thyristors designed for value-sensitive appliances requiring robust AC switching performance.

Replacement Considerations

Direct substitutes within the same series include the T820T-6I and T835T-6I, which share similar 8 A ratings and 600 V blocking capabilities but may differ in gate trigger currents or holding currents. Verify pinout compatibility and thermal resistance parameters before substitution.