T1635H-8I

Triacs Overview

The T1635H-8I is a high-temperature Triac from the ST H-Series, rated for 16 A RMS on-state current and 800 V symmetrical blocking voltage. It operates with a maximum junction temperature of 150 °C and features Snubberless technology for robust commutation. The device utilizes a TO-220AB insulated package with an internal ceramic pad providing 2500 VRMS insulation. Key electrical parameters include a gate trigger current (IGT) max of 35 mA, static dV/dt immunity min of 2000 V/µs at 150 °C, and critical turn-off commutation (dl/dt)c min of 16 A/ms.

Triacs Feature Summary

• High noise immunity and robust dynamic turn-off commutation up to maximum junction temperature
• Snubberless operation capability without external RC networks under specified limits
• Internal ceramic pad provides recognized voltage insulation rated at 2500 VRMS
• Three triggering quadrants support versatile control circuit designs

Triacs Applications

• General purpose AC line load control
• AC induction and universal motor control
• Lighting and automation I/O control
• Water heater, room heater and coffee machine
• Home automation smart AC plug
• Inrush current limiter in AC DC rectifiers

Triacs Procurement Notes

Verify component authenticity by checking the marking code 'T1635H-8I' against the datasheet specifications. Confirm the package type is TO-220AB Insulated and ensure compliance with ECOPACK2 environmental standards. Cross-reference the ordering code with official STMicroelectronics documentation to validate the specific suffix configuration before integration into production systems.

Triacs Selection Notes

Select this component when applications require operation at elevated temperatures up to 150 °C and demand high noise immunity. The TO-220AB insulated package facilitates heatsink size reduction compared to non-insulated alternatives. Ensure the design respects the absolute maximum ratings for repetitive peak off-state voltage and surge currents to maintain reliability in constraining environments.

Triacs Part Context

This Triac belongs to the ST H-Series, which is specifically engineered for high-temperature performance and enhanced commutation capabilities. The series targets demanding home appliance and industrial control environments where compact drive solutions and reliable switching are critical. The T1635H-8I variant offers a balance of medium current handling and high voltage blocking within an insulated form factor.

Triacs Replacement Considerations

Direct substitutes within the same family include T1635H-8G (D2PAK package) and T1635H-8I variants with different packing options. For higher current requirements, consider the T2035H-8I. Verify that any replacement maintains the TO-220AB insulated package and 2500 VRMS insulation rating if electrical isolation is required.