STMicroelectronics T2035H-6I

Overview

T2035H-6I from STMicroelectronics is a 20 A, 600 V insulated TO-220AB snubberless triac designed for high-power AC mains switching in universal motor control circuits. It delivers 35 mA maximum gate trigger current (IGT), supports 150 °C junction operation, and features internal ceramic insulation rated at 2500 VRMS - enabling direct mounting to grounded heatsinks in vacuum cleaner and washing machine drum motor drives.

For engineers reviewing the T2035H-6I datasheet, T2035H-6I pinout, T2035H-6I application, or T2035H-6I equivalent, key selection criteria include its 1000 V/µs dV/dt immunity at 150 °C, 27 A/ms critical commutation current (dl/dt)c, low 1.9 °C/W junction-to-case thermal resistance, and UL certification (E81734) for safety-critical appliance designs.

Technical Context

This H-series triac operates across all three quadrants with enhanced turn-off commutation robustness up to 150 °C junction temperature. Its snubberless architecture eliminates external RC networks by sustaining 1000 V/µs dV/dt (at Tj = 150 °C) and 27 A/ms (dl/dt)c without gate assistance.

The TO-220AB Insulated package integrates a ceramic isolation pad between the metal tab and die, providing 2500 VRMS basic insulation and enabling safe mounting on conductive chassis. Thermal performance is optimized via clip bonding, achieving Rth(j–c) = 1.9 °C/W - 30% lower than standard insulated triacs of comparable rating.

Key Specifications

Pinout & Package

TO-220AB Insulated package with electrically isolated metal tab (2500 VRMS isolation). Mounting hole centered at 15.8 mm from top edge; leads spaced 2.4 mm apart; tab thickness 0.49–0.70 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac-based AC switching applications.

Compared with T2050H-6I, T2035H-6I provides lower gate drive burden ideal for microcontroller-direct interfaces; versus T2035H-6T, it eliminates insulator hardware and simplifies thermal assembly while maintaining identical switching performance.

Availability

T2035H-6I is available at Aetrix Electronics and suitable for vacuum cleaner motor control, washing machine drum drive, and industrial fan speed regulation requiring stable component supply across extended production lifecycles.

Supply support for T2035H-6I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

T2035H-6I belongs to ST's H-series snubberless triac product line, engineered specifically for high-reliability, high-power-density AC motor control in white goods and power tools where thermal robustness and safety isolation are critical.

FAQ

What is the maximum allowable case temperature for continuous 20 A operation?

The T2035H-6I supports 20 A RMS continuous current at Tc = 108 °C, as specified in Table 1 of DS5314 Rev 6. This is enabled by its 1.9 °C/W junction-to-case thermal resistance and 150 °C maximum junction temperature rating - allowing operation in thermally constrained enclosures without forced cooling.

Does T2035H-6I require an external snubber circuit?

No. The T2035H-6I is a certified snubberless triac with guaranteed 1000 V/µs dV/dt immunity at 150 °C junction temperature and 27 A/ms critical commutation current (dl/dt)c. These specifications eliminate the need for external RC snubbers in typical universal motor and resistive load applications.

How does the insulated TO-220AB package differ from standard TO-220AB?

The TO-220AB Insulated variant integrates a ceramic isolation layer between the silicon die and metal tab, providing 2500 VRMS basic insulation. This allows direct mounting to grounded metal chassis without additional insulating hardware - unlike standard TO-220AB, which requires mica washers or silicone pads for safety compliance.

Can T2035H-6I be used in bidirectional switching configurations?

Yes. As a three-quadrant triac, T2035H-6I supports gate-triggered conduction in Quadrants I, II, and III - enabling bidirectional AC switching in back-to-back configurations for reversible motor control, such as washing machine drum direction reversal, without requiring dual-device solutions.