STMicroelectronics T3035H-6I

Overview

T3035H-6I from STMicroelectronics is a 30 A, 600 V snubberless triac in insulated TO-220AB package, designed for high-noise industrial AC load control. It delivers 35 mA gate trigger current, 1000 V/µs dV/dt immunity at 150 °C junction temperature, and 0.80 V threshold voltage at Tj = 150 °C-enabling robust universal motor control in power tools and major appliances without external snubbers.

For engineers reviewing the T3035H-6I datasheet, T3035H-6I pinout, T3035H-6I application, or T3035H-6I equivalent, key selection criteria include its 1.6 °C/W junction-to-case thermal resistance, 2500 VRMS internal ceramic insulation, 33 A/ms critical commutation rate at 150 °C, and RoHS/UL E81734 compliance for safety-critical embedded control.

Technical Context

This triac uses ST's Snubberless technology to guarantee specified minimum commutation performance and high electrical noise immunity across its full operating junction temperature range (−40 to +150 °C). Its internal ceramic pad provides reinforced 2500 VRMS isolation between A2 and heatsink, eliminating need for insulating washers in TO-220AB Ins. mounting.

The device operates in all three quadrants with validated dynamic behavior up to 150 °C, supporting reliable switching of inductive loads such as universal motors and solenoids. Its low on-state resistance (15 mΩ at Tj = 150 °C) and optimized thermal dissipation enable heatsink size reduction versus electromechanical alternatives.

Key Specifications

Pinout & Package

TO-220AB Insulated package with integrated ceramic insulating pad between tab (A2) and heatsink. Tab is electrically connected to A2 terminal; no external insulator required. Standard 3-pin through-hole mounting with 0.55 N·m recommended torque.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar snubberless triac applications.

Compared with BTB36-600BW, T3035H-6I trades 6 A current headroom for built-in 2500 VRMS isolation and lower gate drive demand; compared with T3050H-6I, it offers lower IGT and reduced conduction loss at the cost of 500 V/µs lower dV/dt immunity-making it optimal for cost-sensitive, thermally constrained universal motor control.

Availability

T3035H-6I is available at Aetrix Electronics and suitable for power tool motor control, major appliance heating/actuation, and industrial AC load switching requiring stable component supply, long-term lifecycle support, and certified isolation.

Supply support for T3035H-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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The T30xxH series belongs to ST's high-temperature snubberless triac product line, engineered specifically for solid-state replacement of electromechanical relays in thermally demanding AC control applications.

FAQ

What is the maximum allowable case temperature for continuous 30 A RMS operation?

The T3035H-6I supports 30 A RMS continuous conduction at Tc = 92 °C in the insulated TO-220AB package, as specified in Table 1 of DS6689. Exceeding this temperature requires derating per Figure 2, where IT(RMS) drops to ~22 A at Tc = 110 °C.

Does the internal ceramic insulation eliminate the need for external insulating hardware?

Yes-the integrated 2500 VRMS ceramic pad electrically isolates the A2 terminal (tab) from the heatsink, removing the requirement for mica washers or silicone pads. Mounting torque must remain within 0.55–0.70 N·m to avoid cracking the ceramic layer.

Can T3035H-6I replace mechanical relays in Class I appliances?

Yes-its UL E81734 certification, 2500 VRMS reinforced insulation, and RoHS compliance meet IEC 60335-1 requirements for household and similar electrical appliances, provided PCB layout maintains creepage/clearance distances per the standard.

How does the 1000 V/µs dV/dt immunity at 150 °C impact system-level EMI robustness?

This specification ensures the triac will not false-trigger when exposed to fast-rising voltage transients-such as those generated by nearby contactors or variable-frequency drives-without requiring additional RC snubbers, thereby simplifying board layout and improving long-term reliability in noisy industrial cabinets.