STMicroelectronics T3050H-6I

Overview

T3050H-6I from STMicroelectronics is a 30 A, 600 V insulated TO-220AB snubberless triac designed for high-noise industrial AC load control. It delivers 50 mA gate trigger current (IGT), 150 °C junction operation, and 1.6 °C/W junction-to-case thermal resistance - enabling robust universal motor and inductive load switching in power tools and major appliances without external snubbers.

For engineers reviewing the T3050H-6I datasheet, T3050H-6I pinout, T3050H-6I application, or T3050H-6I equivalent, key selection criteria include its 1500 V/µs dV/dt immunity at Tj = 150 °C, 44 A/ms critical commutation rate, 2500 VRMS internal insulation, and verified performance under high-temperature, high-dI/dt inductive switching conditions.

Technical Context

This triac implements ST's Snubberless architecture with optimized gate structure and internal ceramic isolation, delivering guaranteed commutation across all three quadrants up to 150 °C junction temperature. Its low dynamic on-state resistance (15 mΩ at Tj = 150 °C) and threshold voltage (0.80 V) minimize conduction losses during continuous RMS current operation.

The device features dual-level protection: intrinsic high dV/dt immunity (1500 V/µs min.) eliminates false triggering in electrically noisy environments, while the insulated TO-220AB package provides 2500 VRMS galvanic isolation between main terminals and heatsink - critical for Class I appliance safety compliance and floating-ground motor drives.

Key Specifications

Pinout & Package

TO-220AB Insulated package with isolated metal tab (A2 terminal electrically separated from heatsink mounting surface). Dimensions per ST DS6689 Rev 9: A = 15.2–15.9 mm, B = 10.0–10.4 mm, L = 2.65–2.95 mm, weight = 2.3 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current, high-temperature triac applications.

Compared with BTB36-600BW and Q6035LH4, the T3050H-6I uniquely combines 30 A rating, 1500 V/µs dV/dt immunity, and 2500 VRMS isolation in a single TO-220AB package - making it optimal for compact, safety-certified, high-noise industrial motor controls where reliability under thermal and electrical stress is non-negotiable.

Availability

T3050H-6I is available at Aetrix Electronics and suitable for power tool motor control, washing machine drum drives, industrial conveyor belt drives, and commercial dishwasher heater control requiring stable component supply across extended production lifecycles.

Supply support for T3050H-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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The T3050H-6I belongs to ST's H-series snubberless triac product line, engineered specifically for high-temperature, high-noise AC load switching in safety-critical white goods and power tools - emphasizing reliability, reduced system complexity, and regulatory compliance.

FAQ

What is the maximum junction temperature and how does it affect continuous current rating?

The T3050H-6I is rated for continuous operation up to 150 °C junction temperature. At this temperature, its 30 A RMS current rating remains fully valid when case temperature is maintained at 92 °C - verified by ST's absolute maximum ratings table and derating curves. This enables sustained full-load operation in thermally demanding enclosures without active cooling.

Does the insulated TO-220AB package eliminate the need for external isolation hardware?

Yes - the internal ceramic pad provides 2500 VRMS isolation between A2 and the metal tab, satisfying IEC 60335-1 reinforced insulation requirements for Class I appliances. No additional insulating sleeves, washers, or barrier materials are required when mounting directly to grounded heatsinks.

Can the T3050H-6I replace traditional snubber-equipped triacs without circuit redesign?

Yes - its Snubberless architecture guarantees commutation across all quadrants without external RC networks, even at 150 °C. Designers can remove snubber components entirely while retaining identical timing and control logic; only gate drive strength (≥50 mA) must be confirmed.

How does the 1500 V/µs dV/dt immunity improve system reliability in motor control?

This specification ensures the device resists false triggering from high-frequency transients generated by universal motor brush arcing or inductive load switching - a common cause of erratic behavior in power tools. It eliminates reliance on layout-dependent filtering, enabling robust operation in compact, cost-optimized PCBs.