STMicroelectronics T2050H-6T

Overview

T2050H-6T from STMicroelectronics is a 20 A, 600 V snubberless triac in TO-220AB package, designed for mains AC switching in universal motor control. It delivers 50 mA gate trigger current (IGT), supports 150 °C junction operation, and features 1000 V/µs dV/dt immunity at Tj = 150 °C - enabling robust commutation in vacuum cleaner and washing machine drum motor drives.

For engineers reviewing the T2050H-6T datasheet, T2050H-6T pinout, T2050H-6T application, or T2050H-6T equivalent, key selection criteria include its 27 A/ms critical turn-off di/dt (Tj = 150 °C), insulated thermal resistance (Rth(j-c) = 1.0 °C/W), 1.5 V on-state voltage at 28 A, and compliance with UL E81734 and RoHS 2002/95/EC.

Technical Context

This H-series triac operates across all three quadrants without external snubbers, leveraging optimized gate structure and low dynamic resistance (19 mΩ at Tj = 150 °C) to sustain high commutation margins under fast-reapplied voltage transients. Its 1000–1500 V/µs dV/dt rating (quadrant-dependent) and 27–36 A/ms (dl/dt)c ensure reliable turn-off in inductive loads like universal motors.

The device integrates an internal ceramic insulation pad rated at 2500 VRMS, enabling direct heatsink mounting without additional isolation hardware. Thermal performance is optimized via clip bonding - reducing Rth(j-c) to 1.0 °C/W in TO-220AB and supporting 20 A RMS conduction at Tc = 128 °C.

Key Specifications

Pinout & Package

TO-220AB package with insulated tab (non-conductive mounting surface), 3-terminal configuration: Anode 1 (A1), Anode 2 (A2), Gate (G). Mounting hole centered for mechanical stability; tab electrically isolated per UL E81734 certification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with T2050H-6I and T2050H-6G, the T2050H-6T offers optimal balance of thermal performance (1.0 °C/W), mechanical robustness (through-hole mounting), and regulatory compliance (UL-certified insulated tab), making it ideal for mid-volume industrial motor controls requiring field-serviceable replacement.

Availability

T2050H-6T 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 multi-year production cycles.

Supply support for T2050H-6T 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, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

The H-series snubberless triac product line targets high-reliability AC power control in white goods and power tools, emphasizing thermal efficiency, safety certification, and 3-quadrant commutation robustness.

FAQ

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

The T2050H-6T supports 20 A RMS conduction at Tc = 128 °C in TO-220AB package, as specified in Table 1. Exceeding this temperature requires linear derating per Figure 2; at Tc = 100 °C, maximum IT(RMS) rises to ~23 A. Thermal interface material and heatsink fin design directly impact achievable Tc.

Does T2050H-6T require a heatsink in all applications?

Yes - even at 20 A RMS, junction temperature exceeds safe limits without heatsinking. With Rth(j-c) = 1.0 °C/W and Rth(c-a) ≈ 45 °C/W (no heatsink), power dissipation (~30 W) would raise Tj to >1000 °C. A minimum 10 cm² aluminum heatsink is recommended for 20 A operation at 40 °C ambient.

Can T2050H-6T replace older T2035H-6T devices in existing designs?

Yes - both share identical TO-220AB package, pinout, and voltage rating, but T2050H-6T has higher IGT (50 mA vs. 35 mA) and improved (dl/dt)c (36 A/ms vs. 27 A/ms). Gate drive circuitry must deliver ≥50 mA; no changes needed to layout or thermal design.

Is the insulated tab on T2050H-6T rated for 2500 VRMS continuously or only for dielectric testing?

The 2500 VRMS rating is a continuous working voltage per UL E81734 certification - not just a test value. It reflects guaranteed isolation between the metal tab and internal die under steady-state 50/60 Hz AC, enabling direct mounting to grounded chassis in Class I appliances.