STMicroelectronics T3050H-6T

Overview

T3050H-6T from STMicroelectronics is a 30 A, 600 V Snubberless Triac in TO-220AB package, designed for high-noise industrial AC load control. It delivers 50 mA gate trigger current (IGT), 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 T3050H-6T datasheet, T3050H-6T pinout, T3050H-6T application, or T3050H-6T equivalent, key selection criteria include its 150 °C rated operation, low thermal resistance (Rth(j-c) = 0.8 °C/W), high 3-quadrant commutation capability, and UL certification (E81734) for safety-critical AC switching systems.

Technical Context

This H-series triac uses ST's Snubberless architecture with internal ceramic insulation (2500 VRMS), enabling reliable triggering and commutation across all four quadrants - especially critical for inductive loads like universal motors where phase-controlled turn-off must withstand high di/dt and dv/dt transients. Its specified dV/dt ≥ 1000 V/µs and (di/dt)c ≥ 33 A/ms are guaranteed up to Tj = 150 °C.

The device features dual thermal performance envelopes: IT(RMS) = 30 A at Tc = 121 °C for D²PAK/TO-220AB, and 30 A at Tc = 92 °C for insulated TO-220AB. Junction-to-case thermal resistance of 0.8 °C/W supports compact heatsink design, while Rth(j-a) = 45 °C/W (free air, Scu = 2 cm²) enables cost-effective thermal management in space-constrained appliances.

Key Specifications

Pinout & Package

TO-220AB package with isolated tab (non-insulated variant per ordering code -6T); thermally efficient metal tab for heatsink mounting; 3-pin through-hole configuration with standardized lead spacing (e = 2.54 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB32-600BW and Z0103MN600D, T3050H-6T uniquely combines 30 A current handling, 150 °C operation, UL-certified 2500 VRMS isolation, and snubberless robustness - making it the only viable option for safety-compliant, high-power, high-temperature AC motor control.

Availability

T3050H-6T is available at Aetrix Electronics and suitable for power tool motor control, washing machine drum drives, industrial HVAC damper actuators, and commercial dishwasher heater control requiring stable component supply and long-term lifecycle support.

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

T3050H-6T belongs to ST's H-series Snubberless Triac product line, engineered specifically for high-reliability, high-temperature AC load switching in safety-critical appliances and industrial equipment.

FAQ

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

The T3050H-6T supports 30 A RMS continuous current at Tc = 121 °C for TO-220AB packages, as confirmed in Table 1 of DS6689 Rev 9. Exceeding this temperature requires derating per Figure 2; operation above 121 °C risks thermal runaway due to reduced holding current and increased leakage.

Does T3050H-6T require a heatsink in free-air operation?

Yes - with Rth(j-a) = 45 °C/W (Scu = 2 cm²), dissipating ~2.5 W at 30 A RMS would raise junction temperature by 112.5 °C above ambient. At 25 °C ambient, Tj reaches 137.5 °C, exceeding safe margin; a heatsink reducing Rth(j-c) to ≤0.8 °C/W is mandatory for reliability.

Can T3050H-6T replace a mechanical relay in a 240 VAC, 15 A resistive load?

Yes - its 600 V VDRM provides 2.5× margin over 240 VAC peak (340 V), and 30 A IT(RMS) exceeds the load requirement. Its 2500 VRMS isolation and UL E81734 certification meet relay-replacement safety standards, provided gate drive meets IGT ≤50 mA and layout observes creepage/clearance rules.

Is the TO-220AB tab electrically isolated in the -6T variant?

No - the T3050H-6T uses standard TO-220AB with conductive tab tied to A2. For isolated mounting, the -6I variant (TO-220AB Ins.) must be used, which incorporates internal ceramic insulation between tab and die, rated at 2500 VRMS.