STMicroelectronics T1050H-6I

Overview

T1050H-6I from STMicroelectronics is a high-temperature, snubberless 10 A triac in insulated TO-220AB package, rated for 600 V repetitive peak off-state voltage (VDRM/VRRM), 50 mA maximum gate trigger current (IGT), and 150 °C maximum junction temperature. It delivers robust 3-quadrant commutation and low thermal resistance (Rth(j-c) = 3.4 °C/W), enabling reliable AC mains switching in compact motor drives.

For engineers reviewing the T1050H-6I datasheet, T1050H-6I pinout, T1050H-6I application, or T1050H-6I equivalent, key selection criteria include its 1000 V/µs minimum dV/dt at 150 °C, 13 A/ms minimum critical commutating di/dt, 1.5 V max on-state voltage at 14 A, and UL certification (E81734) with 2500 V_rms isolation.

Technical Context

This triac operates as a bidirectional AC switch with gate-controlled turn-on in all three quadrants (I, II, III), supporting phase-angle and zero-crossing control topologies. Its internal ceramic pad provides reinforced insulation between die and heatsink, enabling safe operation without external isolation barriers.

The device is optimized for high-temperature reliability: it maintains ≥13 A/ms commutating di/dt and ≥1000 V/µs dV/dt even at Tj = 150 °C, while delivering low on-state losses (V_t0 ≤ 0.80 V, R_d ≤ 34 mΩ) to reduce thermal stress in universal motor loads.

Key Specifications

Pinout & Package

Package: TO-220AB Insulated - Plastic body with electrically isolated metal tab (ceramic pad), UL-certified, RoHS-compliant, torque specification 0.4–0.6 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB12-600BW and Q6012LH5, the T1050H-6I uniquely combines UL certification, 2500 V_rms isolation, and validated 150 °C operation-making it optimal for safety-critical, space-constrained, high-temperature appliance motor controls where regulatory compliance and thermal headroom are non-negotiable.

Availability

T1050H-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, long-term lifecycle support, and traceable sourcing for Class I appliance manufacturing.

Supply support for T1050H-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, mixed-signal, power, and MCU products for industrial, automotive, and consumer markets.

The T10xxH series belongs to ST's high-temperature snubberless triac product line, engineered specifically for compact, high-efficiency AC motor control in household appliances operating continuously near thermal limits.

FAQ

What is the maximum allowable case temperature for continuous operation?

The T1050H-6I supports continuous 10 A RMS operation at Tc = 125 °C in the insulated TO-220AB package, as specified in Table 2. Derating begins above this point; at 135 °C case temperature, maximum IT(RMS) drops to 8.5 A. Thermal design must maintain case temperature ≤125 °C under worst-case ambient and airflow conditions.

Does the 2500 V_rms isolation rating apply to DC or AC voltage?

The 2500 V_rms isolation rating is an AC withstand voltage per UL E81734, verified at 50/60 Hz for 1 minute. It applies to the voltage difference between the die (A1/A2/G) and the insulated metal tab (heatsink interface). This rating does not imply DC isolation capability beyond standard dielectric strength limits.

Can T1050H-6I replace T1035H-6I in existing designs?

Yes, the T1050H-6I is a direct replacement for T1035H-6I in all applications, with identical pinout, package, and voltage ratings. The only difference is higher gate trigger current (50 mA vs. 35 mA), which may require verification that the existing gate driver can source sufficient current-especially at elevated temperatures where IGT increases.

Is a heatsink mandatory for 10 A operation?

Yes-a heatsink is mandatory. At 10 A RMS and 125 °C case temperature, power dissipation reaches ~3.5 W. With Rth(j-c) = 3.4 °C/W, junction temperature would exceed 150 °C without additional heatsinking. A minimum 10 cm² copper area (FR4, 35 µm) or small extruded aluminum heatsink is required to maintain safe thermal margins.