STMicroelectronics T810H-6T

Overview

T810H-6T from STMicroelectronics is a high-temperature, logic-level sensitive 8 A TRIAC in TO-220AB package, rated for 600 V repetitive peak off-state voltage (VDRM/VRRM), with gate trigger current ≤10 mA and maximum junction temperature of 150 °C. It enables direct microcontroller port driving in AC load control for appliances and industrial systems.

For engineers reviewing the T810H-6T datasheet, T810H-6T pinout, T810H-6T application, or T810H-6T equivalent, key selection criteria include its 150 °C thermal rating, low IGT for logic-level drive, dV/dt immunity up to 75 V/µs at Tj = 150 °C, and robust commutation performance under high-temperature switching conditions.

Technical Context

The T810H-6T is a bidirectional thyristor designed for full-wave AC phase control, operating in all four quadrants (I–III) with symmetric triggering characteristics. Its logic-level gate sensitivity (IGT ≤10 mA) eliminates need for external gate drivers when interfaced with standard 3.3 V/5 V MCU I/O ports.

It features enhanced thermal robustness with Rth(j-c) = 1.60 °C/W and supports reliable turn-off commutation at Tj = 150 °C. Critical design parameters include (dI/dt)c = 11.4 A/ms (logic-level, 0.1 V/µs) and static dV/dt immunity ≥75 V/µs at maximum junction temperature.

Key Specifications

Pinout & Package

TO-220AB package with isolated mounting tab; three terminals: A1 (MT1), A2 (MT2), and G (Gate). Standard through-hole mounting with recommended torque 0.4–0.6 N·m.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TRIAC-based AC load control applications.

Compared with BT139-600E and MAC8QD60, the T810H-6T uniquely delivers verified 150 °C junction operation with logic-level gate drive and 75 V/µs dV/dt immunity-enabling compact, high-reliability AC control in thermally demanding appliance and industrial enclosures without added buffering or derating.

Availability

T810H-6T is available at Aetrix Electronics and suitable for washing machine motor control, HVAC fan regulation, commercial oven heating, and programmable power outlet modules requiring stable component supply and long-term industrial lifecycle support.

Supply support for T810H-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, specializing in power devices, microcontrollers, sensors, and analog ICs for industrial, automotive, and consumer markets.

The T810H series belongs to ST's high-temperature logic-level TRIAC product line, engineered specifically for solid-state replacement of electromechanical relays in thermally constrained AC control applications across white goods and factory automation.

FAQ

What is the maximum allowable case temperature for continuous operation of the T810H-6T?

The T810H-6T supports continuous operation with case temperature (Tc) up to 135 °C while delivering its full 8 A RMS rated current. This is specified in Table 2 of the datasheet under "On-state rms current" with Tc = 135 °C. Exceeding this requires derating per Figure 2, which plots IT(RMS) versus Tc.

Can the T810H-6T be driven directly by a 3.3 V microcontroller GPIO without a gate resistor?

No-while the T810H-6T has logic-level sensitivity (IGT ≤10 mA), a series gate resistor is mandatory to limit peak gate current and prevent damage. ST recommends selecting RG to ensure IG remains below 4 A peak (per Table 2 IGM rating) and to shape the gate pulse for reliable triggering across temperature and load conditions.

Does the T810H-6T require snubber circuits in typical 230 VAC resistive load applications?

Snubbers are not required for purely resistive loads at 230 VAC, as dV/dt stress is low during zero-crossing switching. However, ST recommends evaluating snubber use for inductive loads (e.g., motors) or when fast dV/dt transients exceed 75 V/µs, especially at elevated junction temperatures where dV/dt immunity decreases (see Figure 12).

Is the TO-220AB package of the T810H-6T electrically insulated?

No-the TO-220AB package has an electrically conductive metal tab (A2/MT2) that is internally connected to the main terminal. Electrical isolation must be achieved using insulating shoulder washers and isolated mounting hardware. The datasheet specifies "isolated mounting tab" only in mechanical context-not electrical isolation.