STMicroelectronics T610H-6T

Overview

T610H-6T from STMicroelectronics is a high-temperature, logic-level sensitive 6 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 control of AC loads in appliance motor drives and industrial heating systems.

For engineers reviewing the T610H-6T datasheet, T610H-6T pinout, T610H-6T application, or T610H-6T equivalent, key selection criteria include its 150 °C thermal rating, low IGT for logic-level drive, dI/dt capability of 50 A/µs at Tj = 150 °C, and optimized on-state characteristics for heatsink reduction in space-constrained AC power control designs.

Technical Context

The T610H-6T implements a bidirectional thyristor structure with three-quadrant gate sensitivity (Quadrants I, II, III), enabling reliable triggering under both polarities of A2 relative to A1. Its logic-level gate design ensures compatibility with 3.3 V/5 V MCU outputs without external amplification.

Thermal performance is defined by Rth(j-c) = 1.8 °C/W and operation up to Tj = 150 °C, supported by enhanced commutation robustness (dI/dt)c ≥ 8.7 A/ms at 0.1 V/µs slew rate. Static blocking capability maintains IDRM ≤ 5 µA at 25 °C and ≤2.7 mA at 150 °C under 600 V stress.

Key Specifications

Pinout & Package

TO-220AB package with isolated mounting tab (A2 connected to case), epoxy body compliant with UL94 V0, and recommended mounting torque of 0.4–0.6 N·m.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TRIAC switching applications.

Compared with BT138-600D and MAC610L, the T610H-6T uniquely combines 6 A RMS rating, 150 °C junction capability, and ≤10 mA IGT in a single TO-220AB device-enabling simplified, high-density AC control without gate buffers or thermal derating compromises.

Availability

T610H-6T is available at Aetrix Electronics and suitable for washing machine motor control, industrial oven heating, smart dishwasher pump actuation, and commercial HVAC fan regulation requiring stable component supply across multi-year production cycles.

Supply support for T610H-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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The T610H-6T belongs to ST's high-temperature logic-level TRIAC product line, engineered specifically for solid-state replacement of electromechanical relays in thermally demanding AC power control applications.

FAQ

What is the maximum allowable case temperature for continuous operation?

The T610H-6T supports continuous operation at case temperature (Tc) up to 138 °C, as specified in Table 2 for IT(RMS) = 6 A. Exceeding this value requires derating per Figure 2, and thermal design must ensure junction temperature remains ≤150 °C under worst-case load and ambient conditions.

Can the T610H-6T be driven directly from a 3.3 V microcontroller GPIO?

Yes - its guaranteed IGT ≤ 10 mA at 25 °C and ≤15 mA at 150 °C allows direct drive from 3.3 V MCU pins using a series resistor (e.g., 220 Ω for ~10 mA). Gate triggering is valid in Quadrants I, II, and III, supporting both polarities of A2 relative to A1.

Is a heatsink mandatory for 6 A RMS operation?

Yes - at 6 A RMS and Tc = 138 °C, the device dissipates ~9 W (based on VTM ≈ 1.5 V and conduction angle). With Rth(j-c) = 1.8 °C/W, a heatsink is required to maintain Tj ≤ 150 °C; Rth(c-a) must be ≤ 5.2 °C/W for free-air convection at Ta = 50 °C.

Does the TO-220AB package provide electrical isolation between A2 and the mounting tab?

No - in the T610H-6T TO-220AB package, A2 (MT2) is internally connected to the metal tab. The tab must be electrically tied to the A2 potential and insulated from other system potentials using non-conductive mounting hardware or insulating pads if referenced to a different voltage rail.