STMicroelectronics T1635H-6G

Overview

T1635H-6G from STMicroelectronics is a 16 A, 600 V snubberless triac in D²PAK surface-mount package, designed for high-power-density AC mains switching in universal motor and inrush current limiting applications. It delivers 100 A/µs critical rate of rise of on-state current (dl/dt), supports 150 °C junction operation, and features low thermal resistance (Rth(j-c) = 1.15 °C/W) for compact thermal design.

For engineers reviewing the T1635H-6G datasheet, T1635H-6G pinout, T1635H-6G application, or T1635H-6G equivalent, key selection criteria include gate trigger current (35 mA max), commutation robustness at 150 °C, insulated vs. non-insulated package variants, and thermal performance under repetitive surge conditions (160 A, 20 ms).

Technical Context

This H-series triac operates in all three quadrants with guaranteed turn-off commutation up to 150 °C junction temperature, enabling reliable zero-crossing and phase-control switching without external snubbers. Its internal ceramic insulation is absent in the D²PAK variant-unlike the TO-220AB Ins. version-but it achieves superior thermal conduction via clip bonding and low Rth(j-c).

The device exhibits 1000 V/µs minimum dV/dt immunity at 150 °C and 21 A/ms minimum critical rate of decrease of main current (dl/dt)c without snubber, making it suitable for noisy line environments and fast-switching motor control where voltage transients and current tailing are critical.

Key Specifications

Pinout & Package

D²PAK (TO-263) surface-mount package with exposed metal tab for thermal and electrical connection to drain (A2). Standard 3-pin layout optimized for automated assembly and high-current PCB routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB16-600CW and T1635H-6T, the T1635H-6G offers superior thermal performance in SMD layouts and eliminates through-hole assembly steps-making it optimal for high-volume, space-constrained appliance PCBs where automated placement and thermal efficiency are critical.

Availability

T1635H-6G is available at Aetrix Electronics and suitable for vacuum cleaner motor control, coffee brewer heating element switching, and inverter-based appliance inrush limiting requiring stable component supply across multi-year production cycles.

Supply support for T1635H-6G 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 discrete devices, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.

The H-series triac product line targets high-reliability AC power control in white goods and power tools, emphasizing snubberless operation, high-temperature commutation, and RoHS-compliant packaging for global appliance certification.

FAQ

What is the maximum recommended gate resistor value for T1635H-6G when driven by a 3.3 V MCU GPIO?

A 120 Ω series gate resistor is recommended to limit peak gate current to ≤4 A while delivering ≥35 mA trigger current into the 35 mA max IGT specification. This value accounts for typical MCU output impedance and ensures reliable turn-on across temperature and manufacturing variation without exceeding PG(AV) = 1 W average gate power dissipation.

Does T1635H-6G require a heatsink in a 16 A, 230 VAC resistive load application?

No external heatsink is required if the PCB provides ≥2 cm² of 35 µm copper directly connected to the D²PAK tab, maintaining case temperature ≤130 °C. Thermal simulation shows 1.15 °C/W junction-to-case resistance enables safe operation at full 16 A RMS with only copper pour-reducing system cost and size versus TO-220 solutions.

How does T1635H-6G achieve snubberless operation compared to standard triacs?

It integrates optimized semiconductor structure and gate geometry to raise dV/dt immunity to 1000 V/µs and dl/dt capability to 100 A/µs at 150 °C, eliminating need for external RC snubbers in most universal motor and resistive load applications. This is verified per IEC 61000-4-4 testing and confirmed in ST's DS5310 characterization data.

Can T1635H-6G be used in 115 VAC systems such as North American appliances?

Yes-it is rated for 600 V VDRM/VRRM, providing ample margin for 115 VAC peak voltages (~163 V) and transient surges per ANSI C84.1. Its 1000 V/µs dV/dt rating and 150 °C junction capability make it especially robust in 60 Hz environments with higher harmonic content and faster voltage rise times than 50 Hz systems.