STMicroelectronics T1635H-6G-TR

Overview

T1635H-6G-TR from STMicroelectronics is a 16 A, 600 V snubberless triac in D²PAK surface-mount package, designed for mains AC switching in universal motor control and inrush current limiting. It delivers 35 mA gate trigger current (IGT), supports 150 °C junction operation, and features 1000 V/µs dV/dt immunity at 150 °C - enabling robust commutation in vacuum cleaners and coffee brewers.

For engineers reviewing the T1635H-6G-TR datasheet, T1635H-6G-TR pinout, T1635H-6G-TR application, or T1635H-6G-TR equivalent, this part is selected for high-density SMD designs requiring reliable 3-quadrant switching, low thermal resistance (Rth(j-c) = 1.15 °C/W), and UL-certified insulation performance without external snubbers.

Technical Context

This H-series triac uses a planar passivated silicon structure optimized for high commutation robustness across all three quadrants, with guaranteed turn-off capability up to 150 °C junction temperature. Its internal ceramic pad is absent in the D²PAK variant (unlike TO-220AB Ins.), but thermal performance is enhanced via clip bonding for reduced Rth(j-c).

It operates without external snubbers due to intrinsic dV/dt immunity (min. 1000 V/µs at Tj = 150 °C) and high critical rate of decrease of main current (dl/dt)c ≥ 21 A/ms at 150 °C - key for inductive load switching in motor drives and appliance power stages.

Key Specifications

Pinout & Package

D²PAK (TO-263) surface-mount package with isolated tab; thermally enhanced clip-bonded die construction; 1.5 g mass; RoHS-compliant, halogen-free molding compound; ECOPACK2 certified.

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-TR uniquely combines UL certification, D²PAK automation readiness, and lowest Rth(j-c) among 16 A triacs - making it optimal for next-gen compact, certified, and high-volume appliance designs.

Availability

T1635H-6G-TR is available at Aetrix Electronics and suitable for vacuum cleaner motor control, coffee brewer heating regulation, and inverter-based inrush limiting requiring stable component supply and full tape-and-reel logistics support.

Supply support for T1635H-6G-TR 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, delivering intelligent power, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.

This triac belongs to ST's H-series snubberless AC switches product line, engineered specifically for high-reliability, high-power-density mains control in white goods and home appliances where thermal efficiency and safety certification are critical.

FAQ

What is the maximum junction temperature rating for T1635H-6G-TR?

The absolute maximum operating junction temperature is +150 °C, verified per DS5310 Rev 4 Table 1. This rating enables sustained 16 A RMS conduction under high ambient conditions when mounted on a PCB with ≥2 cm² copper area, and is essential for thermal derating in enclosed appliance housings.

Does T1635H-6G-TR require an external snubber circuit?

No. Its minimum dV/dt immunity of 1000 V/µs at 150 °C (Table 2) and high (dl/dt)c of 21 A/ms eliminate the need for external snubbers in typical universal motor and resistive load applications - confirmed in ST's application note AN4922 for snubberless triac design.

What is the gate trigger current specification and how is it tested?

Maximum IGT is 35 mA, measured at VD = 12 V and RL = 33 Ω across all three quadrants (Table 2). Testing follows IEC 61000-4-5 surge immunity guidelines, with gate pulses synchronized to ensure consistent triggering under worst-case line-phase conditions.

How does the D²PAK package compare thermally to TO-220AB variants?

The D²PAK version achieves Rth(j-c) = 1.15 °C/W (Table 4), matching the non-insulated TO-220AB variant and outperforming the insulated TO-220AB (2.1 °C/W). Its clip-bonded construction provides superior thermal transfer versus wire-bonded alternatives, enabling higher power density in automated SMD assemblies.