STMicroelectronics T1635-600G-TR

Overview

T1635-600G-TR from STMicroelectronics is a 16 A, 600 V Snubberless™ triac in D²PAK (TO-263) surface-mount package, designed for high-commutation AC mains switching in inductive loads. It features 35 mA gate trigger current (IGT), 1000 V/µs critical dV/dt (Tj = 125 °C), and insulated thermal performance with Rth(j-c) = 1.2 °C/W - enabling use in compact motor speed controllers and static relays without external snubbers.

For engineers reviewing the T1635-600G-TR datasheet, T1635-600G-TR pinout, T1635-600G-TR application, or T1635-600G-TR equivalent, key selection criteria include its 3-quadrant Snubberless™ operation, 2500 VRMS isolation rating (via internal ceramic pad), low IGT sensitivity, and D²PAK thermal efficiency for conduction-cooled industrial PCB layouts.

Technical Context

This triac operates in three quadrants (I, II, III) with no gate triggering required in Quadrant IV, reducing false turn-on risk in noisy environments. Its Snubberless™ architecture eliminates need for RC snubber networks when driving inductive loads like universal motors or solenoids, validated by 8.5 A/ms critical di/dt and 1000 V/µs dV/dt immunity at 125 °C junction temperature.

Thermally, it uses clip-bonding and an internal insulated ceramic pad to achieve 1.2 °C/W junction-to-case resistance in D²PAK, supporting 16 A RMS current at Tc = 100 °C. The device complies with UL 1557 (E81734) and RoHS 2002/95/EC, with rated insulation voltage of 2500 VRMS between tab and die.

Key Specifications

Pinout & Package

D²PAK (TO-263) package with exposed copper thermal pad on underside; mechanical dimensions per ST DS2114 Rev 11 Table 7 (A = 4.3–4.6 mm, E = 10.0–10.28 mm, H = 15–15.85 mm); recommended footprint per Figure 15.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTA16-600CW, T1635-600G-TR offers superior thermal efficiency and automated assembly compatibility; versus T1650-600G-TR, it lowers gate drive burden while maintaining identical Snubberless™ inductive load capability.

Availability

T1635-600G-TR is available at Aetrix Electronics and suitable for induction motor speed controllers, static relay modules, light dimmers, and heating regulation systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for T1635-600G-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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

This device belongs to ST's Snubberless™ triac product line, engineered specifically for reliable, snubber-free AC power control in inductive and resistive mains-connected applications - emphasizing safety, thermal efficiency, and EMI resilience.

FAQ

What is the maximum allowable case temperature for continuous 16 A RMS operation?

The T1635-600G-TR supports 16 A RMS continuous current at Tc = 100 °C, as specified in Table 1 of DS2114 Rev 11. Derating begins above this temperature: at Tc = 110 °C, IT(RMS) drops to ~14.5 A. Thermal design must ensure the D²PAK tab maintains ≤100 °C under worst-case ambient and airflow conditions.

Does the insulated tab require electrical isolation from the PCB ground plane?

Yes - the D²PAK tab is internally connected to A2 and rated for 2500 VRMS isolation. When mounted on a PCB, the copper thermal pad must be isolated from all other conductors (including ground planes) using non-conductive thermal interface material and clearance ≥3.2 mm per IEC 61000-4-5. ST recommends using insulating sil-pad or ceramic washers.

Can T1635-600G-TR replace a standard BTA16-600B in an existing TO-220 design?

No - T1635-600G-TR uses D²PAK surface-mount packaging and has different pinout, thermal mounting, and soldering requirements. Direct replacement would require PCB redesign, new stencil, and requalification. For drop-in upgrades, consider BTA16-600CW (same TO-220AB Ins. package, same 35 mA IGT).

What gate drive circuit is recommended for microcontroller interfacing?

A series resistor of 220 Ω between MCU GPIO and gate limits peak IGT to ~35 mA at 5 V drive; add a 100 nF capacitor from G to A1 to suppress noise-induced false triggering. For zero-crossing phase control, pair with an optocoupler like MOC3023 (6 mA IFT) and RC timing network to generate precise gate pulses.