STMicroelectronics T1635H-600IRG

Overview

T1635H-600IRG from STMicroelectronics is a snubberless, insulated TO-220AB triac rated for 16 A RMS on-state current, 600 V blocking voltage, and 35 mA gate trigger current (Q1 quadrant), designed for high-temperature switching of universal motors and inductive loads in cooking appliances, vacuum cleaners, and washing machines.

For engineers reviewing the T1635H-600IRG datasheet, T1635H-600IRG pinout, T1635H-600IRG application, or T1635H-600IRG equivalent, key selection criteria include junction-to-case thermal resistance (2.1 °C/W), commutation robustness at 150 °C, dV/dt immunity (≥300 V/µs at Tj = 150 °C), and insulated package suitability for high-voltage isolation requirements.

Technical Context

This triac operates in all four quadrants with verified Q1 and Q2–Q3 triggering capability, supporting phase-angle control in AC mains-powered inductive loads. Its Snubberless™ architecture eliminates external RC snubbers by guaranteeing ≥7.1 A/ms critical rate of decrease of on-state current without commutation failure across –40 to +150 °C junction temperature range.

Thermal design is enabled by validated junction-to-case resistance of 2.1 °C/W (TO-220AB Insulated) and on-state voltage drop of 0.80 V at 150 °C, enabling direct heatsink sizing for continuous 16 A operation at case temperatures up to 110 °C.

Key Specifications

Pinout & Package

Package: TO-220AB Insulated - Electrically isolated metal tab (2.5 kV RMS isolation rating per IEC 60747-9), 2.3 g mass, 15.9 mm height, 10.4 mm width, 4.6 mm depth; suitable for PCB mounting with insulating washer or clip-on heatsink.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-temperature triac switching applications.

Compared with BTB16-600CW and T1635H-600TRG, the T1635H-600IRG uniquely integrates reinforced insulation into the package, eliminating external isolation components while maintaining full Snubberless™ commutation integrity at 150 °C - critical for space-constrained, high-reliability appliance designs.

Availability

T1635H-600IRG is available at Aetrix Electronics and suitable for electric cooktops, washing machine motor drives, and vacuum cleaner speed controllers requiring stable component supply across extended production lifecycles.

Supply support for T1635H-600IRG 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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The T1635H series belongs to ST's Snubberless™ Power Switching portfolio, engineered specifically for high-temperature, high-noise AC load control in white goods and kitchen appliances where reliability and thermal resilience are mandatory.

FAQ

Is T1635H-600IRG RoHS-compliant and lead-free?

Yes. The T1635H-600IRG is manufactured in ST's ECOPACK®-compliant TO-220AB Insulated package with lead-free second-level interconnect, meeting RoHS Directive 2011/65/EU and JEDEC JESD97 marking requirements. The inner box label confirms Pb-free status and soldering profile limits.

Can T1635H-600IRG replace T1635H-600TRG in existing designs?

Yes, with mechanical adaptation: both share identical die, electrical specs, and thermal characteristics except for insulation. The T1635H-600IRG's insulated tab eliminates the need for mica washers or silicone pads, simplifying assembly but requiring verification of creepage/clearance distances in high-voltage zones.

What gate drive circuit is recommended for reliable Q1 triggering?

A 35 mA, 10–20 µs pulse with <100 ns rise time is sufficient. ST recommends using an MOC3021 or IL420 optocoupler with 33 Ω series gate resistor and 0.1 µF bypass capacitor at the gate-A1 node to suppress noise-induced false triggering in motor-drive applications.

Does T1635H-600IRG support zero-crossing switching?

No - it is a random-phase triac. Zero-crossing operation requires external zero-crossing detection (e.g., using an optocoupler like H11AA1) and timing logic to delay gate pulses until voltage crosses zero; the device itself does not incorporate zero-crossing circuitry.