STMicroelectronics T1650H-6I

Overview

T1650H-6I from STMicroelectronics is a 16 A, 600 V insulated TO-220AB triac designed for high-power-density AC mains switching in universal motor loads and inrush current limiting. It delivers 50 mA gate trigger current (IGT), supports 150 °C junction operation, and features 2500 VRMS isolation via internal ceramic pad-enabling direct heatsink mounting without additional insulation in vacuum cleaners and coffee brewers.

For engineers reviewing the T1650H-6I datasheet, T1650H-6I pinout, T1650H-6I application, or T1650H-6I equivalent, key selection criteria include snubberless 3-quadrant commutation capability, dV/dt immunity of 1500 V/µs at 150 °C, thermal resistance Rth(j-c) = 2.1 °C/W, and UL certification (E81734) for safety-critical appliance designs.

Technical Context

This H-series snubberless triac operates across all four quadrants but is optimized for robust 3-quadrant commutation-especially Quadrants I, II, and III-with guaranteed turn-off at up to 150 °C junction temperature. Its low dynamic resistance (23 mΩ) and threshold voltage (0.80 V at 150 °C) minimize conduction losses in continuous-duty motor control.

The device integrates an internal ceramic insulating pad rated for 2500 VRMS, enabling direct metal heatsink attachment while maintaining reinforced isolation. Its critical rate of rise of on-state current (dl/dt) is specified at 100 A/µs with IG = 2×IGT, supporting reliable triggering under fast-rising load currents typical in inverter-fed home appliances.

Key Specifications

Pinout & Package

TO-220AB Insulated package with integral ceramic isolation barrier; case serves as heatsink and electrically isolated terminal (2500 VRMS rating). Mounting screw torque: 0.4–0.6 N·m.

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 T1650H-6T, the T1650H-6I provides certified 2500 VRMS isolation and UL recognition-critical for Class I appliances-while trading 93 % higher junction-to-case thermal resistance for safety compliance, making it optimal where regulatory approval outweighs marginal thermal gain.

Availability

T1650H-6I 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, long-term lifecycle support, and UL-certified isolation.

Supply support for T1650H-6I 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 automotive, industrial, and power discrete solutions with emphasis on reliability, safety, and energy efficiency.

The T1650H-6I belongs to ST's H-series snubberless triac product line, engineered specifically for high-temperature, high-density AC switching in consumer appliances where regulatory compliance and thermal robustness are primary design constraints.

FAQ

What is the maximum allowable case temperature for continuous operation?

The T1650H-6I is rated for continuous operation with case temperature (Tc) up to 113 °C when mounted on an insulated heatsink, as defined in Table 1 of DS5310 Rev 4. Exceeding this limit risks exceeding the 150 °C maximum junction temperature under worst-case conduction and ambient conditions.

Does the insulated TO-220AB package require a thermal pad or insulator when mounted to a metal heatsink?

No-the internal ceramic pad provides 2500 VRMS isolation, so direct metal-to-metal contact between the tab and heatsink is permitted and recommended for optimal thermal performance. No additional insulator or thermal pad is needed unless enhanced thermal interface is desired.

Can T1650H-6I replace T1635H-6I in existing designs?

Yes, with functional trade-offs: T1650H-6I has higher IGT (50 mA vs. 35 mA), higher IH (75 mA vs. 35 mA), and higher dV/dt immunity (1500 V/µs vs. 1000 V/µs), but requires slightly stronger gate drive. Layout and thermal design remain identical due to shared TO-220AB Ins. package.

Is tape-and-reel packaging available for T1650H-6I?

No-T1650H-6I is only offered in tube packaging (50 pcs/tube), per ST's ordering information in DS5310 Rev 4. The D²PAK variant (T1650H-6G) supports tape-and-reel (1000 pcs/reel), but the insulated TO-220AB version does not have a reel option.