STMicroelectronics T2650-6PF

Overview

T2650-6PF from STMicroelectronics is a snubberless 26 A RMS, 600 V blocking voltage triac in TO-3PF package, rated for 260 A non-repetitive surge current and 1000 V/µs dV/dt immunity. It features insulated tab (2500 V_rms), UL-1557 recognition (File Ref. 81734), and ECOPACK2 compliance. Designed for industrial AC switching up to 3 kW on 120 V AC mains with proper heatsinking.

For engineers reviewing the T2650-6PF datasheet, T2650-6PF pinout, T2650-6PF application, or T2650-6PF equivalent, key selection criteria include snubberless commutation capability (22 A/ms critical di/dt), gate trigger current (50 mA max), thermal resistance (1.25 °C/W typ. junction-to-case), and UL-rated insulation - all critical for static relay, motor starting, and phase-control designs.

Technical Context

The T2650-6PF operates as a bidirectional AC switch with three-quadrant gate triggering (I, II, III), enabling robust turn-on under high dv/dt and di/dt stress without external snubbers. Its 1000 V/µs static dv/dt immunity and 22 A/ms critical rate of current decrease (dI/dt)_c ensure reliable commutation in noisy industrial environments.

Thermally, it delivers 26 A RMS conduction at T_c = 78 °C with R_th(j-c) = 1.25 °C/W (typ.), supporting high-power AC loads when mounted on a properly dimensioned heatsink. The insulated TO-3PF tab provides 2500 V_rms isolation between case and main terminals, meeting safety requirements for grounded-chassis applications.

Key Specifications

Pinout & Package

Package: TO-3PF - metal-can power package with insulated tab, UL94 V0 epoxy, lead-free and halogen-free (ECOPACK2). Tab is electrically isolated from main terminals and rated for 2500 V_rms.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB26-600CW and T2650-600G, the T2650-6PF uniquely balances compact TO-3PF form factor, certified 2500 V_rms tab isolation, and snubberless commutation - making it optimal for space-constrained industrial controls requiring safety-certified, maintenance-free AC switching.

Availability

T2650-6PF is available at Aetrix Electronics and suitable for static relays, heating regulation systems, and induction motor starting circuits requiring stable component supply, long lifecycle support, and UL-recognized safety compliance.

Supply support for T2650-6PF 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 specializing in power management, analog, MCU, and sensor technologies, with manufacturing and R&D operations across Europe, Asia, and the Americas.

The T2650-6PF belongs to ST's high-reliability snubberless triac product line, engineered specifically for industrial AC power control applications demanding high surge immunity, thermal stability, and safety-certified isolation.

FAQ

What is the maximum continuous load the T2650-6PF can switch at 230 V AC?

At 230 V AC, the T2650-6PF supports up to ~5.5 kW continuous load (26 A × 230 V), provided the case temperature is maintained ≤78 °C via appropriate heatsinking. Derating is required above this temperature per Figure 2 in DS13555; actual power depends on ambient conditions and thermal interface quality.

Does the insulated tab require thermal compound when mounted to a heatsink?

Yes - thermal compound (e.g., silicone-based grease or phase-change pad) is required between the insulated tab and heatsink to minimize thermal resistance. The TO-3PF tab's 2500 V_rms rating remains valid with standard dielectric thermal interface materials; no additional electrical insulation is needed beyond the tab's built-in isolation.

Can the T2650-6PF be triggered in all four quadrants?

No - the T2650-6PF is specified for three-quadrant triggering (Quadrants I, II, and III only). Quadrant IV triggering is not guaranteed per datasheet Table 2, and gate drive must respect the polarity constraints defined by A1–A2 reference to avoid unreliable turn-on or increased IGT variation.

Is the T2650-6PF compliant with RoHS and REACH regulations?

Yes - the T2650-6PF is ECOPACK2-compliant, meaning it meets RoHS Directive 2011/65/EU (Pb-free, Cd < 100 ppm, etc.) and REACH SVHC thresholds. Halogen content is also restricted (<900 ppm Cl + Br), and material declarations are available through ST's product portal under ECOPACK documentation.