STMicroelectronics T2535T-8G-TR

Overview

T2535T-8G from STMicroelectronics is a 25 A, 800 V RMS snubberless Triac in D²PAK surface-mount package, designed for phase-angle and on/off AC load control in home appliances. It features 35 mA gate trigger current, 150 °C maximum junction temperature, 900 V non-repetitive surge voltage, and three-quadrant triggering with high dV/dt immunity up to 1500 V/µs at 125 °C - enabling robust motor and heater control in water heaters, ovens, and power tools.

For engineers reviewing the T2535T-8G datasheet, T2535T-8G pinout, T2535T-8G application, or T2535T-8G equivalent, key selection criteria include verified commutation robustness (≥28 A/ms at 125 °C), gate sensitivity (IGT ≤ 35 mA), thermal resistance (Rth(j–c) ≤ 1 °C/W), and ECOPACK2-compliant SMD packaging for automated assembly.

Technical Context

This Triac implements ST's Snubberless technology to eliminate external snubber networks in demanding AC switching applications. Its three-quadrant triggering (I, II, III) supports flexible gate drive design, while static dV/dt immunity ≥1000 V/µs at 150 °C ensures noise resilience in electrically noisy environments like motor drives and heating systems.

The device operates across –40 to +150 °C junction temperature range and delivers stable on-state performance with VTM ≤ 1.5 V at 35 A and dynamic resistance RD ≤ 17 mΩ at 150 °C. Its robust (dI/dt)c rating (≥18 A/ms at 150 °C) enables reliable turn-off under high-current inductive loads without commutation failure.

Key Specifications

Pinout & Package

D²PAK (TO-263) surface-mount package with isolated tab, ECOPACK2-compliant, lead-free terminations, halogen-free molding compound (UL94 V0), and 1.6 g unit weight. Designed for automatic placement and reflow soldering with recommended footprint per DS13451 Figure 13.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB24-800CW and T2535H-8G, the T2535T-8G uniquely balances SMD manufacturability, 150 °C operation, and snubberless commutation - making it optimal for cost-sensitive, space-constrained home appliance PCBs requiring >50,000-cycle reliability.

Availability

T2535T-8G is available at Aetrix Electronics and suitable for water heater control, oven heating element management, and universal motor speed regulation requiring stable component supply and full tape-and-reel logistics support.

Supply support for T2535T-8G 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, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The T-series Triac product line targets high-reliability AC power control in white goods and power tools, emphasizing snubberless operation, extended temperature range, and SMD compatibility for next-generation appliance platforms.

FAQ

What is the maximum allowable case temperature for continuous 25 A RMS operation?

The datasheet specifies IT(RMS) = 25 A at Tc = 121 °C (Figure 2). Operation above this requires derating - e.g., 20 A at Tc = 135 °C. Thermal design must ensure case temperature remains ≤121 °C under worst-case ambient and airflow conditions using the stated Rth(j–c) ≤ 1 °C/W.

Can T2535T-8G replace a traditional 4Q Triac in existing designs?

Yes, but only if the gate driver supports three-quadrant triggering (I, II, III). Unlike 4Q Triacs, T2535T-8G does not conduct in quadrant IV - verify that existing control logic never applies negative gate voltage relative to A1 during A2-positive half-cycles.

Is a heatsink required for 25 A operation in free air?

Yes. At Ta = 50 °C with no heatsink (Rth(j–a) ≈ 45 °C/W), power dissipation would exceed safe limits. Figure 3 shows IT(RMS) drops to ~2.5 A in free air at 50 °C. A heatsink reducing Rth(j–c) + Rth(c–a) to ≤ 2.5 °C/W is required to sustain 25 A at elevated ambient temperatures.

Does the D²PAK package support reflow soldering per JEDEC J-STD-020?

Yes. The D²PAK package is qualified for standard Pb-free reflow profiles (peak 260 °C for 10 s, per Table 1). The maximum lead temperature rating is 260 °C, and the package complies with IPC/JEDEC J-STD-020D moisture sensitivity level 3 (MSL3) when sealed per manufacturer guidelines.