STMicroelectronics T2535-800G

Overview

T2535-800G from STMicroelectronics is a 12 A, 600 V Snubberless™ Triac in D2PAK package, designed for high-temperature (150 °C) AC mains switching in universal motor loads. It features 35 mA max gate trigger current (IGT), 1000 V/µs min dV/dt at 150 °C, and 50 A/µs critical dI/dt rating - enabling robust commutation in vacuum cleaner and washing machine drum motor drives without external snubbers.

For engineers reviewing the T2535-800G datasheet, T2535-800G pinout, T2535-800G application, or T2535-800G equivalent, key selection criteria include junction temperature derating to 150 °C, insulated thermal performance (Rth(j-c) = 1.4 °C/W), 3-quadrant commutation capability, and RoHS-compliant D2PAK packaging with UL certification (E81734).

Technical Context

This Triac operates as a bidirectional AC power switch with gate-controlled turn-on in all four quadrants, optimized for high-reliability, high-power-density motor control where thermal management is constrained. Its internal ceramic pad provides 2500 V_rms isolation, and its Snubberless™ architecture eliminates need for external RC snubber networks in typical 50/60 Hz mains applications.

The device delivers stable triggering across full junction temperature range (–40 to +150 °C), with IGT variation ≤2× over temperature and guaranteed hold current (IH) of 35 mA at 25 °C. Critical commutation parameters - including (dI/dt)_c ≥16 A/ms and dV/dt ≥1000 V/µs at Tj = 150 °C - ensure reliable turn-off under high dv/dt transients common in inductive motor loads.

Key Specifications

Pinout & Package

D2PAK (TO-263) surface-mount package with isolated copper tab; footprint per Figure 14 (ST Doc ID 13574 Rev 2); recommended torque 0.4–0.6 N·m for heatsink mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB12-600CW and T1235H-6I, T2535-800G uniquely combines D2PAK SMT compatibility, lowest Rth(j-c), and Snubberless™ operation - making it optimal for thermally constrained, high-volume appliance motor controls requiring minimal external components and UL compliance.

Availability

T2535-800G is available at Aetrix Electronics and suitable for vacuum cleaner motor control, washing machine drum drive, and industrial fan speed regulation requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for T2535-800G 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

T2535-800G belongs to ST's Snubberless™ Triac product line, engineered specifically for high-efficiency, high-reliability AC power control in thermally demanding white-goods and power-tool applications.

FAQ

What is the maximum allowable case temperature for continuous operation?

The T2535-800G is rated for continuous operation at Tc = 130 °C in D2PAK package, as specified in Table 2 (Absolute Maximum Ratings). Derating is required above this temperature; at Tc = 130 °C, IT(RMS) remains 12 A. Exceeding 130 °C risks irreversible thermal runaway due to positive temperature coefficient of on-state voltage.

Does T2535-800G require a heatsink in typical vacuum cleaner applications?

Yes - a heatsink is mandatory. With Rth(j-c) = 1.4 °C/W and typical conduction losses of ~1.8 W at 12 A RMS, junction temperature rise exceeds safe limits without thermal management. A minimum 15 cm² aluminum heatsink (Rth(c-a) ≈ 25 °C/W) is required to maintain Tj ≤ 150 °C at ambient 60 °C.

Can T2535-800G replace T1235H-6G in existing designs?

No - T2535-800G is not a direct replacement. While both share identical electrical specs and die, T2535-800G uses D2PAK packaging with different thermal interface geometry and solder-reflow profile. Mechanical redesign and thermal validation are required; PCB footprint, heatsink mounting, and reflow temperature curve must be updated per ST's D2PAK recommendations.

Is gate resistor selection critical for reliable triggering?

Yes - a 100 Ω series gate resistor is recommended to limit peak IGM (4 A) and suppress ringing. Lower values risk exceeding PG(AV) = 1 W under repeated pulsing; higher values delay turn-on and increase susceptibility to dV/dt-induced false triggering. Resistor power rating must exceed 0.5 W for 100 µs pulses at 1 kHz repetition.