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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics T3035H-8G

Name: T3035H-8G
Brand: STMicroelectronics
SKU: T3035H-8G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T3035H-8G

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: T3035H-8G.pdf

Description:: TRIAC ALTERNISTOR 800V 30A D2PAK

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Product details

Overview

T3035H-8G from STMicroelectronics is a 30 A, 800 V symmetrical blocking voltage Triac in D²PAK package, designed for high-noise-immunity AC load switching at up to 150 °C junction temperature. It supports three triggering quadrants, delivers 25 A/µs critical commutation (dl/dt)_c at T_j = 150 °C, and enables compact SMD designs for universal motor control and heater drive in home appliances.

For engineers reviewing the T3035H-8G datasheet, T3035H-8G pinout, T3035H-8G application, or T3035H-8G equivalent, this part is selected for high-reliability AC line control where thermal robustness, snubberless operation, and static dV/dt immunity ≥2000 V/µs at 150 °C are required.

Technical Context

This Triac implements ST's Snubberless high-temperature technology, enabling stable conduction without external snubbers across full operating temperature range (−40 to +150 °C). Its gate trigger current (I_GT) is specified 5–35 mA across all quadrants, with V_GT ≤1.3 V and V_GD ≥0.15 V at 150 °C - ensuring reliable turn-on under noisy conditions.

The device achieves 25 A/ms minimum critical commutation (dl/dt)_c and 2000 V/µs minimum static dV/dt at T_j = 150 °C, supported by low on-state resistance (R_D ≤16 mΩ) and threshold voltage (V_TO ≤0.83 V) at max junction temperature - key for driving inductive loads like universal motors and heaters without false triggering or commutation failure.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	30 A RMS on-state current at T_c = 121 °C - supports continuous heavy AC loads without forced cooling
VDRM/VRRM	800 V repetitive peak off-state voltage - rated for 230 VAC mains with ≥2× safety margin
(dl/dt)_c	≥25 A/ms at T_j = 150 °C - enables snubberless commutation of universal motors and inductive heaters
dV/dt (static)	≥2000 V/µs at T_j = 150 °C - prevents false turn-on in EMI-heavy environments (e.g., appliance motor noise)
R_th(j-c)	0.8 °C/W max junction-to-case thermal resistance - allows direct heatsink mounting for compact thermal design
I_GT	5–35 mA across quadrants I/II/III - ensures robust gate triggering with standard microcontroller GPIO or optocoupler drivers
V_TM	≤1.55 V at 42 A, 25 °C - limits conduction loss and self-heating during peak load cycles

Pinout & Package

Package: D²PAK (TO-263), ECOPACK2-compliant, lead-free, halogen-free molding compound. Tab is electrically connected to MT2 terminal.

Pin/Terminal	Circuit Role	Design Meaning
MT1	Main Terminal 1	Anode-side main current path; referenced to MT2 for bidirectional conduction
MT2	Main Terminal 2	Cathode-side main current path; electrically tied to exposed tab for thermal conduction and grounding
G	Gate	Control input for triggering in all four quadrants; requires ≥5 mA pulse for guaranteed turn-on at 150 °C

Key Features

Feature	Design Value
Snubberless commutation	Guaranteed (dl/dt)_c ≥25 A/ms at 150 °C eliminates need for external RC snubber networks in motor/heater control
High-temperature operation	Rated for continuous operation up to 150 °C junction temperature - enables smaller heatsinks in space-constrained appliances
Three-quadrant triggering	Supports QI, QII, QIII only - reduces gate drive complexity vs. full four-quadrant parts while maintaining noise immunity
Enhanced dV/dt immunity	2000 V/µs minimum at 150 °C - prevents spurious turn-on from fast transients in AC line switching applications
ECOPACK2 compliance	Halogen-free, lead-free, UL94 V0-rated package - meets RoHS and environmental requirements for global appliance markets

Applications

Smart AC Plug Control

Universal Motor Drive

Use Scenario: Solid-state replacement for mechanical relays in Wi-Fi-enabled smart plugs controlling 230 VAC resistive and inductive loads.

IC Role / Device Role / Timing Role: Bidirectional AC power switch triggered by MCU via optocoupler; handles zero-crossing or phase-angle control.

Use Value: Enables silent, bounce-free switching with 30 A RMS rating and 800 V blocking - supports 6.9 kW resistive loads and motor surges without derating.

Use Scenario: Speed and torque control of universal motors in vacuum cleaners, power tools, and blenders.

IC Role / Device Role / Timing Role: Main AC line switch implementing phase-cut dimming; gate driven by isolated PWM controller.

Use Value: Robust (dl/dt)_c ≥25 A/ms and dV/dt ≥2000 V/µs prevent commutation failure during motor brush noise and load transients.

Water Heater Load Switching

Inrush Limiter for Bridge Rectifiers

Use Scenario: On/off control of 2–3 kW heating elements in tankless water heaters and coffee machines.

IC Role / Device Role / Timing Role: High-current AC switch activated by thermostat or microcontroller; operates at elevated ambient temperatures near heat sources.

Use Value: 150 °C max junction temperature and R_th(j-c) = 0.8 °C/W allow direct heatsink mounting - eliminates thermal interface layers and reduces BOM count.

Use Scenario: Inrush current limiting in AC/DC power supplies using bridge rectifiers and bulk capacitors.

IC Role / Device Role / Timing Role: Pre-charge switch bypassed after capacitor charging; triggered with controlled phase angle to limit surge.

Use Value: 283 A non-repetitive surge rating (tp = 16.7 ms) safely absorbs capacitor charging spikes without degradation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB36-800BW	36 A RMS, 800 V, TO-220AB package; lower dV/dt (1000 V/µs) and no 150 °C rating	Requires larger heatsink and external snubber for universal motor loads at high ambient	Select when higher RMS current is needed but thermal environment is <125 °C and board space permits through-hole mounting
T3050H-8G	30 A, 800 V, same D²PAK package; higher I_GT (50 mA max) and lower (dl/dt)_c (20 A/ms)	Less suitable for noisy motor environments; gate drive must deliver higher current	Select when cost optimization is prioritized over maximum noise immunity and commutation margin

Compared with BTB36-800BW and T3050H-8G, the T3035H-8G uniquely combines 30 A rating, D²PAK SMD compatibility, 150 °C operation, and industry-leading 2000 V/µs dV/dt - making it optimal for compact, thermally demanding, and EMI-prone AC control in modern appliances.

Availability

T3035H-8G is available at Aetrix Electronics and suitable for smart plug control, universal motor drive, water heater switching, and inrush limiting requiring stable component supply and long-term industrial availability.

Supply support for T3035H-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, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer applications.

The T3035H-8G belongs to ST's STPOWER Triac family, engineered specifically for high-reliability, snubberless AC load control in space- and thermally-constrained home appliances and industrial equipment.

FAQ

Is the T3035H-8G compatible with standard D²PAK footprints?

Yes. The T3035H-8G uses the standard D²PAK (TO-263) outline per DS12705 Figure 16, with recommended copper pad dimensions of 10.30 mm × 16.90 mm and 35 µm copper thickness on FR4. Thermal performance is optimized when the exposed tab (MT2) is soldered directly to a large copper pour or heatsink.

What gate drive circuitry is recommended for reliable triggering?

A 12 V, 35 mA capable gate driver is sufficient - such as an MOC302x optocoupler with 330 Ω series resistor. For microcontroller GPIO direct drive, use a 5 V logic-level buffer (e.g., ULN2003) to ensure ≥5 mA peak current at 150 °C, as I_GT increases with junction temperature.

Does the T3035H-8G require a heatsink in all applications?

Heatsink requirement depends on RMS current and ambient conditions. At 30 A RMS and T_c = 121 °C, a heatsink is mandatory. For ≤10 A RMS in free air, thermal simulation shows acceptable junction temperature with only PCB copper area (≥25 cm², 2 oz Cu). Refer to Figure 2 and Figure 6 in DS12705 for case temperature derating curves.

How does the T3035H-8G perform in phase-angle control versus zero-crossing switching?

It supports both modes. Phase-angle control leverages its high dV/dt immunity (≥2000 V/µs) to avoid false triggering during rapid voltage rise. Zero-crossing operation benefits from low V_TO (≤0.83 V) and R_D (≤16 mΩ), minimizing conduction loss and thermal stress during extended on-states.

T3035H-8G Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Snubberless™

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tube

Product Status:: Active

Triac Type:: Alternistor - Snubberless

Voltage - Off State:: 800 V

Current - On State (It (RMS)) (Max):: 30 A

Voltage - Gate Trigger (Vgt) (Max):: 1.3 V

Current - Non Rep. Surge 50, 60Hz (Itsm):: 283A, 270A

Current - Gate Trigger (Igt) (Max):: 35 mA

Current - Hold (Ih) (Max):: 60 mA

Configuration:: Single

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

T3035H-8G FAQ

1.How can I place an order for T3035H-8G through Aetrix?

Please submit a Request for Quotation (RFQ) for T3035H-8G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for T3035H-8G reliable?

The price and inventory of T3035H-8G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T3035H-8G is usually 5 days.

3.What payment methods are accepted for T3035H-8G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T3035H-8G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T3035H-8G?

T3035H-8G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T3035H-8G order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for T3035H-8G?

For technical support, including T3035H-8G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T3035H-8G requirements.

6.How does Aetrix verify that T3035H-8G is sourced from the original manufacturer or authorized distributors?

All T3035H-8G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that T3035H-8G meets industry standards.

7.What is the process for return or replacement of T3035H-8G?

All T3035H-8G units undergo pre-shipment inspection (PSI). If there is an issue with T3035H-8G, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The T3035H-8G part is unused and in its original packaging.

Return procedure for T3035H-8G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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