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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics T3035H-8G-TR

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

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Part No.:: T3035H-8G-TR

Manufacturer:: STMicroelectronics

Category:: TRIACs

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

Datasheet:: T3035H-8G-TR.pdf

Description:: TRIAC ALTERNISTOR 800V 30A D2PAK

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Product details

Overview

T3035H-8G-TR from STMicroelectronics is a 30 A, 800 V RMS-rated snubberless triac in D²PAK package, designed for high-noise-immunity AC load switching at up to 150 °C junction temperature. It supports three-quadrant triggering and delivers robust dynamic commutation (dl/dt)_c ≥ 25 A/ms and static dV/dt ≥ 2000 V/µs at T_j = 150 °C, enabling reliable control of universal motors, heaters, and inductive loads in home appliances.

For engineers reviewing the T3035H-8G-TR datasheet, T3035H-8G-TR pinout, T3035H-8G-TR application, or T3035H-8G-TR equivalent, key selection criteria include verified 800 V blocking voltage, 35 mA gate trigger current, 0.83 V threshold voltage at 150 °C, 16 mΩ dynamic resistance, and thermal resistance R_th(j–c) ≤ 0.8 °C/W - all critical for compact SMD thermal design and snubberless operation.

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 three-quadrant gate triggering supports simplified drive circuitry while maintaining high noise immunity via elevated dV/dt and dl/dt_c specifications.

The device operates with low on-state losses (V_TM ≤ 1.55 V at 42 A, 25 °C; V_TO ≤ 0.83 V at 150 °C) and tight thermal coupling (R_th(j–c) ≤ 0.8 °C/W), making it suitable for surface-mount designs on insulated metal substrates or direct-bond-copper boards where heatsink size reduction is required.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	30 A - continuous RMS current rating at T_c = 121 °C, defining maximum steady-state load capacity
VDRM / VRRM	800 V - symmetrical repetitive peak off-state voltage, ensuring safe operation on 230 VAC mains with margin
IGT	35 mA max - maximum gate trigger current required for reliable turn-on, enabling low-power driver compatibility
(dl/dt)c	25 A/ms min at T_j = 150 °C - minimum critical rate of decrease of main current before commutation failure, enabling snubberless inductive load control
dV/dt	2000 V/µs min at T_j = 150 °C - minimum static rate of rise of off-state voltage before false triggering, ensuring noise immunity in EMI-prone environments
Rth(j–c)	0.8 °C/W max - junction-to-case thermal resistance, enabling efficient heat transfer to heatsink or PCB copper area
VTO / RD	0.83 V / 16 mΩ at T_j = 150 °C - low conduction loss parameters directly reducing power dissipation and thermal stress in high-duty-cycle applications

Pinout & Package

D²PAK (TO-263) package: surface-mount, single-ended tab (A2), lead-free, halogen-free, ECOPACK2-compliant. Tab is electrically connected to A2 terminal.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Main current terminal; referenced as common return path in standard triac configurations
A2	Anode 2	Main current terminal and thermally conductive tab; electrically tied to heatsink or copper pour for thermal management
G	Gate	Control input; triggers conduction when voltage exceeds V_GT (≤1.3 V) and current exceeds I_GT (≤35 mA)

Key Features

Feature	Design Value
Snubberless operation	Guaranteed (dl/dt)_c ≥ 25 A/ms and dV/dt ≥ 2000 V/µs at 150 °C eliminates need for external RC snubber networks
High-temperature capability	Rated for continuous operation up to T_j = 150 °C, enabling use in sealed enclosures or high-ambient environments
Three-quadrant triggering	Supports gate triggering in quadrants I, II, and III only - reduces gate drive complexity vs. four-quadrant devices
Low conduction loss	V_TO ≤ 0.83 V and R_D ≤ 16 mΩ at 150 °C minimize I²R heating during conduction, improving efficiency and thermal margin
ECOPACK2 compliance	Lead-free terminations and halogen-free molding compound meet RoHS and REACH environmental requirements

Applications

Smart AC Plug Control

Universal Motor Drive

Use Scenario: Compact, embedded smart plug controlling 230 VAC resistive and inductive household loads with zero-crossing or phase-angle dimming.

IC Role / Device Role / Timing Role: Main AC power switch; handles full line voltage/current with integrated thermal protection and noise immunity.

Use Value: Enables snubberless design, reducing BOM count and PCB area while maintaining reliability under fast dV/dt transients from nearby switching loads.

Use Scenario: Speed and torque control of universal motors in vacuum cleaners, power tools, and blenders using phase-controlled AC drive.

IC Role / Device Role / Timing Role: Bidirectional AC power switch synchronized to line zero-crossing or phase angle for precise motor power regulation.

Use Value: Robust (dl/dt)_c ≥ 25 A/ms ensures clean turn-off during high-inductance motor current decay, preventing false re-triggering and arcing.

Water Heater Relay Replacement

Inrush Limiter for AC/DC Rectifiers

Use Scenario: Solid-state replacement for electromechanical relays in tankless water heaters, managing 3–5 kW resistive heating elements.

IC Role / Device Role / Timing Role: High-current AC line switch activated by microcontroller GPIO via optocoupler-isolated gate drive.

Use Value: 30 A RMS rating and 283 A non-repetitive surge capability safely handle cold-resistance inrush without derating or parallel devices.

Use Scenario: Inrush current limiting stage before bridge rectifier input in industrial AC/DC power supplies.

IC Role / Device Role / Timing Role: Pre-charge switch that bypasses NTC thermistor after startup, controlled by timing circuit or MCU.

Use Value: 900 V non-repetitive peak voltage rating (V_DSM/V_VRSM) withstands transient overvoltages during rectifier turn-on and capacitor charging.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB36-800BW	Same 30 A/800 V rating but 2-quad triggering only; lower (dl/dt)_c (15 A/ms) and dV/dt (1000 V/µs); TO-220AB package	Lacks snubberless capability for high-inductance loads; requires heatsink mounting with insulator	Select when cost sensitivity outweighs thermal density needs and snubberless operation is not required
T3050H-8G-TR	Higher 50 A RMS rating; identical 800 V, 150 °C, and D²PAK package; same Snubberless architecture and quadrant support	Over-specified for 30 A applications; higher conduction loss at partial load due to larger die	Select when future-proofing for higher load growth or parallel device redundancy is needed

Compared with BTB36-800BW and T3050H-8G-TR, the T3035H-8G-TR uniquely balances 30 A capacity, D²PAK SMD integration, and guaranteed snubberless performance - making it optimal for space-constrained, thermally demanding, and EMI-heavy AC control designs where reliability trumps raw current headroom.

Availability

T3035H-8G-TR is available at Aetrix Electronics and suitable for home appliance control, industrial motor drives, and smart energy management systems requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for T3035H-8G-TR 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 markets.

The T3035H-8G-TR belongs to ST's STPOWER Triac family, engineered specifically for high-efficiency, snubberless AC power control in compact, thermally constrained applications such as smart home devices and white goods.

FAQ

What is the maximum allowable case temperature for continuous 30 A RMS operation?

The datasheet specifies IT(RMS) = 30 A at T_c = 121 °C. Operation above this case temperature requires derating per Figure 2; at T_c = 130 °C, maximum RMS current drops to ~27 A. Thermal design must ensure case temperature remains ≤121 °C under worst-case ambient and airflow conditions.

Can T3035H-8G-TR be used without a heatsink in free-air convection?

No - at 30 A RMS, junction temperature would exceed 150 °C without heatsinking. Figure 3 shows free-air IT(RMS) ≤ 4.5 A at 25 °C ambient. For full-rated operation, a heatsink with R_th(c–a) ≤ 10 °C/W (per Figure 6) and adequate copper area (≥16.9 cm² per Figure 7) is mandatory.

Is gate resistor selection critical for reliable triggering?

Yes - the datasheet specifies I_GT ≤ 35 mA and V_GT ≤ 1.3 V. A 330 Ω gate resistor with 12 V drive yields ~36 mA peak current, satisfying both limits. Higher resistance risks insufficient I_GT; lower resistance increases gate power dissipation beyond P_GM = 5 W limit during short pulses.

Does T3035H-8G-TR support four-quadrant triggering?

No - it is specified for three-quadrant operation (Quadrants I, II, and III only). Quadrant IV triggering is not guaranteed and may result in inconsistent turn-on or increased gate stress. Gate drive circuits must avoid negative gate-to-A1 voltage when A2 is negative relative to A1.

T3035H-8G-TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Snubberless™

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

Packaging:: Tape & Reel (TR)

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-TR FAQ

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

Please submit a Request for Quotation (RFQ) for T3035H-8G-TR 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-TR reliable?

The price and inventory of T3035H-8G-TR 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-TR is usually 5 days.

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your T3035H-8G-TR 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-TR?

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

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

All T3035H-8G-TR 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-TR meets industry standards.

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

All T3035H-8G-TR units undergo pre-shipment inspection (PSI). If there is an issue with T3035H-8G-TR, 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-TR part is unused and in its original packaging.

Return procedure for T3035H-8G-TR:

1.Submit a request within 90 days.

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

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