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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics T3035H-6T

Name: T3035H-6T
Brand: STMicroelectronics
SKU: T3035H-6T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T3035H-6T

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: T3035H-6T.pdf

Description:: TRIAC ALTERNISTOR 600V 30A TO220

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Product details

Overview

T3035H-6T from STMicroelectronics is a 30 A, 600 V Snubberless Triac in TO-220AB package, designed for high-noise industrial AC load control. It delivers 35 mA max gate trigger current, 1000 V/µs dV/dt immunity at 150 °C junction temperature, and operates reliably up to 150 °C with 0.8 °C/W junction-to-case thermal resistance - enabling compact heatsink design in universal motor drives.

For engineers reviewing the T3035H-6T datasheet, T3035H-6T pinout, T3035H-6T application, or T3035H-6T equivalent, this device is selected for robust AC phase control where high commutation capability, low thermal resistance, and snubberless operation under inductive loads are critical.

Technical Context

This triac uses ST's Snubberless technology to guarantee minimum commutation performance and high electrical noise immunity across all three quadrants, validated up to Tj = 150 °C. Its internal ceramic pad provides 2500 VRMS isolation between A2 and mounting surface, supporting insulated mounting in grounded-chassis systems.

It features a low dynamic on-state resistance (15 mΩ at 150 °C) and low threshold voltage (0.80 V), reducing conduction losses during continuous RMS current delivery. The 50 A/µs critical rate of rise of on-state current ensures reliable turn-on even with fast-rising gate drive waveforms.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	30 A - Sustains full-sine AC load current without derating at Tc = 121 °C, enabling direct replacement of electromechanical relays in high-power appliances.
VDRM/VRRM	600 V - Blocks peak line voltages up to 424 V RMS (e.g., 240 VAC mains + margin), suitable for global single-phase grid interfaces.
IGT	35 mA max - Low gate drive requirement compatible with standard microcontroller GPIO or optocoupler outputs without external amplification.
dV/dt immunity	1000 V/µs at Tj = 150 °C - Prevents false triggering from EMI transients in noisy industrial environments (e.g., motor switching, SCR dimmers).
Rth(j-c)	0.8 °C/W - Enables efficient heat transfer to heatsink; allows 30 W power dissipation at only 24 °C case-to-junction delta, minimizing thermal margin overhead.
(dl/dt)c	33 A/ms at Tj = 150 °C - Supports clean commutation of highly inductive loads (e.g., power tool windings) without snubber networks.
Isolation rating	2500 VRMS - Meets reinforced insulation requirements for Class I appliances and industrial controls with grounded metal enclosures.

Pinout & Package

TO-220AB package: Insulated tab (A2), 3-pin through-hole mounting, 0.55 N·m recommended torque, halogen-free molding compound compliant with UL94 V-0 and ECOPACK2.

Pin/Terminal	Circuit Role	Design Meaning
A1	Main terminal 1 (anode 1)	Current return path for quadrant I/II conduction; connected to load neutral or low-side reference in phase-control circuits.
A2	Main terminal 2 (anode 2)	High-side main current path; electrically isolated from tab (non-insulated variant), supports direct heatsink mounting without insulator kit.
G	Gate	Low-energy trigger input; accepts 35 mA pulse to initiate conduction in all quadrants; referenced to A1 for standard firing circuit design.

Key Features

Feature	Design Value
Snubberless operation	Validated 3-quadrant commutation at 150 °C eliminates need for external RC snubbers, reducing BOM count and PCB area in motor control designs.
High-temperature capability	Rated for continuous operation at Tj = 150 °C - enables use in sealed enclosures or high-ambient environments (e.g., HVAC blower housings) without forced cooling.
Low thermal resistance	Rth(j-c) = 0.8 °C/W - permits 30 A RMS conduction with ≤24 °C temperature rise across junction-to-case, simplifying thermal management vs. legacy triacs.
Enhanced noise immunity	1000 V/µs dV/dt at max junction temperature - maintains stable blocking state during fast transients from adjacent IGBTs or contactor switching.
UL certification	UL file E81734 - confirms compliance with UL 1557 for reinforced insulation, supporting safety approval of end equipment without additional isolation testing.

Applications

Power Tool Motor Control

Induction Cooktop Power Stage

Use Scenario: Phase-angle controlled AC supply to universal motors in corded drills and angle grinders, operating continuously under dust and vibration.

IC Role / Device Role / Timing Role: Main power switch executing zero-crossing or phase-shifted firing to regulate motor speed and torque.

Use Value: Snubberless operation avoids capacitor failure in harsh environments; 150 °C rating sustains performance during extended duty cycles without thermal shutdown.

Use Scenario: High-frequency AC power switching to induction heating coils in domestic cooktops, subject to rapid thermal cycling and EMI from adjacent inverters.

IC Role / Device Role / Timing Role: Bidirectional AC switch controlling coil energization timing and duty cycle in resonant half-bridge topologies.

Use Value: 1000 V/µs dV/dt immunity prevents misfiring from inverter-generated transients; low Rth(j-c) enables compact heatsink integration behind glass surface.

Washing Machine Drum Drive

Industrial Fan Speed Regulator

Use Scenario: AC motor speed control in front-load washing machines, requiring silent operation, high reliability over 10,000 cycles, and moisture resistance.

IC Role / Device Role / Timing Role: Solid-state relay replacing mechanical contactors for drum motor start/stop and spin-speed modulation.

Use Value: 2500 VRMS isolation meets IEC 60335 creepage/clearance requirements; 30 A RMS rating handles locked-rotor surge without degradation.

Use Scenario: Variable-speed control of 3-phase fan banks in HVAC air handling units, exposed to ambient temperatures up to 70 °C and conducted EMI from VFDs.

IC Role / Device Role / Timing Role: Single-phase AC power modulator per fan phase, synchronized to system controller for precise airflow regulation.

Use Value: TO-220AB mechanical robustness withstands vibration; 33 A/ms (dl/dt)c ensures clean turn-off during inductive flyback without snubber-induced ringing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar AC phase-control applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB36-600BW	36 A RMS, 600 V, TO-220AB, 50 mA IGT, 1200 V/µs dV/dt at 25 °C (derates to ~750 V/µs at 150 °C)	Lacks UL certification and 2500 VRMS isolation; requires external snubber for inductive loads at high Tj	Select when higher surge rating is prioritized over certified isolation and snubberless operation.
Q6035LH4	35 A RMS, 600 V, TO-220AB, 35 mA IGT, 1000 V/µs dV/dt at 125 °C (not specified at 150 °C), no UL file	Lower max junction temperature (125 °C), unverified 3-quadrant commutation above 125 °C	Choose for cost-sensitive consumer appliances where 125 °C ambient ceiling is sufficient and UL listing is not required.

Compared with BTB36-600BW and Q6035LH4, T3035H-6T uniquely combines UL-certified 2500 VRMS isolation, guaranteed 1000 V/µs dV/dt at 150 °C, and snubberless 3-quadrant operation - making it the only option qualified for safety-critical, high-temperature industrial motor control without design compromises.

Availability

T3035H-6T is available at Aetrix Electronics and suitable for power tool motor control, induction cooktop power stages, washing machine drum drives, and industrial fan speed regulators requiring stable component supply across multi-year production programs.

Supply support for T3035H-6T 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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

T3035H-6T belongs to ST's H-series Snubberless Triac product line, engineered specifically for high-reliability AC load switching in thermally constrained, EMI-heavy environments where traditional triacs require snubbers or derating.

FAQ

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

The datasheet specifies IT(RMS) = 30 A at Tc = 121 °C for TO-220AB packages. Exceeding this case temperature requires linear derating per Figure 2; at Tc = 135 °C, maximum RMS current drops to approximately 25 A. Thermal design must ensure heatsink interface resistance keeps case temperature within limit under worst-case ambient and airflow conditions.

Does T3035H-6T require a heatsink in all applications?

Yes - even at 30 A RMS, junction-to-case thermal resistance (0.8 °C/W) combined with on-state power loss (~1.55 V × 30 A × conduction angle factor) generates >20 W of heat. Without a heatsink, junction temperature would exceed 150 °C within seconds. Minimum heatsink size is determined by Rth(j-a) target and ambient temperature per Figure 13.

Can T3035H-6T be used in DC applications?

No - as a triac, it is inherently an AC device requiring bidirectional current flow and natural current zero-crossing for commutation. Applying DC voltage will cause latch-up and destructive failure. For DC solid-state switching, discrete MOSFETs or IGBTs with freewheeling diodes must be used instead.

Is the TO-220AB tab electrically insulated in T3035H-6T?

No - T3035H-6T uses the standard TO-220AB package with non-insulated tab connected to A2. For insulated mounting, the variant T3035H-6I (TO-220AB Ins.) must be selected, which integrates a ceramic pad providing 2500 VRMS isolation between A2 and the mounting surface.

T3035H-6T Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Snubberless™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Triac Type:: Alternistor - Snubberless

Voltage - Off State:: 600 V

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

Voltage - Gate Trigger (Vgt) (Max):: 1 V

Current - Non Rep. Surge 50, 60Hz (Itsm):: 270A, 284A

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:: Through Hole

Supplier Device Package:: TO-220

T3035H-6T FAQ

1.How can I place an order for T3035H-6T through Aetrix?

Please submit a Request for Quotation (RFQ) for T3035H-6T 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-6T reliable?

The price and inventory of T3035H-6T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T3035H-6T is usually 5 days.

3.What payment methods are accepted for T3035H-6T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T3035H-6T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T3035H-6T?

T3035H-6T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T3035H-6T 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-6T?

For technical support, including T3035H-6T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T3035H-6T requirements.

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

All T3035H-6T 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-6T meets industry standards.

7.What is the process for return or replacement of T3035H-6T?

All T3035H-6T units undergo pre-shipment inspection (PSI). If there is an issue with T3035H-6T, 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-6T part is unused and in its original packaging.

Return procedure for T3035H-6T:

1.Submit a request within 90 days.

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

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