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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics T835-600G

Name: T835-600G
Brand: STMicroelectronics
SKU: T835-600G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T835-600G

Manufacturer:: STMicroelectronics

Category:: TRIACs

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

Datasheet:: T835-600G.pdf

Description:: TRIAC ALTERNISTOR 600V 8A D2PAK

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Product details

Overview

T835-600G from STMicroelectronics is a snubberless, 3-quadrant logic-level triac rated for 8 A RMS on-state current and 600 V repetitive peak off-state voltage (VDRM/VRRM), with 35 mA maximum gate trigger current (IGT). It operates across -40 °C to +125 °C junction temperature and features high commutation performance for inductive loads. It is used in phase-control motor speed controllers and solid-state relays requiring robust AC switching without external snubbers.

For engineers reviewing the T835-600G datasheet, T835-600G pinout, T835-600G application, or T835-600G equivalent, key selection criteria include dV/dt immunity (400 V/µs at 125 °C), critical commutation current (dl/dt)c ≥ 3.5 A/ms, low 1.55 V on-state voltage at 11 A, insulated thermal resistance (Rth(j-c) = 1.6 °C/W), and D²PAK package compatibility with high-power PCB layouts.

Technical Context

This triac uses a 3-quadrant triggering architecture optimized for logic-level drive, enabling direct interface with microcontrollers without gate amplification. Its snubberless design relies on enhanced dV/dt immunity (400 V/µs) and high (dl/dt)c (≥3.5 A/ms) to sustain reliable commutation under inductive load transients.

It supports full-cycle AC conduction with symmetrical bidirectional blocking and latching behavior governed by gate-triggered turn-on and natural current-zero turn-off. The device exhibits low on-state resistance (50 mΩ) and threshold voltage (0.85 V at 125 °C), minimizing conduction losses in continuous-duty applications.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	8 A - Sustains continuous AC load current up to 8 A at case temperature ≤110 °C in D²PAK package.
VDRM / VRRM	600 V - Blocks up to 600 V peak reverse or forward voltage across main terminals A1–A2 before conduction.
IGT (max)	35 mA - Maximum gate current required to reliably trigger conduction at 25 °C; reduced sensitivity improves noise immunity.
dV/dt (min)	400 V/µs - Minimum rate of voltage rise the device withstands without false triggering at 125 °C, enabling snubberless operation.
(dl/dt)c (min)	3.5 A/ms - Minimum critical rate of decrease of on-state current required for reliable commutation at 125 °C.
Rth(j-c)	1.6 °C/W - Junction-to-case thermal resistance enables efficient heat transfer to heatsink in D²PAK mounting configuration.
VTM (max)	1.55 V - Maximum on-state voltage drop at 11 A pulse, defining conduction loss ceiling at room temperature.

Pinout & Package

The T835-600G is housed in a D²PAK (TO-263) surface-mount package with three terminals: A1 (MT1), A2 (MT2), and G (Gate). The package features a thermally enhanced exposed tab connected to A2, requiring electrical isolation if mounted to grounded heatsinks.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	AC line or load return path; referenced as common terminal for gate control and current sensing.
A2 (MT2)	Main Terminal 2	High-side AC line connection; electrically tied to exposed thermal pad-requires insulation when heatsink grounded.
G	Gate	Low-energy control input; triggers conduction between A1 and A2 when pulsed with ≥35 mA (max) at 12 V.

Key Features

Feature	Design Value
Snubberless operation	Validated for inductive loads without RC snubber networks due to 400 V/µs dV/dt immunity and 3.5 A/ms (dl/dt)c rating.
Logic-level gate drive	35 mA IGT max enables direct interfacing with 3.3 V/5 V microcontroller GPIO pins without buffer stages.
D²PAK thermal performance	1.6 °C/W Rth(j-c) supports 8 A RMS operation with minimal heatsinking-ideal for space-constrained industrial PCBs.
3-quadrant triggering	Operates in quadrants I, II, and III only-eliminates false triggering from negative gate pulses and improves EMI robustness.
High commutation reliability	Guaranteed turn-off at zero-crossing under inductive loads up to 8 A, verified per IEC 61000-4-4 surge immunity standards.

Applications

Motor Speed Control

Heating Regulation

Use Scenario: Variable-speed control of single-phase induction motors in HVAC blowers and appliance fans.

IC Role / Device Role / Timing Role: AC power switch modulating RMS voltage via phase-angle control synchronized to line zero-crossing.

Use Value: Eliminates need for external snubber components while sustaining 8 A motor startup surges and maintaining <1.55 V conduction drop.

Use Scenario: Precise temperature regulation in electric ovens, soldering irons, and industrial heating elements.

IC Role / Device Role / Timing Role: Solid-state relay replacing electromechanical contactors to enable fast, silent, wear-free on/off cycling.

Use Value: 35 mA logic-level gate drive allows direct MCU PWM timing control without level-shifting circuitry.

Light Dimming

Static Relay

Use Scenario: Leading-edge dimming of incandescent and halogen lamps in residential and commercial lighting systems.

IC Role / Device Role / Timing Role: Bidirectional AC switch triggered at programmable phase angles to adjust lamp RMS voltage.

Use Value: 600 V VDRM ensures safe operation across 230 VAC mains with margin; 400 V/µs dV/dt prevents false firing during line transients.

Use Scenario: Replacement of mechanical relays in PLC output modules and industrial control panels.

IC Role / Device Role / Timing Role: High-reliability AC load switch providing galvanic isolation and >100,000 cycle lifetime.

Use Value: D²PAK package enables automated SMT assembly and thermal management superior to TO-220 alternatives.

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTA08-600BW	TO-220AB insulated package; higher Rth(j-c) = 2.5 °C/W; same 600 V / 8 A / 50 mA IGT rating.	Requires mechanical mounting and thermal interface; suited for through-hole prototyping or legacy board designs.	Select when heatsink integration mandates screw-down mounting or UL-rated 2500 VRMS isolation is mandatory.
T850-600G	D²PAK package; identical footprint; higher 50 mA IGT; improved dV/dt = 1000 V/µs and (dl/dt)c = 4.5 A/ms.	Higher gate drive margin and commutation robustness-preferred for noisy industrial environments or high-L loads.	Select when upgrading for enhanced noise immunity or operating near thermal limits where tighter dV/dt margin is critical.

Compared with BTA08-600BW, T835-600G offers superior thermal efficiency and SMT scalability; compared with T850-600G, it trades slightly lower dV/dt immunity for reduced gate drive demand-making it optimal for cost-sensitive, logic-driven motor control.

Availability

T835-600G is available at Aetrix Electronics and suitable for motor speed control, heating regulation, light dimming, and static relay applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant D²PAK packaging.

Supply support for T835-600G 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The T8 series triacs are part of ST's high-reliability power switching portfolio, engineered specifically for snubberless AC control in inductive and resistive loads across industrial automation and home appliance platforms.

FAQ

What is the maximum junction temperature for continuous operation?

The T835-600G has an operating junction temperature range of -40 °C to +125 °C. Continuous operation at 125 °C requires maintaining case temperature ≤110 °C per datasheet derating curves, achievable with proper D²PAK heatsinking and copper area (≥1 cm²).

Does T835-600G require a heatsink in 8 A applications?

Yes-when conducting 8 A RMS continuously, the D²PAK package requires a heatsink or ≥10 cm² of 2 oz copper pour to limit junction temperature within 125 °C. Thermal resistance data shows Rth(j-a) = 45 °C/W with 1 cm² copper, necessitating active or passive thermal management.

Can T835-600G replace a standard 4-quadrant triac in existing designs?

No-it is a 3-quadrant device and does not trigger in quadrant IV. Designs relying on negative gate pulses relative to A1 must be revalidated; gate drive circuits must ensure gate polarity remains positive during conduction to avoid misfiring or latch-up.

Is the D²PAK thermal pad electrically isolated?

No-the exposed thermal pad on the D²PAK package is internally connected to terminal A2 (MT2). Electrical isolation from the heatsink or PCB ground plane is mandatory unless A2 is intentionally held at system ground potential.

T835-600G Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tube

Product Status:: Active

Triac Type:: Alternistor - Snubberless

Voltage - Off State:: 600 V

Current - On State (It (RMS)) (Max):: 8 A

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

Current - Non Rep. Surge 50, 60Hz (Itsm):: 80A, 84A

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

Current - Hold (Ih) (Max):: 35 mA

Configuration:: Single

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

T835-600G FAQ

1.How can I place an order for T835-600G through Aetrix?

Please submit a Request for Quotation (RFQ) for T835-600G 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 T835-600G reliable?

The price and inventory of T835-600G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T835-600G is usually 5 days.

3.What payment methods are accepted for T835-600G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T835-600G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T835-600G?

T835-600G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T835-600G 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 T835-600G?

For technical support, including T835-600G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T835-600G requirements.

6.How does Aetrix verify that T835-600G is sourced from the original manufacturer or authorized distributors?

All T835-600G 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 T835-600G meets industry standards.

7.What is the process for return or replacement of T835-600G?

All T835-600G units undergo pre-shipment inspection (PSI). If there is an issue with T835-600G, 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 T835-600G part is unused and in its original packaging.

Return procedure for T835-600G:

1.Submit a request within 90 days.

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

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