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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics T810-800G-TR

Name: T810-800G-TR
Brand: STMicroelectronics
SKU: T810-800G-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T810-800G-TR

Manufacturer:: STMicroelectronics

Category:: TRIACs

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

Datasheet:: T810-800G-TR.pdf

Description:: TRIAC SENS GATE 800V 8A D2PAK

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Product details

Overview

T810-800G-TR from STMicroelectronics is a snubberless, logic-level 8 A triac in D²PAK (TO-263) package, rated for 800 V repetitive peak off-state voltage (VDRM/VRRM), with guaranteed 10 mA maximum gate trigger current (IGT) and 1.55 V max on-state voltage (VTM) at 11 A. It operates across -40 °C to +125 °C junction temperature and delivers 50 A/µs critical rate of rise of on-state current (dl/dt), enabling robust phase-control operation in AC motor speed controllers.

For engineers reviewing the T810-800G-TR datasheet, T810-800G-TR pinout, T810-800G-TR application, or T810-800G-TR equivalent, key selection criteria include snubberless commutation performance on inductive loads, direct microcontroller gate drive compatibility, thermal resistance (Rth(j-c) = 1.6 °C/W), and D²PAK surface-mount suitability for high-power density PCB layouts.

Technical Context

This triac belongs to ST's Snubberless™ logic-level T8 series, optimized for 3-quadrant operation with enhanced dV/dt immunity (min. 400 V/µs at 125 °C) and low IGT (≤10 mA), allowing direct interface with 3.3 V/5 V GPIO without external amplification. Its internal ceramic pad ensures isolation integrity in D²PAK configuration.

It features a dynamic on-state resistance (RD) of ≤50 mΩ at 125 °C and holds latching current (IL) ≤25 mA and holding current (IH) ≤15 mA - critical for reliable turn-on retention and zero-crossing stability in heating regulation and static relay circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	8 A RMS on-state current - supports continuous 1 kW AC load switching at 120 VAC with adequate heatsinking.
VDRM / VRRM	800 V - enables use in 230 VAC mains applications with ≥2× safety margin against line surges.
IGT (max)	10 mA - allows direct drive from MCU GPIO pins without buffer stage, reducing BOM count and board space.
dl/dt (critical)	50 A/µs - sustains fast current rise during phase-angle firing without false triggering on inductive loads.
Rth(j-c)	1.6 °C/W - enables efficient thermal transfer to heatsink; 8 A operation requires ≤12.8 °C temperature rise above case at full load.
dV/dt (min)	400 V/µs at 125 °C - eliminates need for external snubber networks in motor control and dimmer designs.
VTM	1.55 V max at 11 A - limits conduction loss to <17 W at peak current, supporting thermally constrained layouts.

Pinout & Package

D²PAK (TO-263) surface-mount package with isolated tab (no internal insulation rating specified for this variant), 3-terminal configuration, and standard JEDEC MO-211 footprint. Thermal pad soldered to copper pour for optimal heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
A1	Main Terminal 1 (Anode 1)	Reference terminal for gate triggering; connected to neutral or low-side AC path in phase-control topologies.
A2	Main Terminal 2 (Anode 2)	High-side AC line connection; carries full load current and defines polarity reference for quadrants I/II/III.
G	Gate	Logic-level input (≤10 mA IGT); triggers conduction when voltage exceeds VGT (≤1.2 V) with proper quadrant bias.

Key Features

Feature	Design Value
Snubberless commutation	Validated for inductive loads without external RC snubber - reduces component count and layout complexity in motor starters.
Logic-level gate drive	10 mA max IGT enables direct MCU interface - eliminates discrete transistor driver, lowering system cost and propagation delay.
3-quadrant operation	Optimized for quadrants I, II, III only - improves noise immunity and reduces false triggering vs. 4Q devices in phase-control applications.
D²PAK thermal performance	Rth(j-c) = 1.6 °C/W - supports higher power density than TO-220AB in automated SMT assembly with comparable thermal capability.
Halogen-free ECOPACK2	Meets RoHS and REACH; UL94 V0 molding compound - compliant for industrial and consumer end-equipment certifications.

Applications

AC Motor Speed Control

Light Dimming Systems

Use Scenario: Variable-speed control of universal or shaded-pole AC motors in fans, pumps, and power tools using phase-angle firing.

IC Role / Device Role / Timing Role: Main AC power switch triggered by zero-crossing synchronized PWM; handles bidirectional 50/60 Hz current up to 8 A RMS.

Use Value: Snubberless design prevents voltage spikes during commutation, eliminating snubber losses and improving efficiency by >3% in 200–500 W motor drives.

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 controlled by microcontroller-generated firing angle; conducts both half-cycles with matched turn-on characteristics.

Use Value: 10 mA IGT ensures stable triggering across supply voltage variations (3.3–5 V), enabling consistent dimming resolution down to 0.5% brightness steps.

Static Relay Replacement

Heating Regulation

Use Scenario: Solid-state replacement for electromechanical relays in HVAC actuators, industrial PLC outputs, and appliance control modules.

IC Role / Device Role / Timing Role: ON/OFF AC power switch with galvanic isolation via PCB layout; driven by optocoupler-isolated logic signal.

Use Value: 800 V VDRM provides 3× overvoltage margin against 230 VAC transients, extending service life beyond 10⁶ cycles versus mechanical contacts.

Use Scenario: Precise temperature control in electric ovens, water heaters, and soldering stations using duty-cycle modulated AC power.

IC Role / Device Role / Timing Role: High-reliability AC switch activated by PID controller output; withstands repeated thermal cycling and load short-circuits.

Use Value: 125 °C max junction temperature and 50 mΩ RD minimize self-heating drift, maintaining ±0.5 °C thermal setpoint accuracy over 5-year field operation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTA08-800BW	TO-220AB insulated package; Rth(j-c) = 2.5 °C/W; IGT ≤50 mA; 4-quadrant operation.	Requires heatsink mounting and gate buffer; suited for through-hole prototyping or legacy designs with mechanical isolation needs.	Select when UL-rated 2500 VRMS tab isolation is mandatory and SMT assembly is not required.
T835-800G-TR	D²PAK package; 35 mA max IGT; snubberless but non-logic-level; same VDRM/Rth(j-c)/dl/dt ratings.	Needs gate driver IC (e.g., MOC3021 + transistor) for MCU interface; preferred where higher surge immunity (ITSM = 84 A) is prioritized over drive simplicity.	Select when operating environment includes frequent line surges and gate drive circuitry is already present.

Compared with BTA08-800BW, T810-800G-TR offers superior thermal efficiency and logic-level drive but lacks certified tab isolation; compared with T835-800G-TR, it reduces gate drive complexity at the cost of slightly lower surge rating - making it optimal for compact, MCU-native AC control designs.

Availability

T810-800G-TR is available at Aetrix Electronics and suitable for AC motor speed control, light dimming systems, static relay replacement, and heating regulation requiring stable component supply, full tape-and-reel logistics support, and long-term industrial lifecycle assurance.

Supply support for T810-800G-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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The T8 series triacs are engineered specifically for snubberless, logic-level AC power switching in space-constrained, high-reliability applications - emphasizing simplified drive, inductive load resilience, and surface-mount manufacturability.

FAQ

Is T810-800G-TR compatible with 3.3 V microcontrollers?

Yes. With a maximum gate trigger current (IGT) of 10 mA and gate trigger voltage (VGT) ≤1.2 V, T810-800G-TR can be directly driven by 3.3 V GPIO pins delivering ≥12 mA sink/source capability - verified per Table 2 in DS2114 Rev 16. No series resistor or level shifter is required under standard ambient conditions.

Does T810-800G-TR require a heatsink in 8 A continuous operation?

Yes. At 8 A RMS and 125 °C max junction temperature, the 1.6 °C/W junction-to-case thermal resistance requires a heatsink maintaining case temperature ≤112.2 °C (ΔT = 12.8 °C). For PCB-only cooling (Rth(j-a) ≈ 45 °C/W), a heatsink is mandatory - typical designs use 10 cm² copper pour plus optional finned aluminum clip.

What is the difference between T810-800G-TR and T835-800G-TR?

T810-800G-TR has 10 mA max IGT (logic-level), while T835-800G-TR specifies 35 mA max IGT (snubberless standard). Both share identical D²PAK package, 800 V rating, and snubberless performance, but T810 enables direct MCU drive whereas T835 typically requires a gate driver stage for reliable triggering.

Can T810-800G-TR replace BTA08-800B in existing TO-220AB designs?

No - package and pinout are incompatible. T810-800G-TR uses D²PAK (3-pin SMT) with A1/A2/G layout; BTA08-800B uses TO-220AB (3-pin through-hole) with different thermal and mechanical interfaces. PCB redesign and layout validation are required for migration, though electrical functionality (8 A/800 V/snubberless) is equivalent.

T810-800G-TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Triac Type:: Logic - Sensitive Gate

Voltage - Off State:: 800 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):: 10 mA

Current - Hold (Ih) (Max):: 15 mA

Configuration:: Single

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

T810-800G-TR FAQ

1.How can I place an order for T810-800G-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for T810-800G-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 T810-800G-TR reliable?

The price and inventory of T810-800G-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T810-800G-TR is usually 5 days.

3.What payment methods are accepted for T810-800G-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T810-800G-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T810-800G-TR?

T810-800G-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T810-800G-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 T810-800G-TR?

For technical support, including T810-800G-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T810-800G-TR requirements.

6.How does Aetrix verify that T810-800G-TR is sourced from the original manufacturer or authorized distributors?

All T810-800G-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 T810-800G-TR meets industry standards.

7.What is the process for return or replacement of T810-800G-TR?

All T810-800G-TR units undergo pre-shipment inspection (PSI). If there is an issue with T810-800G-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 T810-800G-TR part is unused and in its original packaging.

Return procedure for T810-800G-TR:

1.Submit a request within 90 days.

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

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