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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics T810T-8G

Name: T810T-8G
Brand: STMicroelectronics
SKU: T810T-8G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T810T-8G

Manufacturer:: STMicroelectronics

Category:: TRIACs

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

Datasheet:: T810T-8G.pdf

Description:: TRIAC SENS GATE 800V 8A D2PAK

Quantity:: RFQ Add To RFQ list

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Inventory:3,091

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Product details

Overview

T810T-8G from STMicroelectronics is a logic-level, 8 A RMS, 800 V repetitive peak voltage triac in D²PAK surface-mount package, optimized for phase-angle and on/off AC switching of resistive loads. It features 10 mA gate trigger current (IGT), 150 °C maximum junction temperature, and three-quadrant operation with 900 V non-repetitive surge capability. Used in hybrid relays and inrush limiting circuits where direct MCU control and high thermal margin are required.

For engineers reviewing the T810T-8G datasheet, T810T-8G pinout, T810T-8G application, or T810T-8G equivalent, key selection criteria include gate drive simplicity (10 mA IGT), thermal derating up to 150 °C, dV/dt immunity (≥170 V/µs at 150 °C), and D²PAK SMT compatibility for automated assembly in compact power modules.

Technical Context

The T810T-8G is a three-quadrant logic-level triac designed for low-power gate drive and high EMI robustness in AC line switching. Its gate threshold (VGT ≤ 1.3 V) and low IGT (max 10 mA) enable direct interfacing with 3.3 V/5 V MCUs without external amplification. The device supports full sine-wave conduction with IT(RMS) = 8 A at TC = 131 °C.

It delivers enhanced commutation reliability under resistive loads via high critical dV/dt (≥250 V/µs at 125 °C) and high (dI/dt)c (≥6 A/ms at 125 °C). Thermal performance is defined by Rth(j–c) = 1.9 °C/W, enabling efficient heatsinking in space-constrained SMT designs.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	8 A - continuous RMS load current at TC = 131 °C, defining maximum steady-state power handling
VDRM / VRRM	800 V - maximum repetitive blocking voltage at TJ = 125 °C, suitable for 230 VAC mains with safety margin
IGT	10 mA - max gate trigger current, enabling direct drive from standard GPIO pins without buffer stage
Tj Range	−40 to +150 °C - extended operating junction temperature enables higher ambient deployment in enclosed systems
VDSM / VRSM	900 V - non-repetitive surge withstand, supporting transient protection in crowbar and overvoltage applications
dV/dt (min)	170 V/µs at TJ = 150 °C - immunity to false triggering during fast voltage transients on AC lines
Rth(j–c)	1.9 °C/W - thermal resistance from junction to case, enabling precise heatsink sizing for thermal management

Pinout & Package

D²PAK (TO-263) surface-mount package with exposed metal tab for thermal and electrical connection; halogen-free, RoHS-compliant ECOPACK2 grade; UL94 V0 molding compound; footprint optimized for 10.3 mm × 16.9 mm PCB pad layout.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Main terminal 1 - referenced ground point in standard triac configuration; carries full load current
A2	Anode 2	Main terminal 2 - connected to AC line or load return; polarity determines quadrant conduction path
G	Gate	Control input - triggers conduction when ≥10 mA pulse applied; compatible with 3.3 V/5 V logic levels

Key Features

Feature	Design Value
Three-quadrant operation	Enables gate-triggered conduction in Quadrants I, II, and III only - reduces EMI vs. four-quadrant devices and improves noise immunity
Logic-level gate drive	10 mA IGT max allows direct MCU GPIO control without discrete driver circuitry, reducing BOM count and board area
150 °C junction rating	Extends usable thermal headroom in sealed enclosures or high-ambient environments, improving system reliability without oversized heatsinks
High commutation robustness	Guaranteed turn-off under resistive loads with (dI/dt)c ≥ 4.2 A/ms at TJ = 150 °C, preventing false re-triggering during zero-crossing transitions
Snubberless design	Eliminates need for external RC snubber networks in many resistive-load applications, simplifying layout and lowering cost

Applications

Home Appliance Motor Control

Hybrid Relay Replacement

Use Scenario: Controlling heating elements and universal motors in coffee makers, rice cookers, and vacuum cleaners using phase-angle dimming.

IC Role / Device Role / Timing Role: Main AC power switch performing bidirectional conduction synchronized to AC zero-crossing for precise power regulation.

Use Value: Direct MCU control eliminates optocoupler+driver stages, reducing component count while maintaining 150 °C thermal margin in thermally dense enclosures.

Use Scenario: Replacing electromechanical relays in HVAC zone actuators and smart lighting panels to eliminate contact wear and bounce.

IC Role / Device Role / Timing Role: Solid-state AC switch providing silent, bounce-free on/off switching with integrated overvoltage crowbar protection.

Use Value: 900 V VRSM rating enables safe clamping during lightning-induced surges; D²PAK thermal performance supports >100,000-cycle reliability without derating.

Inrush Current Limiting

Overvoltage Crowbar Protection

Use Scenario: Soft-starting transformers and large capacitive loads in industrial power supplies and test equipment.

IC Role / Device Role / Timing Role: Controlled turn-on device limiting peak inrush current by delaying conduction angle in first few AC cycles.

Use Value: Low IGT and high dV/dt immunity prevent false triggering during high-slew-rate inrush events, ensuring stable soft-start behavior.

Use Scenario: Protecting downstream SMPS and microcontrollers from sustained overvoltage events on 230 VAC mains inputs.

IC Role / Device Role / Timing Role: Fast-acting crowbar element triggered by overvoltage detection circuit to short AC line and blow fuse.

Use Value: 900 V non-repetitive surge rating ensures reliable conduction under fault conditions without catastrophic failure, meeting IEC 61000-4-5 requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTA08-600BWRG	600 V VDRM, 8 A IT(RMS), TO-220 package, 50 mA IGT	Requires gate driver stage; limited to lower-voltage 120 VAC or 230 VAC with reduced safety margin	Select when through-hole mounting is mandatory and 600 V blocking suffices
T810T-8GTR	Identical electrical specs; tape-and-reel packaging (1000 pcs), same D²PAK footprint	No functional difference - optimized for automated SMT production instead of tube delivery	Select for high-volume pick-and-place assembly; identical performance and thermal behavior

Compared with BTA08-600BWRG, the T810T-8G offers 200 V higher blocking voltage and 5× lower gate drive requirement, enabling simpler, more robust 230 VAC designs; versus T810T-8GTR, it differs only in packaging format-tube vs. tape-and-reel-with no electrical or thermal distinction.

Availability

T810T-8G is available at Aetrix Electronics and suitable for hybrid relay replacement, inrush current limiting, and overvoltage crowbar protection requiring stable component supply across industrial automation, appliance manufacturing, and power supply design programs.

Supply support for T810T-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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The T-series triac product line targets EMI-sensitive, space-constrained AC control applications-emphasizing logic-level gate drive, high dV/dt immunity, and surface-mount packaging for modern SMT power electronics.

FAQ

What is the maximum allowable gate voltage for T810T-8G?

The absolute maximum peak gate voltage (VGM) is 5 V at TJ = 150 °C. Exceeding this risks permanent gate oxide damage. For reliable operation, gate drive circuits must clamp voltage to ≤5 V during transients, especially when using inductive gate drivers or long PCB traces susceptible to ringing.

Can T810T-8G be used in four-quadrant triggering configurations?

No - the T810T-8G is explicitly a three-quadrant triac (QI, QII, QIII only) and does not support reliable triggering in Quadrant IV. Attempting QIV operation results in inconsistent turn-on and potential latch-up failure; use a four-quadrant triac like BTB16-600BW if QIV capability is required.

How does thermal resistance change with copper area under the D²PAK tab?

Rth(j–a) decreases from ~45 °C/W (no copper) to ~25 °C/W with 2 cm² of 35 µm copper on FR4, per Figure 14. Increasing copper area beyond 2 cm² yields diminishing returns; optimal thermal performance requires soldering the tab directly to ≥2 cm² thermal pad with ≥6 thermal vias to inner ground planes.

Is snubber circuitry required for resistive loads?

Snubbers are not required for pure resistive loads due to the T810T-8G's snubberless design and high dV/dt immunity (≥170 V/µs at 150 °C). However, snubbers remain recommended for inductive or capacitive loads, or when operating near VDRM limits, to suppress voltage overshoot during commutation.

T810T-8G 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:: 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):: 60A, 63A

Current - Gate Trigger (Igt) (Max):: 10 mA

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

Configuration:: Single

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

T810T-8G FAQ

1.How can I place an order for T810T-8G through Aetrix?

Please submit a Request for Quotation (RFQ) for T810T-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 T810T-8G reliable?

The price and inventory of T810T-8G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T810T-8G is usually 5 days.

3.What payment methods are accepted for T810T-8G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T810T-8G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T810T-8G?

T810T-8G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T810T-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 T810T-8G?

For technical support, including T810T-8G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T810T-8G requirements.

6.How does Aetrix verify that T810T-8G is sourced from the original manufacturer or authorized distributors?

All T810T-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 T810T-8G meets industry standards.

7.What is the process for return or replacement of T810T-8G?

All T810T-8G units undergo pre-shipment inspection (PSI). If there is an issue with T810T-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 T810T-8G part is unused and in its original packaging.

Return procedure for T810T-8G:

1.Submit a request within 90 days.

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

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