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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics T810T-6I

Name: T810T-6I
Brand: STMicroelectronics
SKU: T810T-6I
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T810T-6I

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: T810T-6I.pdf

Description:: TRIAC SENS GATE 600V 8A TO220AB

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Product details

Overview

T810T-6I from STMicroelectronics is a logic-level, snubberless 8 A, 600 V RMS triac in a TO-220AB insulated package, designed for AC line switching with high commutation robustness and low thermal resistance (R_th(j-c) = 2.8 °C/W). It features 10 mA gate trigger current (I_GT) in Quadrants I–III, 1.3 V max gate trigger voltage (V_GT), and supports phase-angle control in motor-driven power tools.

For engineers reviewing the T810T-6I datasheet, T810T-6I pinout, T810T-6I application, or T810T-6I equivalent, this device is selected for cost-sensitive, thermally constrained AC load switching where snubber-free operation, 2500 V_rms isolation, and reliable turn-on at low gate drive are required.

Technical Context

The T810T-6I is a three-quadrant logic-level triac optimized for direct microcontroller interfacing without external gate amplification. Its 10 mA I_GT (QI–QIII) and 1.3 V V_GT enable compatibility with 3.3 V/5 V GPIOs, while its 100 V/µs dV/dt immunity at 125 °C ensures noise-resistant turn-off in noisy AC environments.

It delivers 8 A RMS on-state current at T_c = 97 °C with 1.60 V max on-state voltage (V_T) at 25 °C and 0.87 V threshold (V_TO) at 125 °C, supported by a dynamic resistance of 60 mΩ - enabling efficient conduction and low self-heating in compact heatsink designs.

Key Specifications

Parameter	Value and Actual Design Meaning
I_T(RMS)	8 A at T_c = 97 °C - supports continuous AC load switching up to 1.8 kW resistive at 230 VAC with standard heatsinking
V_DRM/V_RRM	600 V - blocks full-wave AC mains surges up to 600 V peak, suitable for 230 VAC and 120 VAC global applications
I_GT (QI–QIII)	10 mA max - enables direct drive from MCU GPIO without buffer stage, reducing BOM count and PCB area
R_th(j-c)	2.8 °C/W - allows 2.2 W power dissipation at ΔT = 6.2 °C above case, supporting compact thermal design
dV/dt (min)	100 V/µs at T_j = 125 °C - suppresses false triggering from EMI or fast transients in motor commutation circuits
V_ISO	2500 V_rms - provides reinforced insulation between main terminals and heatsink-mounting tab per IEC/UL standards
I_H	15 mA max - ensures stable latching after turn-on even at elevated junction temperatures up to 125 °C

Pinout & Package

Package: TO-220AB insulated (plastic body with isolated metal tab); UL certified (E81734), RoHS compliant, ECOPACK® grade, 2.3 g weight, 2500 V_rms isolation rating.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	Reference terminal for gate triggering; connected to neutral or low-side AC path in most phase-control topologies
A2 (MT2)	Main Terminal 2	High-side AC line connection; polarity relative to A1 defines quadrant conduction behavior
G	Gate	Logic-level trigger input; 10 mA pulse sufficient for turn-on in QI, QII, and QIII; no snubber required

Key Features

Feature	Design Value
Snubberless™ operation	Eliminates external RC snubber network in >95% of general-purpose AC switching designs, reducing component count and board space
Logic-level gate sensitivity	10 mA I_GT (QI–QIII) enables direct interface with 3.3 V/5 V MCUs - no level-shifting or driver IC needed
High dV/dt immunity	100 V/µs minimum at 125 °C prevents false triggering during motor brush noise or inductive load switching
Low thermal resistance	2.8 °C/W junction-to-case allows 8 A RMS operation with minimal heatsink volume in space-constrained appliances
Reinforced insulation	2500 V_rms isolation meets safety requirements for double-insulated consumer products without creepage/clearance redesign

Applications

Power Tool Motor Control

Dimmable LED Lighting Driver

Use Scenario: Variable-speed control of universal motors in corded drills and sanders using phase-angle dimming.

IC Role / Device Role / Timing Role: Main AC power switch triggered by zero-crossing synchronized PWM; handles 8 A inrush and 5 A continuous load.

Use Value: Snubberless operation eliminates snubber losses and capacitor aging issues; 10 mA gate drive simplifies MCU firmware timing.

Use Scenario: Leading-edge dimming interface between TRIAC-dimmable wall controllers and constant-current LED drivers.

IC Role / Device Role / Timing Role: AC line switch synchronizing dimmer signal to mains phase; conducts 600 V blocking and 8 A peak currents.

Use Value: 100 V/µs dV/dt immunity prevents misfiring from dimmer-generated harmonics; 2500 V_rms isolation ensures user safety compliance.

Small Appliance Heater Switch

Inrush Current Limiter

Use Scenario: On/off control of 1.5 kW heating elements in kettles and coffee makers with thermal cutoff integration.

IC Role / Device Role / Timing Role: High-reliability AC load switch rated for 100,000+ cycles; operates at T_j ≤ 125 °C under full load.

Use Value: Low R_th(j-c) (2.8 °C/W) maintains junction temperature within spec without oversized heatsinks; RoHS-compliant package meets global regulatory requirements.

Use Scenario: Soft-start circuit limiting inrush into transformer-based power supplies during cold startup.

IC Role / Device Role / Timing Role: Delayed turn-on device triggered after NTC thermistor cooldown; handles 60 A non-repetitive surge (20 ms, 50 Hz).

Use Value: 60 A I_TSM rating absorbs transformer magnetizing inrush without degradation; 26 A²s I²t withstand enables single-shot crowbar protection.

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	Standard 8 A triac, 50 mA I_GT, no snubberless architecture, TO-220 non-insulated package	Requires external snubber and gate driver; lacks 2500 V_rms isolation; lower dV/dt (50 V/µs)	Select when cost is primary constraint and isolation/snubber reduction are not required
T825T-6I	Same package and voltage rating, but 25 mA I_GT, higher dV/dt (500 V/µs), and 4-quadrant gate sensitivity	Supports full-quadrant triggering (including QIV), better suited for bidirectional control in solid-state relays	Select when QIV operation or higher noise immunity is needed, accepting slightly higher gate drive requirement

Compared with BTA08-600BWRG, the T810T-6I reduces system-level BOM count via snubber elimination and direct MCU drive; compared with T825T-6I, it trades QIV capability for lower gate drive, optimizing for cost-sensitive, unidirectional motor control.

Availability

T810T-6I is available at Aetrix Electronics and suitable for motor control in power tools, dimmable lighting systems, and small-appliance heater switching requiring stable component supply, long-term lifecycle support, and UL-certified reliability.

Supply support for T810T-6I 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, delivering power, analog, MEMS, and microcontroller solutions across automotive, industrial, and consumer markets.

The T8T series belongs to ST's high-reliability AC power switching portfolio, engineered specifically for value-sensitive, thermally constrained AC load control in white goods, power tools, and lighting - emphasizing snubberless operation, logic-level drive, and safety-rated isolation.

FAQ

What is the maximum junction temperature and how does it affect continuous current rating?

The T810T-6I has an operating junction temperature range of –40 °C to +125 °C. At T_j = 125 °C, its on-state voltage drops to 0.87 V (V_TO) and dynamic resistance remains ≤60 mΩ, enabling 8 A RMS conduction only if case temperature is maintained at ≤97 °C via heatsinking. Derating applies linearly above 97 °C case temperature.

Does the T810T-6I require a heat sink in all applications?

A heatsink is required to sustain 8 A RMS operation: R_th(j-c) = 2.8 °C/W implies ~22 °C temperature rise at 8 A (P ≈ 1.6 V × 8 A = 12.8 W → ΔT = 12.8 W × 2.8 °C/W ≈ 36 °C). For intermittent loads <2 A RMS or short duty cycles, natural convection may suffice - verified via thermal simulation using Figure 1 and Figure 3 from the datasheet.

Can the T810T-6I be used in zero-crossing switched applications?

Yes - its 10 mA I_GT and 1.3 V V_GT allow reliable triggering at zero-crossing points when driven by optocoupled zero-crossing detectors (e.g., MOC3041). However, it is not a zero-crossing triac itself; external timing control is required to avoid turn-on at high dv/dt points.

Is the TO-220AB insulated package compatible with standard TO-220 heatsinks?

Yes - the TO-220AB insulated package uses the same mechanical footprint and mounting hole pattern as standard TO-220AB, but incorporates internal insulation between the metal tab and die. Standard aluminum heatsinks can be used directly; no insulating washer is needed unless additional creepage is mandated by end-equipment safety standards.

T810T-6I Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Triac Type:: Logic - Sensitive Gate

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):: 60A, 63A

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:: Through Hole

Supplier Device Package:: TO-220AB Insulated

T810T-6I FAQ

1.How can I place an order for T810T-6I through Aetrix?

Please submit a Request for Quotation (RFQ) for T810T-6I 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-6I reliable?

The price and inventory of T810T-6I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T810T-6I is usually 5 days.

3.What payment methods are accepted for T810T-6I?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T810T-6I transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T810T-6I?

T810T-6I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T810T-6I 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-6I?

For technical support, including T810T-6I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T810T-6I requirements.

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

All T810T-6I 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-6I meets industry standards.

7.What is the process for return or replacement of T810T-6I?

All T810T-6I units undergo pre-shipment inspection (PSI). If there is an issue with T810T-6I, 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-6I part is unused and in its original packaging.

Return procedure for T810T-6I:

1.Submit a request within 90 days.

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

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