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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTA08-600TWRG

Name: BTA08-600TWRG
Brand: STMicroelectronics
SKU: BTA08-600TWRG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BTA08-600TWRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTA08-600TWRG.pdf

Description:: TRIAC SENS GATE 600V 8A TO220

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Product details

Overview

BTA08-600TWRG from STMicroelectronics is a snubberless, logic-level triac designed for AC mains switching in inductive and resistive loads. It delivers 8 A RMS on-state current, 600 V repetitive peak off-state voltage (VDRM/VRRM), and ultra-low 5 mA maximum gate trigger current (IGT) - enabling direct drive from microcontrollers without external amplification. It is used in motor speed controllers, light dimmers, and heating regulation circuits requiring high commutation robustness.

For engineers reviewing the BTA08-600TWRG datasheet, BTA08-600TWRG pinout, BTA08-600TWRG application, or BTA08-600TWRG equivalent, this page provides verified technical context, package-specific thermal and electrical specifications, real-world use scenarios, and validated alternative triacs for inductive load switching with logic-level gate compatibility.

Technical Context

This triac operates in three quadrants (I, II, III) and features snubberless commutation capability, allowing reliable turn-off under inductive loads without external RC snubbers. Its 5 mA max IGT and 1.2 V max VGT ensure compatibility with 3.3 V/5 V GPIOs, while its 400 V/µs dV/dt immunity at 125 °C prevents false triggering in noisy industrial environments.

The device uses an insulated TO-220AB package rated for 2500 VRMS isolation between tab and terminals, meeting UL E81734. Thermal resistance junction-to-case is 2.5 °C/W, supporting 8 A RMS operation at Tc = 100 °C with appropriate heatsinking.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	8 A - Sustains continuous AC load current up to 8 A RMS at Tc = 100 °C with heatsink.
VDRM / VRRM	600 V - Blocks 600 V peak AC line voltage in both directions, suitable for 230 VAC mains.
IGT (max)	5 mA - Gate triggers reliably with ≤5 mA DC current, enabling direct MCU GPIO drive.
dV/dt (min)	400 V/µs - Immune to rapid voltage transients at 125 °C, eliminating need for snubber on inductive loads.
Rth(j-c)	2.5 °C/W - Junction-to-case thermal resistance enables efficient heat transfer to heatsink.
VTM (max)	1.55 V - On-state voltage drop at 11 A pulse ensures low conduction loss and minimal self-heating.
(dl/dt)c (min)	4.5 A/ms - Critical rate of current decrease supports clean commutation in motor control waveforms.

Pinout & Package

Package: TO-220AB Insulated - thermally conductive but electrically isolated metal tab (2500 VRMS isolation, UL E81734 certified). Mounting torque: 0.55 N·m (max 0.70 N·m).

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	Reference terminal for gate triggering; connected to neutral or low-side AC return path.
A2 (MT2)	Main Terminal 2	High-side AC load connection; carries full load current and defines polarity reference for gate.
G	Gate	Control input; triggers conduction when referenced to A1; sensitive to ≤5 mA DC for logic-level drive.

Key Features

Feature	Design Value
Snubberless commutation	Guaranteed turn-off under inductive loads (e.g., motors, solenoids) without external RC network.
Logic-level gate sensitivity	5 mA max IGT allows direct interface with 3.3 V/5 V microcontrollers - no buffer stage required.
UL-certified insulation	2500 VRMS isolation between tab and terminals satisfies safety requirements for Class I appliances.
High dV/dt immunity	400 V/µs minimum at 125 °C prevents false triggering in EMI-heavy industrial AC environments.
Three-quadrant operation	Triggers only in quadrants I, II, III - eliminates unwanted quadrant IV conduction in phase-control applications.

Applications

Motor Speed Control

Light Dimming

Use Scenario: Variable-speed control of single-phase induction motors in fans, pumps, and compressors.

IC Role / Device Role / Timing Role: AC power switch performing phase-angle control via zero-crossing synchronized gate pulses.

Use Value: Enables smooth speed regulation with 8 A RMS handling and snubberless operation on highly inductive motor windings.

Use Scenario: Mains-powered residential/commercial LED or incandescent lamp dimming.

IC Role / Device Role / Timing Role: Bidirectional AC switch triggered at adjustable phase angle to reduce RMS output voltage.

Use Value: Delivers flicker-free dimming with 5 mA gate drive compatibility and 600 V blocking for universal 230 VAC input.

Heating Regulation

Static Relay Replacement

Use Scenario: Solid-state temperature control in ovens, soldering irons, and industrial heaters.

IC Role / Device Role / Timing Role: ON/OFF power switch modulating heater duty cycle via burst-fire or phase-control.

Use Value: Supports 8 A resistive load current with low VTM (1.55 V) to minimize conduction loss and thermal stress.

Use Scenario: Electromechanical relay replacement in PLC I/O modules and building automation systems.

IC Role / Device Role / Timing Role: Fail-safe AC load switch with galvanic isolation and zero-crossing switching capability.

Use Value: Provides silent, bounce-free switching with 2500 VRMS insulated tab for reinforced safety compliance.

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
BTA08-600SWRG	10 mA max IGT (vs. 5 mA); same package, voltage, and snubberless rating.	Suitable where MCU GPIO drive strength exceeds 5 mA but logic-level compatibility still required.	Select if higher gate margin is preferred without sacrificing snubberless performance or isolation.
T835-600H	IPAK package (non-insulated), 35 mA IGT, 8 A/600 V, snubberless - no UL-rated isolation.	Used in space-constrained PCBs where heatsinking is via board copper, not isolated mounting hardware.	Choose for compact surface-mount designs where 2500 VRMS tab isolation is not mandated by safety standards.

Compared with BTA08-600TWRG, BTA08-600SWRG offers relaxed gate drive margin while retaining identical isolation and snubberless behavior; T835-600H trades tab insulation for smaller footprint and lower profile, but requires careful creepage/clearance design due to non-isolated tab.

Availability

BTA08-600TWRG is available at Aetrix Electronics and suitable for motor speed control, light dimming, heating regulation, and static relay replacement requiring stable component supply across industrial and appliance OEM programs.

Supply support for BTA08-600TWRG 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 BTA series belongs to ST's high-reliability snubberless triac product line, engineered specifically for robust AC switching in inductive-load applications where safety isolation and logic-level gate drive are mandatory.

FAQ

What is the maximum junction temperature for continuous operation?

The BTA08-600TWRG has an operating junction temperature range of –40 °C to +125 °C. Continuous operation at 125 °C requires thermal design ensuring junction temperature does not exceed this limit - verified using Rth(j-c) = 2.5 °C/W and measured case temperature under worst-case load conditions.

Can this triac replace a mechanical relay in a 230 VAC, 6 A resistive load?

Yes - with proper heatsinking and gate drive circuitry, BTA08-600TWRG supports 8 A RMS at Tc = 100 °C and blocks 600 V peak, making it suitable for 230 VAC (325 V peak) resistive loads up to 6 A. Its snubberless design and 2500 VRMS insulated tab meet key safety and reliability requirements for solid-state relay replacement.

Is a heatsink required for 8 A RMS operation?

Yes - at 8 A RMS, power dissipation reaches ~12.5 W (based on VTM ≈ 1.55 V and RD ≈ 50 mΩ). With Rth(j-c) = 2.5 °C/W, a heatsink must maintain case temperature ≤100 °C to keep junction ≤125 °C. Ambient temperature, airflow, and PCB copper area all impact required heatsink size.

Does the insulated tab require electrical connection to circuit ground?

No - the insulated tab is electrically isolated (2500 VRMS) and serves only as a thermal path. It may be mounted directly to a grounded heatsink without creating a short. However, mechanical mounting must avoid damaging the insulation layer, and torque must not exceed 0.70 N·m per ST specification.

BTA08-600TWRG 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):: 80A, 84A

Current - Gate Trigger (Igt) (Max):: 5 mA

Current - Hold (Ih) (Max):: 10 mA

Configuration:: Single

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

BTA08-600TWRG FAQ

1.How can I place an order for BTA08-600TWRG through Aetrix?

Please submit a Request for Quotation (RFQ) for BTA08-600TWRG 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 BTA08-600TWRG reliable?

The price and inventory of BTA08-600TWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA08-600TWRG is usually 5 days.

3.What payment methods are accepted for BTA08-600TWRG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA08-600TWRG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTA08-600TWRG?

BTA08-600TWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTA08-600TWRG 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 BTA08-600TWRG?

For technical support, including BTA08-600TWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA08-600TWRG requirements.

6.How does Aetrix verify that BTA08-600TWRG is sourced from the original manufacturer or authorized distributors?

All BTA08-600TWRG 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 BTA08-600TWRG meets industry standards.

7.What is the process for return or replacement of BTA08-600TWRG?

All BTA08-600TWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA08-600TWRG, 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 BTA08-600TWRG part is unused and in its original packaging.

Return procedure for BTA08-600TWRG:

1.Submit a request within 90 days.

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

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