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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTA08-600SWRG

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

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Part No.:: BTA08-600SWRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTA08-600SWRG.pdf

Description:: TRIAC SENS GATE 600V 8A TO220

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Product details

Overview

BTA08-600SWRG from STMicroelectronics is a snubberless, logic-level 8 A, 600 V triac in insulated TO-220AB package, designed for AC mains switching in inductive load applications. It features 10 mA maximum gate trigger current (IGT), 400 V/µs dV/dt immunity at 125 °C, and 2500 VRMS voltage-isolated tab compliant with UL E81734. It is used in motor speed controllers and heating regulation circuits requiring robust commutation performance.

For engineers reviewing the BTA08-600SWRG datasheet, BTA08-600SWRG pinout, BTA08-600SWRG application, or BTA08-600SWRG equivalent, key selection criteria include snubberless operation on inductive loads, low IGT compatibility with microcontroller GPIOs, insulated mounting for safety-critical AC interfaces, and thermal resistance of 2.5 °C/W (junction-to-case).

Technical Context

This triac operates in three quadrants (I, II, III) with logic-level sensitivity (IGT ≤ 10 mA), enabling direct drive from 3.3 V or 5 V microcontrollers without external amplification. Its snubberless architecture delivers high commutation robustness-verified by (dV/dt)c ≥ 40 V/µs and (dl/dt)c ≥ 4.5 A/ms at 125 °C-making it suitable for unbuffered inductive switching.

It integrates an internal ceramic insulating pad rated for 2500 VRMS isolation between the MT1/MT2 terminals and the metal tab, satisfying reinforced insulation requirements per UL standards. The device supports full-cycle sinusoidal RMS current up to 8 A at Tc = 100 °C, with on-state voltage drop limited to 1.55 V (ITM = 11 A, Tj = 25 °C) and dynamic resistance ≤ 50 mΩ at 125 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	8 A - Sustained AC load current capability at Tc = 100 °C, enabling use in 1 kW+ resistive or inductive AC loads.
VDRM / VRRM	600 V - Peak repetitive off-state voltage rating, supporting 230 VAC mains with ≥2× safety margin.
IGT (max)	10 mA - Maximum gate trigger current required at 12 V, ensuring reliable turn-on from MCU GPIOs or low-power drivers.
dV/dt (min)	400 V/µs - Critical rate of rise of off-state voltage at Tj = 125 °C, eliminating need for external snubber on inductive loads.
Rth(j–c)	2.5 °C/W - Junction-to-case thermal resistance, defining heatsink sizing requirement for 8 A continuous conduction.
VTM (max)	1.55 V - On-state voltage at 11 A pulse, directly determining conduction loss (P ≈ 1.55 V × IT(RMS)) and thermal design.
Isolation Rating	2500 VRMS - Reinforced insulation between power terminals and tab, meeting UL E81734 for safe chassis-mounting in Class I equipment.

Pinout & Package

Package: Insulated TO-220AB - thermally conductive metal tab electrically isolated at 2500 VRMS; requires mechanical mounting to heatsink without electrical connection.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	Reference terminal for gate triggering; connected to neutral or low-side AC line in phase-control topologies.
A2 (MT2)	Main Terminal 2	High-current AC output path; carries full load current and defines polarity reference for gate control.
G	Gate	Low-power control input; triggers conduction when IGT ≥ 10 mA (max) with appropriate polarity relative to A1/A2.

Key Features

Feature	Design Value
Snubberless commutation	Validated (dV/dt)c ≥ 40 V/µs and (dl/dt)c ≥ 4.5 A/ms at 125 °C-enables direct drive of motors, solenoids, and transformers without RC snubbers.
Logic-level gate drive	IGT ≤ 10 mA at 12 V ensures compatibility with 3.3 V/5 V MCUs (e.g., STM32, PIC, ESP32) without buffer transistors.
UL-certified isolation	2500 VRMS reinforced insulation (UL file E81734) allows safe mounting to grounded heatsinks in AC mains-connected equipment.
Three-quadrant operation	Triggers only in quadrants I, II, and III-reduces false triggering from noise and improves EMI immunity vs. 4Q triacs.
ECOPACK2 compliance	Halogen-free epoxy, lead-free plating, and RoHS/REACH compliance support environmentally regulated industrial and consumer designs.

Applications

Motor Speed Control

Heating Regulation

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

IC Role / Device Role / Timing Role: Main AC power switch triggered synchronously with zero-crossing detection to modulate RMS voltage delivered to motor windings.

Use Value: Snubberless operation eliminates external RC networks, reducing BOM count and PCB area while maintaining stable commutation under motor inductance.

Use Scenario: Precise temperature maintenance in electric ovens, water heaters, and HVAC duct heaters via duty-cycle or phase-control modulation.

IC Role / Device Role / Timing Role: High-reliability AC mains switch enabling proportional power delivery based on PID feedback from NTC/RTD sensors.

Use Value: 8 A RMS rating and 2500 VRMS isolation allow direct integration into Class I appliance designs without auxiliary isolation barriers.

Static Relay Replacement

Light Dimmer Systems

Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules and industrial control panels handling 230 VAC loads.

IC Role / Device Role / Timing Role: Fail-safe ON/OFF switching element controlled by optocoupled logic signals, providing silent, bounce-free, long-life operation.

Use Value: Logic-level gate enables direct coupling to standard 5 V optocoupler outputs (e.g., MOC3021), simplifying driver stage design.

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

IC Role / Device Role / Timing Role: Phase-controlled AC switch synchronized to line zero-crossing, adjusting conduction angle to regulate lamp brightness.

Use Value: 400 V/µs dV/dt immunity prevents false triggering from line transients, ensuring flicker-free dimming even on noisy mains.

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
BTA08-600TW	5 mA max IGT (vs. 10 mA), tighter gate sensitivity; otherwise identical voltage/current/isolation specs.	Better suited for ultra-low-power gate drivers (e.g., battery-powered controllers), but higher cost and lower availability.	Select when gate drive capability is marginal (< 5 mA available); otherwise BTA08-600SWRG offers optimal balance of drive margin and stock availability.
T835-600H	IPAK package (vs. insulated TO-220AB), 35 mA IGT, 400 V/µs dV/dt, no integrated isolation-requires external insulator.	Higher power density and surface-mount assembly, but mandates additional creepage/clearance design and heatsink isolation.	Choose for space-constrained SMT designs where board-level isolation can be engineered; avoid if chassis-mount safety certification is required.

Compared with BTA08-600TW, BTA08-600SWRG provides greater gate drive margin (10 mA vs. 5 mA) for robustness across voltage/temp variations, while versus T835-600H it delivers certified isolation and through-hole reliability at the cost of larger footprint-making it preferred for safety-critical, medium-volume industrial AC controls.

Availability

BTA08-600SWRG is available at Aetrix Electronics and suitable for motor speed control, heating regulation, static relay replacement, and light dimmer systems requiring stable component supply, safety-certified isolation, and snubberless inductive load switching.

Supply support for BTA08-600SWRG 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, specializing in power management, analog, microcontrollers, and automotive ICs.

The BTA series belongs to ST's high-reliability AC power switching portfolio, engineered specifically for snubberless, logic-compatible triac operation in industrial, appliance, and building automation systems demanding UL-certified isolation and inductive load resilience.

FAQ

What is the maximum junction temperature for continuous operation?

The BTA08-600SWRG 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-achieved via heatsinking to maintain Tc ≤ 100 °C (per IT(RMS) = 8 A rating) and accounting for Rth(j–c) = 2.5 °C/W.

Does this triac require a heat sink in all applications?

Yes-due to its 8 A RMS rating and 2.5 °C/W junction-to-case thermal resistance, a heatsink is mandatory for any application drawing >1 A RMS continuously. Without heatsinking, power dissipation causes rapid junction temperature rise beyond 125 °C, risking thermal runaway and failure.

Can BTA08-600SWRG replace a standard 4-quadrant triac like BT136?

No-it is a 3-quadrant snubberless logic-level triac with different triggering behavior and higher dV/dt immunity. Replacing a 4Q triac requires verifying gate drive polarity compatibility, absence of quadrant IV triggering in the circuit, and validation of commutation margins under the specific load profile.

Is the insulated tab rated for functional or reinforced insulation?

The 2500 VRMS isolation rating meets UL's reinforced insulation requirements (file E81734), meaning it provides double protection against electric shock and may be used between hazardous live parts and accessible conductive surfaces without additional insulation layers.

BTA08-600SWRG 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):: 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-220

BTA08-600SWRG FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your BTA08-600SWRG 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 BTA08-600SWRG?

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

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

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

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

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

Return procedure for BTA08-600SWRG:

1.Submit a request within 90 days.

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

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