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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTB08-600SWRG

Name: BTB08-600SWRG
Brand: STMicroelectronics
SKU: BTB08-600SWRG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BTB08-600SWRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTB08-600SWRG.pdf

Description:: TRIAC SENS GATE 600V 8A TO220

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Product details

Overview

BTB08-600SWRG from STMicroelectronics is a snubberless, logic-level triac designed for AC mains switching in phase-control and zero-crossing applications. It delivers 8 A RMS on-state current, 600 V repetitive peak off-state voltage (VDRM/VRRM), and 10 mA maximum gate trigger current (IGT) - enabling direct drive from microcontrollers without external amplification. It is used in light dimmers, motor speed controllers, and heating regulation circuits where high commutation performance on inductive loads is required.

For engineers reviewing the BTB08-600SWRG datasheet, BTB08-600SWRG pinout, BTB08-600SWRG application, or BTB08-600SWRG equivalent, key selection criteria include its snubberless operation with dV/dt immunity up to 400 V/µs, low IGT for MCU compatibility, TO-220AB package thermal resistance (Rth(j-c) = 1.6 °C/W), and validated use in inductive load switching without external snubbers.

Technical Context

This triac operates in three quadrants (I, II, III) and features enhanced commutation robustness for inductive loads, eliminating need for external snubber networks. Its logic-level gate sensitivity (IGT ≤ 10 mA at 12 V) allows direct interfacing with 3.3 V/5 V microcontroller GPIOs, while its 400 V/µs dV/dt rating ensures reliable turn-off under fast transient conditions.

The device supports full-cycle AC conduction with 8 A RMS current handling at Tc = 110 °C and exhibits low on-state voltage (VTM ≤ 1.55 V at 11 A, 25 °C) and dynamic resistance (RD ≤ 50 mΩ at 125 °C), minimizing power loss and thermal stress in compact designs.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	8 A - Sustains continuous AC load current in heating, motor control, and lighting applications without derating at Tc ≤ 110 °C.
VDRM / VRRM	600 V - Withstands peak line voltages up to 424 V RMS (e.g., 240 VAC systems) with margin for transients.
IGT (max)	10 mA - Enables direct drive from low-power MCUs (e.g., STM32, ESP32) without gate driver ICs or discrete transistors.
dV/dt (min)	400 V/µs - Guarantees reliable commutation on inductive loads (e.g., solenoids, fan motors) without snubber components.
Rth(j-c)	1.6 °C/W - Supports efficient heat transfer to heatsink; enables 8 A operation with modest thermal interface (e.g., 10 K/W heatsink + thermal paste).
VTM	≤1.55 V @ 11 A - Limits conduction loss to <17 W at full current, reducing thermal design burden vs. higher-VTM alternatives.
dl/dt (crit)	50 A/µs - Ensures robust turn-on under high di/dt conditions (e.g., transformer inrush, capacitor charging).

Pinout & Package

BTB08-600SWRG uses the TO-220AB package - a non-insulated, through-hole power package with 3 leads and integral metal tab for mechanical mounting and thermal dissipation. The tab is electrically connected to MT2 (A2) terminal.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	Reference terminal for gate triggering; connects to load return or neutral side in AC switching topologies.
A2 (MT2)	Main Terminal 2	High-side AC line connection; electrically tied to metal tab - requires isolation from heatsink if floating potential is needed.
G	Gate	Logic-level control input; triggers conduction when voltage ≥ VGT (≤1.2 V) and current ≥ IGT (≤10 mA) applied between G and A1.

Key Features

Feature	Design Value
Snubberless operation	Validated dV/dt immunity of 400 V/µs eliminates need for RC snubber networks on inductive loads - reducing BOM count and PCB area.
Logic-level gate drive	Max 10 mA IGT enables direct interface with 3.3 V/5 V microcontrollers - no level-shifting or gate driver IC required.
Three-quadrant operation	Operates in quadrants I, II, and III only - suppresses false triggering in noisy environments and improves EMI robustness vs. 4Q triacs.
High commutation performance	(dl/dt)c ≥ 5.4 A/ms at 0.1 V/µs dV/dt - ensures reliable turn-off during current zero-crossing in phase-control dimming and motor control.
Halogen-free ECOPACK2	Meets RoHS and REACH requirements; TO-220AB lead finish is lead-free and compliant with UL94 V0 flammability standard.

Applications

Light Dimming

Induction Motor Control

Use Scenario: Phase-angle controlled dimming of incandescent and halogen lamps in residential and commercial lighting systems.

IC Role / Device Role / Timing Role: Main AC power switch; triggered at programmable phase angle relative to AC zero-crossing to regulate RMS voltage delivered to lamp.

Use Value: Eliminates snubber components due to 400 V/µs dV/dt rating, reducing system cost and improving reliability in space-constrained wall-mounted dimmers.

Use Scenario: Soft-start and speed regulation of single-phase induction motors in fans, pumps, and HVAC blowers.

IC Role / Device Role / Timing Role: Bidirectional AC switch controlling power delivery to motor windings; synchronized to zero-crossing for EMI reduction.

Use Value: Snubberless operation prevents false turn-on during motor back-EMF transients, ensuring stable speed control without added protection circuitry.

Heating Regulation

Static Relay Replacement

Use Scenario: Duty-cycle or phase-control based temperature regulation in resistive heating elements (ovens, soldering irons, industrial heaters).

IC Role / Device Role / Timing Role: High-reliability AC power switch replacing electromechanical relays; driven by MCU PWM or phase-triggered logic.

Use Value: 8 A RMS rating and 1.6 °C/W Rth(j-c) allow solid-state switching of 1.8 kW loads at 230 VAC with minimal heatsinking.

Use Scenario: Solid-state replacement for electro-mechanical relays in PLC output modules, building automation, and test equipment.

IC Role / Device Role / Timing Role: Fail-safe AC load switch with galvanic isolation provided externally; gate driven by optocoupler or isolated driver.

Use Value: Logic-level IGT (≤10 mA) simplifies isolation interface design, while TO-220AB package enables drop-in replacement of legacy relay drivers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTA08-600SWRG	Insulated TO-220AB package (2500 VRMS isolation); identical electrical specs (8 A, 600 V, 10 mA IGT, 400 V/µs dV/dt).	Required where MT2 isolation from heatsink is mandatory (e.g., floating ground systems, medical devices).	Select when creepage/clearance or safety certification (UL/IEC) demands insulated mounting - adds ~$0.15 cost and 0.5 mm height.
T810-600B	DPAK surface-mount package; same 8 A/600 V rating but lower IGT (10 mA) and reduced thermal capability (Rth(j-c) = 2.5 °C/W).	Suitable for space-constrained, lower-power (<5 A continuous) PCB-mounted controls without heatsinks.	Choose for automated assembly and compact designs where thermal budget permits - not interchangeable mechanically or thermally with BTB08-600SWRG.

Compared with BTA08-600SWRG, BTB08-600SWRG offers lower-cost non-insulated mounting but requires heatsink isolation; versus T810-600B, it provides superior thermal performance and through-hole reliability at the expense of SMT compatibility.

Availability

BTB08-600SWRG is available at Aetrix Electronics and suitable for light dimming, motor speed control, heating regulation, and static relay replacement requiring stable component supply across industrial, appliance, and building automation programs.

Supply support for BTB08-600SWRG 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

BTB08-600SWRG belongs to ST's high-performance snubberless triac product line, engineered specifically for robust, low-component-count AC control in cost-sensitive and thermally constrained applications.

FAQ

Is BTB08-600SWRG compatible with 3.3 V microcontrollers?

Yes. Its maximum gate trigger current is 10 mA at 12 V, and typical VGT is ≤1.2 V - meaning a 3.3 V GPIO can deliver sufficient gate voltage and current (≥10 mA into ~330 Ω) to ensure reliable turn-on across temperature and process variation. No level shifter is required.

Does BTB08-600SWRG require a heatsink in all applications?

A heatsink is required for continuous 8 A RMS operation. At Tc = 110 °C, junction temperature remains within spec (125 °C max) with Rth(j-c) = 1.6 °C/W and a heatsink + interface resistance ≤ 1.9 °C/W. For intermittent loads <3 A, board copper may suffice per Figure 3 in DS2114.

Can BTB08-600SWRG replace a standard 4-quadrant triac like BT136?

No - BTB08-600SWRG is a 3-quadrant device (I/II/III only). It cannot be triggered in quadrant IV, which eliminates false triggering but also precludes certain legacy zero-crossing driver topologies relying on Q4 conduction. Verify gate drive polarity and quadrant support before substitution.

What is the maximum safe operating voltage for BTB08-600SWRG in 230 VAC systems?

Its 600 V VDRM/VRRM rating supports peak line voltage of 325 V (230 V × √2) with 85 V margin - sufficient for most 230 VAC mains with typical surges (e.g., IEC 61000-4-5 Level 3: ±2 kV). For 277 VAC or high-surge environments, consider 800 V variants like BTB08-800SWRG.

BTB08-600SWRG 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

BTB08-600SWRG FAQ

1.How can I place an order for BTB08-600SWRG through Aetrix?

Please submit a Request for Quotation (RFQ) for BTB08-600SWRG 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 BTB08-600SWRG reliable?

The price and inventory of BTB08-600SWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTB08-600SWRG is usually 5 days.

3.What payment methods are accepted for BTB08-600SWRG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTB08-600SWRG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTB08-600SWRG?

BTB08-600SWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTB08-600SWRG 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 BTB08-600SWRG?

For technical support, including BTB08-600SWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTB08-600SWRG requirements.

6.How does Aetrix verify that BTB08-600SWRG is sourced from the original manufacturer or authorized distributors?

All BTB08-600SWRG 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 BTB08-600SWRG meets industry standards.

7.What is the process for return or replacement of BTB08-600SWRG?

All BTB08-600SWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTB08-600SWRG, 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 BTB08-600SWRG part is unused and in its original packaging.

Return procedure for BTB08-600SWRG:

1.Submit a request within 90 days.

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

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