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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTB08-600BRG

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

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Part No.:: BTB08-600BRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTB08-600BRG.pdf

Description:: TRIAC 600V 8A TO220

Quantity:: RFQ Add To RFQ list

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Inventory:1,138

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Product details

Overview

BTB08-600BRG from STMicroelectronics is an 8 A, 600 V snubberless triac in TO-220AB package, designed for AC phase control and ON/OFF switching in inductive loads. It features 50 mA maximum gate trigger current (IGT), 400 V/µs critical dV/dt, and 50 A/µs critical dl/dt-enabling reliable commutation in motor speed controllers and heating regulation circuits.

For engineers reviewing the BTB08-600BRG datasheet, BTB08-600BRG pinout, BTB08-600BRG application, or BTB08-600BRG equivalent, key selection criteria include snubberless operation on inductive loads, TO-220AB thermal performance (Rth(j-c) = 1.6 °C/W), and compatibility with microcontroller-level gate drive without external amplification.

Technical Context

This triac operates in three quadrants (I, II, III) with snubberless commutation capability, enabling direct switching of inductive AC loads without external snubber networks. Its 400 V/µs dV/dt rating and 5.4 A/ms (dV/dt)c = 0.1 V/µs ensure robust turn-off under high-reactance conditions.

The device uses standard silicon-based thyristor structure with optimized gate sensitivity (IGT ≤ 50 mA) and low on-state voltage (VTM ≤ 1.55 V at 11 A), supporting efficient power handling up to 8 A RMS at Tc = 110 °C with junction temperature range from –40 °C to +125 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	8 A RMS - supports continuous AC load current up to 8 A at case temperature 110 °C
VDRM / VRRM	600 V - peak repetitive off-state voltage rating ensures safe blocking in 230 VAC mains applications
IGT (max)	50 mA - gate trigger current compatible with direct microcontroller GPIO drive (no buffer required)
dV/dt (min)	400 V/µs - enables reliable commutation on inductive loads without snubber circuitry
Rth(j-c)	1.6 °C/W - low thermal resistance allows effective heat transfer to heatsink in TO-220AB package
VTM (max)	1.55 V at 11 A - low conduction loss reduces power dissipation and thermal stress
ITSM (50 Hz)	80 A - non-repetitive surge rating supports motor startup inrush currents

Pinout & Package

BTB08-600BRG is housed in a TO-220AB package (non-insulated tab), with three terminals: A1 (MT1), A2 (MT2), and G (Gate). The tab is electrically connected to A2 and requires isolation from heatsink unless referenced to A2 potential.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	AC load return path; referenced to gate for triggering in quadrants I, II, III
A2 (MT2)	Main Terminal 2	AC line input or load connection; electrically tied to metal tab in TO-220AB
G	Gate	Control input for bidirectional conduction initiation; triggers at ≤50 mA pulse

Key Features

Feature	Design Value
Snubberless operation	Enables direct switching of inductive loads (e.g., motors, solenoids) without external RC snubbers
Logic-level gate drive	IGT ≤ 50 mA allows direct interface with 3.3 V/5 V microcontrollers without gate driver ICs
High commutation performance	(dV/dt)c ≥ 400 V/µs ensures stable turn-off under fast voltage transients on inductive loads
TO-220AB thermal efficiency	Rth(j-c) = 1.6 °C/W supports 8 A RMS operation with modest heatsinking at Tc = 110 °C

Applications

Motor Speed Control

Heating Regulation

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

IC Role / Device Role / Timing Role: Bidirectional AC switch performing phase-angle control to adjust RMS voltage delivered to motor windings.

Use Value: Eliminates need for mechanical speed controls and external snubbers, reducing BOM count and improving reliability in HVAC systems.

Use Scenario: Precise temperature maintenance in industrial ovens, soldering irons, and plastic extruders.

IC Role / Device Role / Timing Role: ON/OFF or phase-control switch regulating power to resistive heating elements via zero-cross or phase-triggered firing.

Use Value: Snubberless design prevents false triggering during thermal cycling, ensuring stable duty-cycle control over long service life.

Light Dimming

Static Relay Replacement

Use Scenario: Mains-powered LED or incandescent lamp dimming in residential and commercial lighting systems.

IC Role / Device Role / Timing Role: Phase-controlled AC switch modulating conduction angle per half-cycle to vary light intensity.

Use Value: 600 V VDRM rating provides margin for 230 VAC ±10 % operation; logic-level gate simplifies integration with touch or DALI controllers.

Use Scenario: Solid-state replacement of electromechanical relays in PLC output modules and building automation panels.

IC Role / Device Role / Timing Role: High-reliability AC load switch providing silent, bounce-free, and arc-free switching of lamps, solenoids, and small motors.

Use Value: 80 A ITSM surge rating handles relay-coil inrush; TO-220AB package enables direct PCB mounting with screw-terminal heatsink attachment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTA08-600BW	Insulated TO-220AB package (2500 VRMS isolation); identical electrical specs	Required where A2 tab must be isolated from heatsink (e.g., floating ground systems)	Select when safety isolation between heatsink and circuit ground is mandated by regulatory standards
T835-600B	DPAK package (Rth(j-c) = 2.5 °C/W); 35 mA IGT; lower IT(RMS) derating above 75 °C	Suitable for space-constrained SMT designs but requires higher gate drive and tighter thermal management	Select for surface-mount assembly where board space is limited and heatsink interface is planar

Compared with BTB08-600BRG, BTA08-600BW adds voltage insulation at the cost of slightly higher thermal resistance, while T835-600B trades package convenience and gate sensitivity for reduced thermal performance and lower surge capability-making BTB08-600BRG optimal for through-hole, non-isolated, high-reliability AC switching.

Availability

BTB08-600BRG is available at Aetrix Electronics and suitable for motor speed control, heating regulation, light dimming, and static relay replacement requiring stable component supply across industrial OEM production cycles.

Supply support for BTB08-600BRG 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 discrete devices, analog ICs, and microcontrollers for industrial, automotive, and consumer markets.

BTB08-600BRG belongs to ST's snubberless triac product line, engineered specifically for robust AC switching in inductive-load applications where reliability, simplicity, and thermal efficiency are critical.

FAQ

What is the maximum junction temperature for BTB08-600BRG?

The maximum operating junction temperature is +125 °C, with storage temperature ranging from –40 °C to +150 °C. Derating curves in Figure 2 show that RMS current must be reduced linearly above Tc = 110 °C to maintain safe junction temperature under continuous operation.

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

Yes-due to its 8 A RMS rating and 1.6 °C/W junction-to-case thermal resistance, a heatsink is mandatory for sustained operation above ~2 A RMS at ambient temperatures >40 °C. Thermal simulation using Rth(j-a) = 60 °C/W (TO-220AB) confirms overheating risk without heatsink at full rated current.

Can BTB08-600BRG be used with zero-crossing control?

No-it is not optimized for zero-crossing operation. As a standard snubberless triac, it lacks integrated zero-cross detection circuitry; external zero-cross sensing (e.g., optocoupler + MCU) is required if zero-cross switching is needed to reduce EMI and inrush stress.

Is the TO-220AB tab electrically isolated in BTB08-600BRG?

No-the tab is internally connected to A2 (MT2) and is not insulated. Electrical isolation from the heatsink must be implemented externally using mica washers or insulating pads if A2 is not at heatsink potential, unlike the insulated BTA08-600BW variant.

BTB08-600BRG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Triac Type:: Standard

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):: 50 mA

Current - Hold (Ih) (Max):: 50 mA

Configuration:: Single

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

BTB08-600BRG FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your BTB08-600BRG 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 BTB08-600BRG?

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

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

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

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

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

Return procedure for BTB08-600BRG:

1.Submit a request within 90 days.

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

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