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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTB08-600TWRG

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

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Part No.:: BTB08-600TWRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTB08-600TWRG.pdf

Description:: TRIAC SENS GATE 600V 8A TO220

Quantity:: RFQ Add To RFQ list

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Inventory:4,910

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Product details

Overview

BTB08-600TWRG from STMicroelectronics is a snubberless, logic-level triac designed for AC switching in inductive load applications. 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 static relays requiring high commutation robustness.

For engineers reviewing the BTB08-600TWRG datasheet, BTB08-600TWRG pinout, BTB08-600TWRG application, or BTB08-600TWRG equivalent, key selection criteria include its 5 mA IGT, 400 V/µs dV/dt immunity at 125 °C, 50 A non-repetitive surge rating, insulated TO-220AB package option, and verified snubberless operation on inductive loads.

Technical Context

This triac operates in three quadrants (I, II, III) with logic-level sensitivity and snubberless commutation capability. Its 5 mA max IGT and 1.2 V max VGT allow direct interfacing with 3.3 V/5 V MCUs, while its 400 V/µs dV/dt rating (at Tj = 125 °C) ensures reliable turn-off under inductive transients without external snubbers.

The device features a low 1.55 V max on-state voltage (VTM) at 11 A and 50 mΩ dynamic resistance (RD), minimizing conduction loss. Thermal resistance is 1.6 °C/W (junction-to-case, AC), supporting stable 8 A RMS operation at Tc = 110 °C in TO-220AB packages.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	8 A - Sustains continuous AC load current up to 8 A at Tc = 110 °C
VDRM / VRRM	600 V - Blocks 600 V peak AC voltage in both directions during off-state
IGT (max)	5 mA - Enables direct MCU GPIO drive without gate driver stage
dV/dt (min)	400 V/µs - Resists false triggering from rapid voltage transients on inductive loads
ITSM (50 Hz)	80 A - Withstands 80 A non-repetitive surge for 20 ms (full sine cycle)
Rth(j-c)	1.6 °C/W - Enables efficient heat transfer to heatsink for thermal management
VTM	1.55 V - Low conduction drop reduces power dissipation at full load

Pinout & Package

BTB08-600TWRG is supplied in a non-insulated TO-220AB package (3-pin, through-hole). The tab is electrically connected to MT2 (A2) terminal and must be isolated from heatsink if required.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	AC line/load return path; referenced to gate for triggering
A2 (MT2)	Main Terminal 2	AC line input; connected to metal tab; requires isolation if heatsink grounded
G	Gate	Controls conduction onset; accepts 5 mA logic-level trigger pulse

Key Features

Feature	Design Value
Snubberless operation	Validated for inductive loads without RC snubber network, reducing BOM count and board space
Logic-level gate drive	5 mA max IGT enables direct interface with 3.3 V/5 V microcontrollers and low-power drivers
High commutation performance	(dV/dt)c ≥ 400 V/µs at 125 °C ensures reliable turn-off under worst-case inductive flyback
Robust surge rating	80 A ITSM (50 Hz, 20 ms) supports motor startup and transient overload conditions
Low on-state loss	1.55 V VTM and 50 mΩ RD minimize conduction heating at 8 A RMS

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: Triac-based phase-angle AC switching to adjust RMS voltage delivered to motor windings.

Use Value: Eliminates need for snubber circuitry while maintaining reliable zero-crossing–free commutation under high inductance.

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

IC Role / Device Role / Timing Role: Leading-edge phase-control switch triggered by microcontroller PWM timing.

Use Value: 5 mA IGT allows direct MCU GPIO drive, reducing component count and system cost.

Static Relay

Heating Regulation

Use Scenario: Solid-state replacement for electromechanical relays in HVAC, industrial controls, and PLC outputs.

IC Role / Device Role / Timing Role: Bidirectional AC power switch activated by logic-level control signal.

Use Value: Snubberless design ensures long-term reliability with resistive and mildly inductive loads without capacitor aging concerns.

Use Scenario: Precision temperature control in electric ovens, soldering stations, and process heaters.

IC Role / Device Role / Timing Role: Duty-cycled AC power delivery via phase-angle or burst-fire control.

Use Value: 8 A RMS rating and 1.6 °C/W Rth(j-c) support continuous thermal operation in compact enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB08-600SWRG	10 mA max IGT vs. 5 mA; same VDRM, package, and snubberless rating	Suitable where higher gate drive margin is acceptable; less sensitive to weak MCU outputs	Select when gate drive strength exceeds 10 mA or legacy design reuse is required
T835-600B	DPAK surface-mount package; 35 mA IGT; 400 V/µs dV/dt; no insulated tab	Requires PCB layout for thermal relief; not pin-compatible; lower IGT margin than BTB08-600TWRG	Choose for space-constrained SMT designs where TO-220AB mounting is impractical

Compared with BTB08-600SWRG, BTB08-600TWRG offers tighter gate sensitivity for marginal drive conditions; versus T835-600B, it provides through-hole mechanical robustness, higher surge rating (80 A vs. 67 A), and easier heatsinking - critical for industrial motor control.

Availability

BTB08-600TWRG is available at Aetrix Electronics and suitable for motor speed control, light dimming, static relay implementation, and heating regulation requiring stable component supply across production lifecycles.

Supply support for BTB08-600TWRG 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, specializing in power management, analog, MEMS, and microcontroller technologies.

BTB08-600TWRG belongs to ST's high-reliability snubberless triac product line, engineered specifically for robust AC switching in inductive and mixed-load industrial environments.

FAQ

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

The maximum operating junction temperature (Tj) is +125 °C, and the storage temperature range extends from –40 °C to +150 °C. Derating curves in Figure 2 confirm 8 A RMS operation is sustainable only up to Tc = 110 °C, requiring appropriate heatsinking to maintain Tj ≤ 125 °C under full load.

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

Yes - sustained 8 A RMS operation mandates a heatsink. At Tc = 110 °C, Rth(j-c) = 1.6 °C/W implies ~12.8 W power dissipation (P = I² × RD ≈ 64 × 0.05 = 3.2 W conduction + switching losses); ambient operation without heatsink is limited to ~2.5 A RMS per Figure 3, making thermal management essential for rated performance.

Can BTB08-600TWRG replace a standard 4-quadrant triac in existing designs?

Only with circuit review: BTB08-600TWRG is a 3-quadrant device (quadrants I, II, III), omitting quadrant IV operation. It cannot trigger on negative gate pulses relative to MT2. Designs relying on full 4Q triggering (e.g., certain legacy phase-control ICs) require verification of gate polarity compatibility before substitution.

Is the TO-220AB package of BTB08-600TWRG electrically insulated?

No - BTB08-600TWRG uses a non-insulated TO-220AB package. The metal tab is internally connected to MT2 (A2) and must be electrically isolated from the heatsink using mica or polymer insulators and shoulder washers. For insulated variants, refer to BTA08-600TWRG (TO-220AB Ins.) with 2500 VRMS isolation rating.

BTB08-600TWRG 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

BTB08-600TWRG FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your BTB08-600TWRG 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 BTB08-600TWRG?

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

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

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

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

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

Return procedure for BTB08-600TWRG:

1.Submit a request within 90 days.

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

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