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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTA06-400BRG

Name: BTA06-400BRG
Brand: STMicroelectronics
SKU: BTA06-400BRG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BTA06-400BRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTA06-400BRG.pdf

Description:: TRIAC 400V 6A TO220

Quantity:: RFQ Add To RFQ list

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Inventory:9,369

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Product details

Overview

BTA06-400BRG from STMicroelectronics is a 6 A, 400 V RMS snubberless triac in insulated TO-220AB package, rated for 2500 V_RMS voltage isolation between tab and main terminals. It supports phase control and ON/OFF switching in AC loads, with logic-level gate sensitivity (I_GT ≤ 50 mA), high dV/dt immunity (≥400 V/µs), and robust commutation for inductive applications such as motor starters and heating regulators.

For engineers reviewing the BTA06-400BRG datasheet, BTA06-400BRG pinout, BTA06-400BRG application, or BTA06-400BRG equivalent, key selection criteria include insulated tab rating, snubberless operation on inductive loads, gate trigger current range, thermal resistance (R_th(j-c) = 2.7 °C/W), and compliance with UL E81734.

Technical Context

This triac operates in three quadrants (I, II, III) and features snubberless design enabling reliable commutation without external RC networks when driving inductive loads. Its insulated metal tab provides reinforced isolation (2500 V_RMS) and eliminates need for insulating hardware in heatsink mounting.

It delivers high critical dV/dt (≥400 V/µs at T_j = 125°C) and critical dI/dt (≥2.4 A/ms), with latching current (I_L) ≤ 70 mA and holding current (I_H) ≤ 50 mA - ensuring stable turn-on and noise-immune conduction under varying load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
I_T(RMS)	6 A - continuous AC load current handling capability at T_c = 105°C
V_DRM/V_RRM	400 V - peak repetitive off-state blocking voltage per direction
I_GT (Q1)	≤50 mA - maximum gate trigger current required to initiate conduction
dV/dt (min)	400 V/µs - minimum rate of voltage rise before false triggering at 125°C
R_th(j-c)	2.7 °C/W - thermal resistance from junction to case, defining heatsink sizing baseline
V_TM	1.55 V - on-state voltage drop at 8.5 A, determining conduction loss and self-heating
I²t (fusing)	21 A²s - single-pulse surge withstand capacity (10 ms), guiding fuse coordination

Pinout & Package

Package: TO-220AB insulated variant with electrically isolated metal tab rated at 2500 V_RMS (UL E81734). Tab serves as A2 terminal and enables direct heatsink mounting without insulation kit.

Pin/Terminal	Circuit Role	Design Meaning
A1	Main Terminal 1	Reference anode for bidirectional conduction; connects to load return path
A2	Main Terminal 2 / Tab	Isolated metal tab serving as second main terminal; mounts directly to heatsink
G	Gate	Control input for triggering conduction in quadrants I, II, and III

Key Features

Feature	Design Value
Snubberless operation	Enables direct drive of inductive loads (e.g., motors, solenoids) without external RC snubber network
Insulated tab (2500 V_RMS)	Eliminates need for mica washers or silicone pads in heatsink mounting; simplifies mechanical assembly
Logic-level gate sensitivity	I_GT ≤ 50 mA allows direct interface with microcontroller GPIO or low-power drivers without buffer stages
High commutation performance	(dI/dt)_c ≥ 2.4 A/ms at 10 V/µs ensures reliable turn-off under fast-decaying inductive currents

Applications

AC Motor Starter

Heating Element Controller

Use Scenario: Starting single-phase induction motors in HVAC blowers or appliance compressors.

IC Role / Device Role / Timing Role: Bidirectional AC switch controlling power delivery during startup and run phases.

Use Value: Snubberless design prevents false turn-on during back-EMF transients; insulated tab simplifies grounded-chassis mounting.

Use Scenario: Regulating resistive heating elements in ovens, water heaters, or soldering stations.

IC Role / Device Role / Timing Role: Phase-angle controlled AC power switch modulating RMS voltage delivered to heater.

Use Value: High dV/dt immunity (>400 V/µs) rejects line noise during zero-crossing detection; 6 A rating supports up to 1.3 kW at 230 VAC.

Light Dimmer Module

Static Relay Replacement

Use Scenario: Mains-connected residential dimmer circuits using leading-edge phase control.

IC Role / Device Role / Timing Role: Main switching element triggered by timing circuit to adjust conduction angle per half-cycle.

Use Value: Logic-level gate (I_GT ≤ 50 mA) interfaces directly with 5 V MCU timers; TO-220AB package enables compact PCB layout.

Use Scenario: Solid-state replacement for electromechanical relays in industrial PLC output modules.

IC Role / Device Role / Timing Role: Fail-safe AC load switch activated by low-voltage control signal.

Use Value: 2500 V_RMS isolation meets reinforced insulation requirements for safety-critical control outputs; 60 A non-repetitive surge rating handles relay-coil inrush.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB06-400BRG	Non-insulated TO-220AB package; tab electrically connected to A2	Requires insulating hardware for heatsink mounting; unsuitable where chassis grounding conflicts with A2 potential	Select when cost-sensitive and isolation not required; verify heatsink insulation separately
BTA06-600B	Higher V_DRM/V_RRM = 600 V; otherwise identical pinout, sensitivity, and package	Better suited for 277 VAC or unstable mains environments with higher transient risk	Select when operating above 240 VAC nominal or in regions with poor grid regulation

Compared with BTB06-400BRG and BTA06-600B, the BTA06-400BRG uniquely combines 400 V blocking, snubberless operation, and certified 2500 V_RMS isolation - making it optimal for safety-critical, space-constrained, inductive-load AC control where direct heatsink mounting is required.

Availability

BTA06-400BRG is available at Aetrix Electronics and suitable for AC motor starters, heating controllers, light dimmers, and static relay replacements requiring stable component supply across industrial automation, appliance manufacturing, and building controls.

Supply support for BTA06-400BRG 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/BTB06 series belongs to ST's high-reliability power discrete portfolio, engineered specifically for robust AC power control in harsh electromagnetic environments with inductive loads.

FAQ

What is the maximum junction temperature for continuous operation?

The BTA06-400BRG has a maximum operating junction temperature of +125°C. Derating is required above case temperatures of 105°C, as specified in Figure 2 of the datasheet. Thermal design must ensure R_th(j-a) remains within limits when ambient exceeds 50°C or airflow is restricted.

Can this triac be used without a snubber circuit?

Yes - the "B" suffix denotes snubberless operation. It is qualified for direct inductive load switching (e.g., motors, transformers) without external RC snubbers due to guaranteed high commutation performance (dI/dt ≥ 2.4 A/ms at 10 V/µs) and dV/dt immunity ≥ 400 V/µs at 125°C.

Is the metal tab electrically isolated from the leads?

Yes - the insulated TO-220AB package provides 2500 V_RMS isolation between the metal tab (A2) and the lead frame (A1, G), certified under UL file E81734. This allows safe direct mounting to grounded heatsinks without additional insulation hardware.

What gate drive voltage is required to guarantee turn-on?

A gate pulse of ≥12 V with ≥50 mA peak current (per I_GT max spec) applied for ≥10 µs guarantees turn-on across all operating temperatures. For reliable logic-level interfacing, a 15 V, 100 mA capable driver is recommended to accommodate aging and temperature drift.

BTA06-400BRG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Triac Type:: Standard

Voltage - Off State:: 400 V

Current - On State (It (RMS)) (Max):: 6 A

Voltage - Gate Trigger (Vgt) (Max):: 1.3 V

Current - Non Rep. Surge 50, 60Hz (Itsm):: 60A, 63A

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

BTA06-400BRG FAQ

1.How can I place an order for BTA06-400BRG through Aetrix?

Please submit a Request for Quotation (RFQ) for BTA06-400BRG 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 BTA06-400BRG reliable?

The price and inventory of BTA06-400BRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA06-400BRG is usually 5 days.

3.What payment methods are accepted for BTA06-400BRG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA06-400BRG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTA06-400BRG?

BTA06-400BRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTA06-400BRG 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 BTA06-400BRG?

For technical support, including BTA06-400BRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA06-400BRG requirements.

6.How does Aetrix verify that BTA06-400BRG is sourced from the original manufacturer or authorized distributors?

All BTA06-400BRG 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 BTA06-400BRG meets industry standards.

7.What is the process for return or replacement of BTA06-400BRG?

All BTA06-400BRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA06-400BRG, 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 BTA06-400BRG part is unused and in its original packaging.

Return procedure for BTA06-400BRG:

1.Submit a request within 90 days.

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

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