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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTA04-700TRG

Name: BTA04-700TRG
Brand: STMicroelectronics
SKU: BTA04-700TRG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BTA04-700TRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTA04-700TRG.pdf

Description:: TRIAC SENS GATE 700V 4A TO220

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Inventory:2,749

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Product details

Overview

BTA04-700TRG from STMicroelectronics is a sensitive-gate, insulated triac rated for 4 A RMS on-state current and 700 V repetitive peak off-state voltage (VDRM/VRRM), designed for phase-control and static switching in 4-quadrant AC applications. It features low gate trigger current (IGT ≤ 10 mA), low holding current (IH ≤ 15 mA), and glass-passivated PNPN structure with 2500 V_RMS insulation rating (UL E81734).

For engineers reviewing the BTA04-700TRG datasheet, BTA04-700TRG pinout, BTA04-700TRG application, or BTA04-700TRG equivalent, key selection criteria include quadrants I–IV gate sensitivity, dV/dt immunity (≥10 V/µs), thermal resistance (R_th(j-c) = 4.4 °C/W), surge capability (I_TSM = 40 A @ 10 ms), and TO-220AB package compatibility with heatsink mounting.

Technical Context

This triac operates across all four quadrants with verified gate triggering in Quadrants I, II, III, and IV - critical for zero-crossing and random-phase AC control. Its sensitive gate enables direct drive from microcontrollers or optocouplers without amplification, supported by V_GT ≤ 1.5 V and I_GT ≤ 10 mA at T_j = 25°C.

Thermal design is constrained by R_th(j-c) = 4.4 °C/W (DC) and R_th(j-a) = 60 °C/W, requiring heatsinking for sustained 4 A conduction. The device sustains dV/dt ≥ 10 V/µs (Quadrants III/IV) and dI/dt = 10 A/µs (repetitive) under standard 50 Hz operation.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	4 A - maximum continuous AC load current at Tc = 90°C, defining thermal derating envelope
VDRM / VRRM	700 V - peak blocking voltage in both directions, enabling use in 240 VAC mains with safety margin
IGT (max)	10 mA - lowest gate current required to trigger in Quadrants I–III, allowing direct MCU GPIO drive
IH (max)	15 mA - minimum load current needed to maintain conduction, ensuring reliable turn-off below threshold
dV/dt (min)	10 V/µs - minimum rate of voltage rise before false triggering, critical for noisy industrial AC lines
Rth(j-c)	4.4 °C/W - junction-to-case thermal resistance, dictating heatsink size for 4 A steady-state operation
ITSM (10 ms)	40 A - non-repetitive surge current capacity, supporting motor startup or lamp inrush

Pinout & Package

Supplied in TO-220AB plastic package with insulated tab (UL recognized, 2500 V_RMS isolation), featuring three leads: A1 (MT1), A2 (MT2), and G (Gate). Mounting torque: 0.8 m·N (recommended), max 1.0 m·N.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	Reference terminal for gate triggering; polarity defines quadrant behavior during AC half-cycle
A2 (MT2)	Main Terminal 2	Current return path; voltage polarity relative to A1 determines conduction quadrant
G	Gate	Control input; triggers conduction when I_G ≥ I_GT with appropriate V_A2-A1 polarity

Key Features

Feature	Design Value
Sensitive gate	IGT ≤ 10 mA enables direct drive from 3.3 V/5 V logic without buffer stages
4-quadrant operation	Verified triggering in all quadrants supports universal phase-control topologies
Insulated TO-220AB package	2500 V_RMS isolation eliminates need for insulating hardware in high-voltage PCB layouts
High dV/dt immunity	≥10 V/µs in Quadrants III/IV prevents false turn-on from line transients
Low holding current	IH ≤ 15 mA ensures clean turn-off even with light inductive loads

Applications

Light Dimming Control

Motor Speed Regulation

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

IC Role / Device Role / Timing Role: Main power switch controlling AC half-cycle conduction angle via gate timing synchronized to zero-crossing.

Use Value: Low I_GT and 4Q operation allow precise, flicker-free dimming without external gate drivers.

Use Scenario: Variable-speed control of universal AC motors in power tools and kitchen appliances.

IC Role / Device Role / Timing Role: Bidirectional AC switch modulating average power delivered to motor windings.

Use Value: High dV/dt immunity prevents spurious turn-on during commutation spikes from brushed motor brushes.

Heating Element Control

Static AC Power Switching

Use Scenario: On/off and proportional control of resistive heating elements in ovens, water heaters, and industrial process equipment.

IC Role / Device Role / Timing Role: Zero-voltage switching (ZVS) or burst-fire controlled power delivery to thermal load.

Use Value: Insulated TO-220AB package simplifies creepage/clearance compliance in Class I appliances.

Use Scenario: Solid-state replacement of electromechanical relays in HVAC actuators, industrial PLC outputs, and building automation systems.

IC Role / Device Role / Timing Role: Fail-safe AC load switching with galvanic isolation between control and power domains.

Use Value: UL-recognized 2500 V_RMS insulation eliminates need for external isolation barriers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB04-700TW	Non-insulated TO-220AB package; R_th(j-c) = 3.2 °C/W (lower thermal resistance)	Requires external insulation for high-voltage isolation; better suited for heatsink-mounted chassis-grounded designs	Select when board-level isolation is handled separately and lower thermal resistance is prioritized
MAC4DHM-700	Higher I_GT (≤ 35 mA); same VDRM and IT(RMS); TO-220AB package	Less suitable for direct microcontroller drive; requires gate buffer stage in low-power control circuits	Select only if existing gate driver circuitry already accommodates higher trigger current

Compared with BTB04-700TW and MAC4DHM-700, BTA04-700TRG uniquely combines insulation, low I_GT, and 700 V rating in a single TO-220AB device-enabling compact, isolated AC switching without added isolation components or gate buffers.

Availability

BTA04-700TRG is available at Aetrix Electronics and suitable for light dimming control, motor speed regulation, and heating element control requiring stable component supply and long-term industrial availability.

Supply support for BTA04-700TRG 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, designing and manufacturing analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The BTA/BTB triac family targets robust, cost-effective AC power control - optimized for reliability in phase-control, static switching, and solid-state relay replacement applications across mains-powered equipment.

FAQ

What is the maximum junction temperature for continuous operation?

The BTA04-700TRG has a specified operating junction temperature range of −40°C to +110°C. For continuous 4 A RMS conduction, case temperature must be held ≤90°C per datasheet derating curves, requiring heatsinking due to R_th(j-c) = 4.4 °C/W.

Can this triac be driven directly by a 3.3 V microcontroller GPIO?

Yes - with I_GT ≤ 10 mA and V_GT ≤ 1.5 V at 25°C, a 3.3 V GPIO can drive the gate through a series resistor (e.g., 220 Ω) to limit current to ~10 mA, satisfying trigger requirements without level-shifting or buffering.

Is the TO-220AB package electrically insulated?

Yes - the BTA04-700TRG uses an insulated TO-220AB package with 2500 V_RMS isolation between the metal tab (A2) and internal die, certified under UL E81734. This allows direct mounting to grounded heatsinks without additional insulation hardware.

What is the minimum dV/dt rating in Quadrant IV?

The datasheet specifies dV/dt ≥ 10 V/µs minimum in Quadrant IV at T_j = 110°C with gate open. This value ensures immunity to fast-rising transients on the A2–A1 terminals during negative half-cycles with reverse gate bias.

BTA04-700TRG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Triac Type:: Logic - Sensitive Gate

Voltage - Off State:: 700 V

Current - On State (It (RMS)) (Max):: 4 A

Voltage - Gate Trigger (Vgt) (Max):: 1.5 V

Current - Non Rep. Surge 50, 60Hz (Itsm):: 40A, 42A

Current - Gate Trigger (Igt) (Max):: 5 mA

Current - Hold (Ih) (Max):: 15 mA

Configuration:: Single

Operating Temperature:: -40°C ~ 110°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

BTA04-700TRG FAQ

1.How can I place an order for BTA04-700TRG through Aetrix?

Please submit a Request for Quotation (RFQ) for BTA04-700TRG 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 BTA04-700TRG reliable?

The price and inventory of BTA04-700TRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA04-700TRG is usually 5 days.

3.What payment methods are accepted for BTA04-700TRG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA04-700TRG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTA04-700TRG?

BTA04-700TRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTA04-700TRG 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 BTA04-700TRG?

For technical support, including BTA04-700TRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA04-700TRG requirements.

6.How does Aetrix verify that BTA04-700TRG is sourced from the original manufacturer or authorized distributors?

All BTA04-700TRG 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 BTA04-700TRG meets industry standards.

7.What is the process for return or replacement of BTA04-700TRG?

All BTA04-700TRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA04-700TRG, 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 BTA04-700TRG part is unused and in its original packaging.

Return procedure for BTA04-700TRG:

1.Submit a request within 90 days.

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

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