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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTA12-700BRG

Name: BTA12-700BRG
Brand: STMicroelectronics
SKU: BTA12-700BRG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BTA12-700BRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTA12-700BRG.pdf

Description:: TRIAC 700V 12A TO220

Quantity:: RFQ Add To RFQ list

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Inventory:7,496

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Product details

Overview

BTA12-700BRG from STMicroelectronics is a 12 A RMS, 700 V repetitive peak off-state voltage (VDRM/VRRM), insulated TO-220AB triac designed for phase-controlled AC power switching in resistive and inductive loads. It delivers 125 A non-repetitive surge current (8.3 ms), 72 A²s I²t rating, and 10 A/µs critical dI/dt, enabling robust static switching in motor controls and lighting dimmers.

For engineers reviewing the BTA12-700BRG datasheet, BTA12-700BRG pinout, BTA12-700BRG application, or BTA12-700BRG equivalent, key selection criteria include its 2500 V_RMS isolation rating, 1.5 V maximum on-state voltage at 17 A, 50 mA max gate trigger current (Quadrant B), and thermal resistance of 2.5 °C/W (junction-to-case, DC).

Technical Context

This triac operates as a bidirectional thyristor with four-quadrant triggering capability (I–IV), supporting both positive and negative A2-to-A1 voltage polarities. Its glass-passivated PNPN structure ensures high commutation robustness (dV/dt_c ≥ 10 V/µs) and stable turn-off under inductive load conditions.

Thermal design relies on junction-to-case conduction (2.5 °C/W DC) and requires external heatsinking; maximum case temperature is 90 °C at full 12 A RMS conduction. Gate drive uses a 33 Ω series resistor with 12 V DC supply to meet 50 mA I_GT (B-suffix) and 40 mA I_L holding current specs.

Key Specifications

Parameter	Value and Actual Design Meaning
VDRM / VRRM	700 V - Sustains peak AC line voltages up to 495 V RMS (e.g., 230 VAC + 30% surge)
IT(RMS)	12 A - Continuous AC load current handling at Tc = 90 °C with heatsink
ITSM (8.3 ms)	125 A - Withstands single-cycle motor startup surges without failure
I²t (10 ms)	72 A²s - Quantifies fusing energy limit for short-circuit protection coordination
dI/dt (repetitive)	10 A/µs - Supports fast-switching phase control without false triggering
VTM @ 17 A	1.5 V max - Limits conduction loss to ≤25.5 W at full surge current
Rth(j-c)	2.5 °C/W - Dictates minimum heatsink thermal resistance for safe 12 A operation

Pinout & Package

Package: TO-220AB plastic, insulated (UL E81734 recognized), 2.3 g weight, 0.8 m·N recommended mounting torque.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	Reference electrode; connected to neutral or low-side AC line in standard configuration
A2 (MT2)	Main Terminal 2	High-side AC line connection; voltage polarity relative to A1 determines quadrant conduction
G	Gate	Trigger input; requires ≥50 mA pulse (Quadrant B) to initiate conduction in either direction

Key Features

Feature	Design Value
2500 V_RMS insulation	Enables safe isolation between mains and control circuitry without additional barrier components
High dV/dt immunity (≥10 V/µs)	Prevents false turn-on during rapid AC voltage transients in noisy industrial environments
Low V_TM (1.5 V max)	Reduces power dissipation and thermal stress compared to legacy triacs with >2 V drop
Quadrant B sensitivity	Optimized for standard microcontroller-driven zero-crossing or phase-angle control circuits

Applications

AC Motor Speed Control

Industrial Lighting Dimming

Use Scenario: Variable-speed fan or pump driven by 230 VAC single-phase supply with microcontroller-based phase-angle control.

IC Role / Device Role / Timing Role: Main power switching element; triggered synchronously with AC zero-crossing to regulate average power delivered to motor winding.

Use Value: 125 A surge rating handles locked-rotor currents; 700 V VDRM accommodates 230 VAC line + transient spikes per EN 61000-4-5.

Use Scenario: DALI-compatible architectural lighting system dimming incandescent/halogen lamps via leading-edge phase-cut.

IC Role / Device Role / Timing Role: Bidirectional AC switch; gate driven by optocoupler-isolated PWM signal to adjust conduction angle per half-cycle.

Use Value: 10 A/µs dI/dt ensures clean turn-on without oscillation into highly inductive lamp filaments; 2.5 °C/W Rth(j-c) enables compact heatsink integration.

Heating Element Regulation

Static AC Power Switching

Use Scenario: Solid-state relay replacement in electric oven or water heater using PID-controlled resistive heating elements.

IC Role / Device Role / Timing Role: On/off or phase-controlled power delivery device; operated in burst-fire mode or continuous conduction depending on temperature setpoint.

Use Value: 72 A²s I²t allows coordination with 10 A slow-blow fuses; 12 A RMS rating supports up to 2.76 kW at 230 VAC.

Use Scenario: Contactless replacement of electromechanical relays in HVAC zone dampers or industrial solenoid drivers.

IC Role / Device Role / Timing Role: Zero-voltage switching (ZVS) enabled triac; triggered only near AC zero-crossing to minimize EMI and contact arcing.

Use Value: 2500 V_RMS isolation eliminates need for reinforced creepage spacing on PCB; TO-220AB package simplifies mounting to metal chassis for EMI shielding.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB12-700BW	Uninsulated TO-220AB package; Rth(j-c) = 2.0 °C/W; no 2500 V_RMS isolation	Requires reinforced PCB isolation or enclosure barriers for mains safety compliance	Select when board-level isolation is already implemented and lower thermal resistance is prioritized
Q6012LH4	600 V VDRM; 12 A RMS; 100 A ITSM; sensitive gate (10 mA IGT); TO-220 insulated	Lower voltage rating limits use to 120 VAC systems; higher sensitivity reduces driver complexity	Select for North American 120 VAC applications where gate drive simplicity outweighs 700 V margin

Compared with BTB12-700BW and Q6012LH4, BTA12-700BRG uniquely combines 700 V rating, 2500 V_RMS isolation, and Quadrant B gate sensitivity-making it optimal for globally deployed 230 VAC industrial controls requiring safety certification and surge resilience.

Availability

BTA12-700BRG is available at Aetrix Electronics and suitable for AC motor speed control, industrial lighting dimming, heating element regulation, and static AC power switching requiring stable component supply across global production programs.

Supply support for BTA12-700BRG 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, and discrete devices for industrial, automotive, and consumer markets.

The BTA/BTB12 family was engineered for high-reliability AC power control in harsh environments-emphasizing surge immunity, thermal stability, and safety-certified insulation for mains-connected equipment.

FAQ

What is the maximum allowable case temperature for continuous 12 A RMS operation?

The BTA12-700BRG is rated for 12 A RMS at Tc = 90 °C. Exceeding this temperature requires derating per Fig.4 in the datasheet: at 100 °C case temperature, maximum RMS current drops to ~10.5 A. Thermal design must ensure junction temperature stays ≤125 °C under worst-case ambient and load conditions.

Can BTA12-700BRG be used in zero-crossing switched applications?

Yes-its Quadrant B gate sensitivity (50 mA I_GT) and 10 V/µs dV/dt immunity make it well-suited for zero-crossing operation. However, gate triggering must occur within ±10 µs of the zero-crossing point to avoid misfiring; use of an optocoupler with precise timing (e.g., MOC3021) is recommended for reliable synchronization.

Is heatsinking mandatory for 12 A RMS operation?

Yes. With Rth(j-c) = 2.5 °C/W and power dissipation ≈18 W at 12 A RMS (based on V_TM ≈ 1.5 V), even modest ambient temperatures require a heatsink. Without heatsinking, junction temperature would exceed 150 °C almost immediately. A 1.5 °C/W heatsink + thermal interface yields ~95 °C junction rise at 12 A, staying within spec.

What does the 'R' and 'G' suffixes indicate in BTA12-700BRG?

The 'R' denotes tape-and-reel packaging (standard for automated assembly); 'G' indicates RoHS-compliant, lead-free finish per EU Directive 2011/65/EU. Both suffixes reflect packaging and environmental compliance-not electrical or thermal differences from the base BTA12-700B part.

BTA12-700BRG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Triac Type:: Standard

Voltage - Off State:: 700 V

Current - On State (It (RMS)) (Max):: 12 A

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

Current - Non Rep. Surge 50, 60Hz (Itsm):: 120A, 126A

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

BTA12-700BRG FAQ

1.How can I place an order for BTA12-700BRG through Aetrix?

Please submit a Request for Quotation (RFQ) for BTA12-700BRG 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 BTA12-700BRG reliable?

The price and inventory of BTA12-700BRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA12-700BRG is usually 5 days.

3.What payment methods are accepted for BTA12-700BRG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA12-700BRG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTA12-700BRG?

BTA12-700BRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTA12-700BRG 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 BTA12-700BRG?

For technical support, including BTA12-700BRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA12-700BRG requirements.

6.How does Aetrix verify that BTA12-700BRG is sourced from the original manufacturer or authorized distributors?

All BTA12-700BRG 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 BTA12-700BRG meets industry standards.

7.What is the process for return or replacement of BTA12-700BRG?

All BTA12-700BRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA12-700BRG, 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 BTA12-700BRG part is unused and in its original packaging.

Return procedure for BTA12-700BRG:

1.Submit a request within 90 days.

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

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