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STMicroelectronics BTA12-800BRG
- Part No.:
- BTA12-800BRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTA12-800BRG.pdf
- Description:
- TRIAC 800V 12A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:690
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Product details
Overview
BTA12-800BRG from STMicroelectronics is an insulated TO-220AB-packaged 4-quadrant triac rated for 12 A RMS on-state current and 800 V off-state blocking voltage, with 50 mA gate trigger current (IGT), designed for mains-powered AC switching in static relays, heating controls, and motor starters.
For engineers reviewing the BTA12-800BRG datasheet, BTA12-800BRG pinout, BTA12-800BRG application, or BTA12-800BRG equivalent, this part supports robust commutation on inductive loads without snubber circuits, offers UL1557-certified insulation (2500 VRMS tab isolation), and delivers stable thermal performance up to 125 °C junction temperature.
Technical Context
This triac operates in all four quadrants (I–IV) with standard triggering characteristics, supporting phase-control and zero-crossing switching in universal AC line applications. Its gate threshold voltage (VGT ≤ 1.3 V) and holding current (IH ≤ 50 mA) enable reliable turn-on and latching under low-power drive conditions.
Thermal design is enabled by a maximum junction-to-case thermal resistance of 2.3 °C/W and a 2500 VRMS insulated tab compliant with UL file E81734. The device sustains non-repetitive surge currents up to 120 A at 50 Hz and maintains dV/dt immunity ≥ 200 V/µs at 125 °C without external snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 12 A - Sustains continuous AC load current in mains-powered appliances and industrial controls |
| VDRM / VRRM | 800 V - Blocks peak line voltages up to 565 V RMS (e.g., 400 VAC three-phase systems) |
| IGT (max) | 50 mA - Compatible with standard microcontroller GPIO or optocoupler drivers without amplification |
| dV/dt (min) | 200 V/µs at Tj = 125 °C - Resists false triggering during fast transients on inductive loads |
| Rth(j-c) | 2.3 °C/W - Enables 12 A operation with ≤27.6 W power dissipation at 105 °C case temperature |
| VTM (max) | 1.55 V at 17 A - Limits conduction loss to ≤26.4 W at full RMS current, reducing heatsink requirements |
| IDRM / IRRM | 1 mA at 125 °C - Ensures low leakage during high-temperature standby in sealed enclosures |
Pinout & Package
Package: TO-220AB Insulated - Features ceramic-insulated tab rated for 2500 VRMS isolation per UL1557 (file E81734); mounting torque: 0.55 N·m (recommended), max 0.70 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate drive; connects to load return or neutral side in AC switching |
| A2 (MT2) | Main Terminal 2 | High-side AC line connection; carries full load current and withstands 800 V blocking |
| G | Gate | Low-energy control input; triggers conduction when ≥50 mA pulse applied with proper polarity |
Key Features
| Feature | Design Value |
|---|---|
| UL1557-certified insulation | 2500 VRMS isolated tab enables safe mounting to grounded heatsinks in Class I appliances |
| High commutation capability (4Q) | Supports reliable turn-off under inductive load conditions without snubber networks |
| RoHS-compliant packaging | TO-220AB Ins. meets EU Directive 2011/65/EU; lead-free leads and halogen-free molding compound |
| Thermal robustness | Operates continuously at Tj = 125 °C with validated Rth(j-c) = 2.3 °C/W for predictable derating |
| Standard sensitivity grade | 50 mA IGT ensures compatibility with legacy optotriac drivers (e.g., MOC3021/MOC3041) |
Applications
| Heating Regulation | Static Relay |
|---|---|
|
Use Scenario: Precise temperature control in electric ovens, water heaters, and HVAC duct heaters using phase-angle firing. IC Role / Device Role / Timing Role: Main AC power switch triggered by microcontroller-generated phase-delayed pulses. Use Value: Eliminates mechanical contact wear; enables smooth power ramping and digital setpoint integration. |
Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules and building automation panels. IC Role / Device Role / Timing Role: Bidirectional AC switching element controlled via optocoupled isolation. Use Value: 100x longer lifetime than EM relays; silent operation and no contact bounce in safety-critical circuits. |
| Induction Motor Starter | Light Dimmer (Incandescent/Halogen) |
|
Use Scenario: Soft-start and run control for single-phase induction motors in fans, pumps, and compressors. IC Role / Device Role / Timing Role: High-current AC switch enabling gradual voltage ramp-up to limit inrush current. Use Value: Reduces mechanical stress on motor windings and extends capacitor life in start circuits. |
Use Scenario: Leading-edge dimming in residential and commercial lighting systems with incandescent or halogen lamps. IC Role / Device Role / Timing Role: Phase-controlled mains switch synchronized to zero-crossing detection circuitry. Use Value: Delivers flicker-free dimming down to 5% brightness with minimal EMI generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-quadrant triac applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTA12-800BW | Snubberless™ version with same 800 V rating but higher commutation immunity (dV/dt ≥ 1000 V/µs) and 50 mA IGT | Preferred for highly inductive loads (e.g., transformer primaries, solenoid valves) where snubberless operation is mandatory | Select BW if operating without snubber components and driving reactive loads with rapid voltage transients |
| BTB12-800B | Non-insulated TO-220AB variant; identical electrical specs but uninsulated tab (no 2500 VRMS isolation) | Requires insulated mounting hardware; unsuitable for direct heatsink grounding in Class I safety designs | Choose BTB12-800B only when mechanical layout allows full galvanic isolation between tab and chassis ground |
Compared with BTA12-800BRG, the BW variant improves transient immunity for snubberless inductive switching, while BTB12-800B reduces cost and thermal resistance but forfeits UL-rated insulation-making BTA12-800BRG optimal for safety-critical, grounded-heatsink deployments.
Availability
BTA12-800BRG is available at Aetrix Electronics and suitable for heating regulation, static relay modules, and induction motor starter circuits requiring stable component supply across industrial OEM and appliance production programs.
Supply support for BTA12-800BRG 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, delivering innovative analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The BTA12 series belongs to ST's high-reliability power discrete portfolio, engineered specifically for robust AC mains switching in safety-certified appliances and industrial controls where insulation integrity and thermal stability are critical.
FAQ
Is BTA12-800BRG certified for reinforced insulation?
Yes. The insulated TO-220AB package carries UL1557 certification (file E81734) with 2500 VRMS isolation between the tab and internal die, meeting reinforced insulation requirements for Class I equipment per IEC 60730 and IEC 60335 standards.
What is the maximum recommended case temperature for continuous 12 A operation?
Per DS2115 Rev 12 Figure 2, the maximum case temperature for continuous 12 A RMS operation is 90 °C. Exceeding this requires derating; at 105 °C case, IT(RMS) must be reduced to approximately 9.5 A to maintain Tj ≤ 125 °C.
Can BTA12-800BRG replace BTA12-600BRG in existing designs?
Yes, with verification of voltage margin. The 800 V VDRM/VRRM provides greater peak voltage headroom than the 600 V version-especially beneficial in 230 VAC systems with high line surges or 400 VAC three-phase applications-while maintaining identical pinout, thermal, and gate drive characteristics.
Does this triac require a heat sink in all applications?
Yes, for any sustained IT(RMS) > 2 A. At 12 A, power dissipation exceeds 18 W (based on VTM and RD), necessitating a heatsink sized to achieve ≤90 °C case temperature. Thermal resistance data (Rth(j-c) = 2.3 °C/W) and PCB copper area guidelines are provided in DS2115 Section 5.
BTA12-800BRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Standard
- Voltage - Off State:
- 800 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-220AB Insulated
BTA12-800BRG FAQ
1.How can I place an order for BTA12-800BRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA12-800BRG 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 BTA12-800BRG reliable?
The price and inventory of BTA12-800BRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA12-800BRG is usually 5 days.
3.What payment methods are accepted for BTA12-800BRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA12-800BRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA12-800BRG?
BTA12-800BRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA12-800BRG 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 BTA12-800BRG?
For technical support, including BTA12-800BRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA12-800BRG requirements.
6.How does Aetrix verify that BTA12-800BRG is sourced from the original manufacturer or authorized distributors?
All BTA12-800BRG 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 BTA12-800BRG meets industry standards.
7.What is the process for return or replacement of BTA12-800BRG?
All BTA12-800BRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA12-800BRG, 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 BTA12-800BRG part is unused and in its original packaging.
Return procedure for BTA12-800BRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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