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STMicroelectronics BTA12-700SWRG
- Part No.:
- BTA12-700SWRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTA12-700SWRG.pdf
- Description:
- TRIAC SENS GATE 700V 12A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:266
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Product details
Overview
BTA12-700SWRG from STMicroelectronics is a 12 A RMS, 700 V repetitive peak off-state voltage (VDRM/VRRM), glass-passivated triac in TO-220AB insulated package, designed for phase control and static switching on resistive or inductive loads at 50/60 Hz line frequency, with 125 A non-repetitive surge current (8.3 ms) and 72 A²s I²t rating.
For engineers reviewing the BTA12-700SWRG datasheet, BTA12-700SWRG pinout, BTA12-700SWRG application, or BTA12-700SWRG equivalent, key selection criteria include gate trigger current (IGT ≤ 50 mA, Quadrant I–III), critical dV/dt (≥10 V/µs), junction-to-case thermal resistance (2.5 °C/W DC), commutation capability (dV/dt)c > 5 V/µs, and UL recognition (E81734) for 2500 V RMS insulation.
Technical Context
The BTA12-700SWRG is a four-quadrant, bidirectional thyristor optimized for AC mains switching with high surge immunity. Its glass-passivated PNPN structure enables stable triggering across quadrants I, II, III, and IV, with gate trigger voltage ≤1.5 V and holding current ≤50 mA at 25°C.
Thermal design relies on its low Rth(j-c) of 2.5 °C/W (DC) and 2.5 °C/W (360° conduction, 50 Hz), enabling 12 A RMS operation up to 90°C case temperature. The device meets UL insulation requirements (2500 V RMS) and supports snubberless operation in inductive loads due to (dV/dt)c > 5 V/µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 700 V - Withstands 700 V repetitive peak reverse/on-state blocking voltage at Tj = 125°C, suitable for 230 VAC mains with safety margin. |
| IT(RMS) | 12 A - Continuous RMS on-state current at Tc = 90°C, defining maximum steady-state load handling without heatsink derating. |
| ITSM (8.3 ms) | 125 A - Non-repetitive surge current capability for short-duration inrush events (e.g., motor startup, lamp cold filament). |
| I²t (10 ms) | 72 A²s - Energy withstand rating used to coordinate with fuse/fuseless protection schemes under fault conditions. |
| IGT (QI–QIII) | ≤50 mA - Maximum gate trigger current required to reliably turn on in primary operating quadrants, enabling direct microcontroller GPIO drive with series resistor. |
| (dV/dt)c | >5 V/µs - Minimum rate of rise of off-state voltage before spurious turn-on, supporting snubberless operation in inductive AC circuits. |
| Rth(j-c) | 2.5 °C/W - Junction-to-case thermal resistance (DC & 360° conduction), directly determining heatsink size needed for thermal management. |
Pinout & Package
Package: TO-220AB plastic, insulated (UL E81734 recognized), with metal tab electrically isolated from terminals. Mounting torque: 0.8 m·N recommended (max 1.0 m·N). Weight: 2.3 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate triggering; current flows between A1 and A2 during conduction; connected to load return side in standard phase-control wiring. |
| A2 (MT2) | Main Terminal 2 | High-side main current path; tied to AC line or load hot side; polarity relative to A1 defines quadrant behavior during triggering. |
| G | Gate | Control input for bidirectional turn-on; requires ≥500 mA peak pulse (tp = 20 µs) for reliable triggering in all quadrants; referenced to A1. |
Key Features
| Feature | Design Value |
|---|---|
| UL-recognized insulation | 2500 V RMS isolation between case and terminals (E81734), enabling safe mounting on grounded heatsinks without additional insulation. |
| High surge robustness | 125 A ITSM (8.3 ms) and 72 A²s I²t support repeated motor startups and transformer energization without degradation. |
| Snubberless commutation | (dV/dt)c > 5 V/µs allows direct connection to inductive loads (e.g., solenoids, contactors) without external RC snubbers in many 50/60 Hz applications. |
| Four-quadrant gate sensitivity | IGT ≤ 50 mA (QI–QIII) and ≤25 mA (QC variant) ensures compatibility with low-power drivers including optocouplers and logic-level MCUs. |
Applications
| Motor Speed Control | Light Dimming |
|---|---|
Use Scenario: Variable-speed control of universal or single-phase induction motors in power tools and fans. IC Role / Device Role / Timing Role: Bidirectional AC switch performing phase-angle control on 50/60 Hz mains to regulate average motor voltage and torque. Use Value: Enables smooth speed regulation with 12 A RMS current handling and 125 A surge tolerance for motor inrush currents. | Use Scenario: Leading-edge dimming of incandescent and halogen lamps in residential and commercial lighting. IC Role / Device Role / Timing Role: Main switching element in TRIAC-based dimmer circuits, triggered synchronously with zero-crossing detection. Use Value: Supports full-range dimming with low IGT (≤50 mA) for reliable triggering from standard optocoupler drivers. |
| Heating Element Control | Static AC Power Switching |
Use Scenario: On/off or proportional control of resistive heating elements in industrial ovens and HVAC systems. IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical contactors, switching 230 VAC/12 A loads without arcing or wear. Use Value: Delivers 12 A RMS continuous current with 2.5 °C/W thermal resistance, enabling compact heatsink integration in enclosed enclosures. | Use Scenario: Contactless replacement of relays in programmable logic controllers (PLCs) and building automation panels. IC Role / Device Role / Timing Role: High-reliability AC output stage switching inductive or resistive loads under microcontroller command. Use Value: UL-insulated TO-220AB package allows direct mounting to chassis ground, simplifying system-level safety certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTB12-700SWRG | Uninsulated TO-220AB package; Rth(j-c) = 2.0 °C/W (AC); no UL insulation rating. | Requires insulated mounting hardware; preferred where higher thermal efficiency is prioritized over safety isolation. | Select when heatsink isolation is already implemented externally and lower thermal resistance is critical. |
| Z0109MN | 9 A RMS rating; 700 V VDRM; TO-92 package; IGT ≤ 10 mA; no UL recognition. | Limited to low-power loads (<9 A); unsuitable for mains-connected industrial equipment requiring safety certification. | Use only in space-constrained, low-current consumer electronics where UL compliance is not mandated. |
Compared with BTB12-700SWRG and Z0109MN, the BTA12-700SWRG uniquely combines UL-recognized 2500 V insulation, 12 A RMS capacity, and snubberless commutation-making it the default choice for certified industrial AC control where safety, surge resilience, and thermal reliability are jointly required.
Availability
BTA12-700SWRG is available at Aetrix Electronics and suitable for motor speed control, lighting dimming, heating element regulation, and static AC power switching requiring stable component supply and long-term industrial lifecycle support.
Supply support for BTA12-700SWRG 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 discrete devices, analog ICs, microcontrollers, and automotive semiconductors.
The BTA/BTB12 family was engineered for robust, cost-effective AC mains switching in industrial controls and home appliances-emphasizing surge immunity, thermal stability, and safety-certified packaging.
FAQ
What is the maximum allowable case temperature for continuous 12 A RMS operation?
The BTA12-700SWRG supports 12 A RMS continuous conduction at Tc = 90°C, as specified in the Absolute Ratings table. Operation above this temperature requires linear derating per Fig.4; at 100°C case temperature, maximum RMS current drops to approximately 10.5 A.
Can BTA12-700SWRG be driven directly by a 3.3 V microcontroller GPIO?
No-direct 3.3 V GPIO drive is insufficient. Gate trigger current requirement is up to 50 mA (QI–QIII), and VGT is ≤1.5 V, but the gate needs ≥500 mA peak pulse (tp = 20 µs) for reliable turn-on. A driver stage (e.g., MOC302x optocoupler or discrete transistor buffer) is mandatory.
Is a snubber circuit required for inductive load switching?
A snubber is not strictly required due to (dV/dt)c > 5 V/µs, which enables snubberless operation in many 50/60 Hz inductive applications. However, for highly reactive loads (e.g., transformers with poor power factor), a small RC snubber (e.g., 100 Ω + 100 nF) is recommended to ensure long-term reliability.
What does the 'S' and 'W' in BTA12-700SWRG signify?
'S' denotes sensitive gate (IGT ≤ 50 mA in QI–QIII), 'W' indicates UL recognition (E81734) for 2500 V RMS insulation, and 'RG' specifies TO-220AB package with insulated tab and RoHS-compliant finish. The full suffix confirms compliance with safety, sensitivity, and environmental requirements.
BTA12-700SWRG 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:
- 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):
- 10 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
BTA12-700SWRG FAQ
1.How can I place an order for BTA12-700SWRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA12-700SWRG 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 BTA12-700SWRG reliable?
The price and inventory of BTA12-700SWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA12-700SWRG is usually 5 days.
3.What payment methods are accepted for BTA12-700SWRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA12-700SWRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA12-700SWRG?
BTA12-700SWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA12-700SWRG 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 BTA12-700SWRG?
For technical support, including BTA12-700SWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA12-700SWRG requirements.
6.How does Aetrix verify that BTA12-700SWRG is sourced from the original manufacturer or authorized distributors?
All BTA12-700SWRG 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 BTA12-700SWRG meets industry standards.
7.What is the process for return or replacement of BTA12-700SWRG?
All BTA12-700SWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA12-700SWRG, 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 BTA12-700SWRG part is unused and in its original packaging.
Return procedure for BTA12-700SWRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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