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STMicroelectronics BTB12-800CWRG
- Part No.:
- BTB12-800CWRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTB12-800CWRG.pdf
- Description:
- TRIAC ALTERNISTOR 800V 12A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:998
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Product details
Overview
BTB12-800CWRG from STMicroelectronics is a 12 A, 800 V Snubberless™ triac in TO-220AB package, designed for robust AC mains switching in inductive loads. It features 35 mA gate trigger current (IGT), 2500 VRMS insulated tab, and high commutation capability (dV/dt ≥ 500 V/µs at 125 °C) - enabling reliable operation in motor controls and heating systems without external snubbers.
For engineers reviewing the BTB12-800CWRG datasheet, BTB12-800CWRG pinout, BTB12-800CWRG application, or BTB12-800CWRG equivalent, key selection criteria include insulated tab rating, 3Q commutation performance, gate sensitivity for microcontroller-driven triggering, and thermal resistance (Rth(j-c) = 2.3 °C/W) for conduction-cooled designs.
Technical Context
This triac operates in three quadrants (I, II, III) with Snubberless™ architecture optimized for inductive load commutation. Its internal ceramic insulation enables 2500 VRMS isolation between tab and MT1/MT2 terminals, meeting UL1557 (file E81734).
It delivers 12 A RMS on-state current at Tc = 90 °C with low on-state voltage (VTM ≤ 1.55 V at 17 A) and high surge tolerance (ITSM = 120 A, 50 Hz). Gate trigger threshold is specified at 1.3 V max, supporting direct drive from logic-level controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 12 A - Sustains continuous AC load current up to 12 A at case temperature ≤90 °C |
| VDRM / VRRM | 800 V - Blocks 800 V peak off-state voltage, suitable for 230 VAC + margin and 400 VDC bus applications |
| IGT (Snubberless) | 35 mA - Low gate drive requirement enables compatibility with MCU GPIO or optocoupler outputs |
| dV/dt (min) | 500 V/µs at Tj = 125 °C - Resists false turn-on during fast voltage transients in inductive circuits |
| Rth(j-c) | 2.3 °C/W - Enables efficient heat transfer to heatsink; supports 12 A operation with modest thermal design |
| VTM | ≤1.55 V at 17 A - Low conduction loss reduces power dissipation and thermal stress under full load |
| Insulation Rating | 2500 VRMS - Certified isolated tab meets reinforced insulation requirements for safety-critical AC mains interfaces |
Pinout & Package
BTB12-800CWRG uses the TO-220AB insulated package with electrically isolated metal tab. The tab serves as MT2 terminal and provides 2500 VRMS isolation from circuit ground, eliminating need for insulating washers in mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 | Main Terminal 1 | AC line or load return path; referenced to gate for triggering |
| MT2 | Main Terminal 2 | Isolated tab terminal; connects to AC source or load hot side; rated 2500 VRMS to PCB |
| G | Gate | Control input; triggers conduction when IGT ≥ 35 mA applied between G and MT1 |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless™ commutation | Enables direct switching of inductive loads (e.g., universal motors, solenoids) without RC snubber networks |
| UL1557-certified insulation | 2500 VRMS reinforced isolation certified per file E81734 - simplifies safety compliance in industrial and appliance designs |
| Low thermal resistance | Rth(j-c) = 2.3 °C/W allows 12 A RMS operation with compact heatsinking at Tc ≤ 90 °C |
| High dV/dt immunity | 500 V/µs minimum at 125 °C prevents spurious turn-on in noisy motor drive or dimmer environments |
| RoHS-compliant packaging | TO-220AB insulated package meets EU Directive 2011/65/EU - no lead, brominated flame retardants, or heavy metals |
Applications
| Induction Motor Starter | Industrial Heating Controller |
|---|---|
|
Use Scenario: Starting single-phase induction motors in HVAC blowers and compressor circuits. IC Role / Device Role / Timing Role: Main AC power switch enabling zero-crossing or phase-controlled start-up sequence. Use Value: High commutation capability prevents misfiring during back-EMF transients; insulated tab eliminates creepage concerns on PCB-mounted heatsinks. |
Use Scenario: Regulating resistive heating elements in ovens, dryers, and process tanks. IC Role / Device Role / Timing Role: ON/OFF or phase-angle controlled power delivery to heater coils. Use Value: 800 V blocking rating accommodates 230 VAC mains with surge margin; 12 A rating supports up to ~2.7 kW resistive load. |
| Light Dimmer for Incandescent/Halogen | Static Relay Replacement |
|
Use Scenario: Leading-edge phase-cut dimming in residential and commercial lighting panels. IC Role / Device Role / Timing Role: Bidirectional AC switch triggered by zero-crossing detector and timing circuit. Use Value: 35 mA IGT ensures reliable triggering from standard optotriac drivers; Snubberless™ behavior avoids snubber-induced waveform distortion. |
Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules and control panels. IC Role / Device Role / Timing Role: Isolated AC load switching element interfaced via optocoupler. Use Value: 2500 VRMS tab isolation replaces relay coil-to-contact barrier; long life and silent operation vs. mechanical bounce and contact wear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac-based AC switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTA12-800CWRG | TO-220AB insulated package; identical electrical specs but different marking and packaging code | Same insulation rating and Snubberless™ performance; differs only in part numbering convention (BTA vs BTB series) | Select BTA12-800CWRG if requiring ST's BTA-series branding or legacy BOM alignment |
| T1235-800G | D²PAK surface-mount package; same 35 mA IGT and 800 V rating but Rth(j-c) = 1.4 °C/W and no insulated tab | Requires PCB-level isolation design; better thermal performance but unsuitable where reinforced insulation is mandated | Choose T1235-800G for space-constrained SMT designs where tab isolation is not required and heatsinking is via copper pour |
Compared with BTA12-800CWRG, this part shares identical triac die and insulation certification but uses BTB-series marking; versus T1235-800G, it trades SMT footprint and lower thermal resistance for mandatory reinforced isolation and through-hole mounting robustness.
Availability
BTB12-800CWRG is available at Aetrix Electronics and suitable for industrial heating controllers, static relay replacements, induction motor starters, and light dimmers requiring stable component supply across production lifecycles.
Supply support for BTB12-800CWRG 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, and microcontrollers for industrial, automotive, and consumer markets.
BTB12-800CWRG belongs to ST's Snubberless™ triac product line, engineered specifically for reliable, snubber-free AC power control in inductive and resistive loads across appliance, building automation, and factory equipment.
FAQ
What is the maximum junction temperature for BTB12-800CWRG?
The maximum operating junction temperature is +125 °C, as specified in Table 1 of DS2115 Rev 12. Operation beyond this limit risks irreversible degradation of the silicon die and insulation integrity. Thermal design must ensure Tj remains ≤125 °C under worst-case ambient and load conditions.
Does BTB12-800CWRG require a heatsink in all applications?
Yes - due to its 12 A RMS rating and Rth(j-c) = 2.3 °C/W, a heatsink is required to maintain Tc ≤ 90 °C. Without heatsinking, power dissipation would exceed safe limits even at moderate currents; derating curves in Figure 2 confirm thermal necessity above ~3 A at ambient temperatures >50 °C.
Can BTB12-800CWRG be used with DC loads?
No - it is a bidirectional AC switch (triac) and cannot block DC voltage. Attempting DC operation causes immediate latch-on after first trigger due to absence of natural current zero-crossing, leading to uncontrolled conduction and potential device failure.
What does the 'C' in BTB12-800CWRG indicate?
The 'C' denotes 25 mA gate trigger sensitivity for standard (non-Snubberless™) triacs, but in this part number it is overridden by the 'W' suffix indicating Snubberless™ operation with 35 mA IGT. Per Figure 16 and Table 8, BTB12-800CWRG is a Snubberless™ variant with 35 mA IGT, not 25 mA.
BTB12-800CWRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Alternistor - Snubberless
- 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):
- 35 mA
- Current - Hold (Ih) (Max):
- 35 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
BTB12-800CWRG FAQ
1.How can I place an order for BTB12-800CWRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTB12-800CWRG 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 BTB12-800CWRG reliable?
The price and inventory of BTB12-800CWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTB12-800CWRG is usually 5 days.
3.What payment methods are accepted for BTB12-800CWRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTB12-800CWRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTB12-800CWRG?
BTB12-800CWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTB12-800CWRG 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 BTB12-800CWRG?
For technical support, including BTB12-800CWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTB12-800CWRG requirements.
6.How does Aetrix verify that BTB12-800CWRG is sourced from the original manufacturer or authorized distributors?
All BTB12-800CWRG 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 BTB12-800CWRG meets industry standards.
7.What is the process for return or replacement of BTB12-800CWRG?
All BTB12-800CWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTB12-800CWRG, 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 BTB12-800CWRG part is unused and in its original packaging.
Return procedure for BTB12-800CWRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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