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STMicroelectronics BTA12-800CWRG
- Part No.:
- BTA12-800CWRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTA12-800CWRG.pdf
- Description:
- TRIAC ALTERNSTR 800V 12A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
BTA12-800CWRG from STMicroelectronics is a 12 A, 800 V insulated triac in TO-220AB Ins. package, designed for AC mains switching in phase-controlled and ON/OFF applications. It features 35 mA maximum gate trigger current (IGT), 2500 VRMS isolated tab, and Snubberless™ operation enabling reliable commutation on inductive loads without external snubbers.
For engineers reviewing the BTA12-800CWRG datasheet, BTA12-800CWRG pinout, BTA12-800CWRG application, or BTA12-800CWRG equivalent, this part is selected for high-reliability AC power control where thermal resistance (Rth(j–c) = 2.3 °C/W), dV/dt immunity (≥500 V/µs), and UL1557-certified insulation are critical design requirements.
Technical Context
This triac operates in three quadrants (I, II, III) with Snubberless™ architecture optimized for inductive load commutation. Its internal ceramic insulation provides 2500 VRMS isolation between the tab and MT1/MT2 terminals, meeting UL1557 (file E81734).
It delivers 12 A RMS on-state current at Tc = 90 °C, supports non-repetitive surge currents up to 120 A (50 Hz), and maintains stable triggering across –40 to +125 °C junction temperature with IGT guaranteed ≤35 mA at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 12 A - Sustained AC load current capability at case temperature ≤90 °C |
| VDRM / VRRM | 800 V - Peak repetitive off-state voltage blocking rating |
| IGT (max) | 35 mA - Maximum gate trigger current required for turn-on under worst-case conditions |
| dV/dt (min) | 500 V/µs - Minimum rate of voltage rise the device can withstand without false triggering |
| Rth(j–c) | 2.3 °C/W - Junction-to-case thermal resistance enabling efficient heatsink coupling |
| Isolation Voltage | 2500 VRMS - Reinforced insulation barrier between metal tab and main terminals |
| UL Certification | UL1557 (E81734) - Recognized for safety-critical AC mains isolation applications |
Pinout & Package
Package: TO-220AB Insulated - epoxy-molded, UL94 V0 rated, with electrically isolated metal tab (2500 VRMS). Mounting torque: 0.55 N·m (recommended), max 0.70 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 (Main Terminal 1) | Anode 1 / return path for AC current | Primary current return terminal; referenced to gate for triggering polarity |
| MT2 (Main Terminal 2) | Anode 2 / main AC line terminal | High-side AC connection point; voltage polarity defines quadrant conduction |
| G (Gate) | Control input | Triggers conduction when ≥35 mA pulse applied relative to MT1; enables 3-quadrant operation |
| Tab (isolated) | Thermal interface / mechanical mounting surface | Electrically isolated from MT1/MT2; must be connected to heatsink without additional insulation |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless™ operation | Enables direct drive of inductive loads (e.g., motors, solenoids) without external RC snubber networks |
| UL1557-certified insulation | 2500 VRMS reinforced isolation meets safety standards for mains-connected equipment |
| Low thermal resistance | Rth(j–c) = 2.3 °C/W allows higher power density and reduced heatsink size vs. standard TO-220AB |
| High commutation capability | (dV/dt)c ≥ 500 V/µs ensures reliable turn-off under fast voltage transients on inductive loads |
| RoHS-compliant packaging | Meets EU Directive 2011/65/EU; lead-free terminations and halogen-free molding compound |
Applications
| Induction Motor Starter | Industrial Heating Controller |
|---|---|
Use Scenario: Starting and stopping single-phase induction motors in HVAC blowers or pump drives. IC Role / Device Role / Timing Role: Triac acts as bidirectional AC switch triggered by zero-crossing or phase-angle controller to manage motor energization timing. Use Value: Snubberless™ operation eliminates need for snubber components, reducing BOM count and PCB area while maintaining reliable turn-off during motor back-EMF spikes. | Use Scenario: Regulating resistive heating elements in industrial ovens or plastic extruders. IC Role / Device Role / Timing Role: Functions as ON/OFF or phase-controlled power switch controlled by PID output or microcontroller PWM signal. Use Value: 12 A RMS rating and 2.3 °C/W thermal resistance support continuous 2.7 kW @ 230 VAC with compact heatsinking. |
| Light Dimmer for Incandescent Lamps | Static Relay Replacement |
Use Scenario: Phase-cut dimming circuits for residential/commercial incandescent lighting systems. IC Role / Device Role / Timing Role: Triac conducts during adjustable portion of AC half-cycle based on gate trigger timing from DIAC or optocoupler. Use Value: 35 mA IGT enables direct drive from low-power logic-level controllers; 800 V rating accommodates 230 VAC mains with margin for surges. | Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules or building automation panels. IC Role / Device Role / Timing Role: Provides galvanically isolated, wear-free AC switching with no contact bounce or arcing. Use Value: UL1557-certified 2500 VRMS isolation ensures safe separation between control logic and 230/400 VAC loads per IEC 61000-4-5 and IEC 61810 standards. |
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 |
|---|---|---|---|
| BTA12-800BWRG | Same package and voltage rating, but 50 mA IGT (vs. 35 mA); standard (non-Snubberless™) version | Lacks high dV/dt immunity (200 V/µs); requires external snubber for inductive loads | Select only if gate drive strength exceeds 50 mA and load is resistive or lightly inductive |
| T1235-800G | D²PAK surface-mount package; same 35 mA IGT and Snubberless™ performance; Rth(j–c) = 1.4 °C/W | No isolated tab; requires PCB-level isolation design for safety-critical mains interfaces | Choose for space-constrained designs where thermal performance outweighs isolation convenience |
Compared with BTA12-800BWRG, this part offers superior inductive load handling without snubbers; versus T1235-800G, it provides ready-made 2500 VRMS isolation but requires through-hole assembly and larger board footprint.
Availability
BTA12-800CWRG is available at Aetrix Electronics and suitable for industrial heating controllers, static relay replacements, induction motor starters, and light dimmers requiring stable component supply and certified isolation.
Supply support for BTA12-800CWRG 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, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.
The BTA series belongs to ST's high-reliability AC power switching portfolio, engineered specifically for robust mains-connected control in harsh thermal and electrical environments.
FAQ
What is the maximum allowable case temperature for continuous operation?
The BTA12-800CWRG is rated for continuous 12 A RMS operation at Tc ≤ 90 °C. Exceeding this temperature reduces current derating per Figure 2 in DS2115; at 100 °C case, maximum IT(RMS) drops to ~10.5 A. Thermal design must ensure heatsink interface resistance and ambient conditions maintain Tc within limit.
Does the insulated tab require additional isolation hardware when mounted to a heatsink?
No - the TO-220AB Ins. package integrates a ceramic insulating pad rated for 2500 VRMS, allowing direct mounting to an earthed or floating heatsink without mica washers or silicone pads. Mechanical torque must stay within 0.55–0.70 N·m to preserve insulation integrity.
Can this triac replace a BTA12-600CWRG in an existing design?
Yes, with full functional compatibility: both share identical package, pinout, IGT (35 mA), and Snubberless™ behavior. The 800 V VDRM/VRRM rating provides higher surge margin than 600 V, improving robustness against mains transients without circuit modification.
What is the minimum gate trigger pulse width required for reliable turn-on?
A minimum 20 µs gate pulse width is required to ensure latching, as specified by IG(t) integral (I²t) threshold in datasheet Table 1. For logic-level drivers, use ≥50 µs pulses to accommodate propagation delay and ensure margin across temperature and aging.
BTA12-800CWRG 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-220AB Insulated
BTA12-800CWRG FAQ
1.How can I place an order for BTA12-800CWRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA12-800CWRG 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 BTA12-800CWRG reliable?
The price and inventory of BTA12-800CWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA12-800CWRG is usually 5 days.
3.What payment methods are accepted for BTA12-800CWRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA12-800CWRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA12-800CWRG?
BTA12-800CWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA12-800CWRG 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 BTA12-800CWRG?
For technical support, including BTA12-800CWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA12-800CWRG requirements.
6.How does Aetrix verify that BTA12-800CWRG is sourced from the original manufacturer or authorized distributors?
All BTA12-800CWRG 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 BTA12-800CWRG meets industry standards.
7.What is the process for return or replacement of BTA12-800CWRG?
All BTA12-800CWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA12-800CWRG, 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 BTA12-800CWRG part is unused and in its original packaging.
Return procedure for BTA12-800CWRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BTA12-800CWRG Tags
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