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STMicroelectronics BTB41-800BRG
- Part No.:
- BTB41-800BRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TOP-3
- Datasheet:
-
BTB41-800BRG.pdf
- Description:
- TRIAC 800V 40A TOP3
- Quantity:
- Payment:
- Shipping:
Inventory:820
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Product details
Overview
BTB41-800BRG from STMicroelectronics is a 40 A, 800 V RMS non-insulated triac in TOP3 package, designed for AC mains switching in phase-control and on/off applications. It delivers 50 A/µs critical dI/dt, 0.6 °C/W junction-to-case thermal resistance, and supports up to 9 kW AC loads with proper heatsinking. Used in motor speed controllers and light dimmers where galvanic isolation is not required.
For engineers reviewing the BTB41-800BRG datasheet, BTB41-800BRG pinout, BTB41-800BRG application, or BTB41-800BRG equivalent, key selection criteria include non-insulated TOP3 mounting, 800 V blocking voltage, 40 A RMS current rating at Tc = 95 °C, and gate trigger current ≤50 mA in quadrants I–IV.
Technical Context
The BTB41-800BRG is a four-quadrant standard triac with symmetrical triggering characteristics across all gate polarity combinations. Its 500 V/µs minimum dV/dt (Tj = 125 °C) and 10 V/µs minimum (dV/dt)c ensure robust noise immunity during commutation.
Thermal performance is optimized for conduction-cooled operation: Rth(j-c) = 0.6 °C/W enables high-power AC switching without insulated mounting hardware. The device operates over -40 to +125 °C junction temperature range and supports full-cycle conduction up to 40 A RMS at case temperature of 95 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 40 A at Tc = 95 °C - defines maximum continuous AC load current with heatsink |
| VDRM / VRRM | 800 V - peak repetitive off-state voltage rating for 230 V / 400 V AC systems |
| IGT (QI–QIV) | ≤50 mA - maximum gate trigger current required for reliable turn-on in all quadrants |
| Rth(j-c) | 0.6 °C/W - enables efficient heat transfer to heatsink without insulation barrier |
| dl/dt (critical) | 50 A/µs - minimum rate of rise of on-state current before false triggering |
| VTM (ITM = 60 A) | ≤1.55 V at 25 °C - low on-state voltage minimizes conduction losses and heatsink size |
| IDRM / IRRM | ≤5 µA at 25 °C - ultra-low leakage ensures stable off-state blocking in high-impedance circuits |
Pinout & Package
BTB41-800BRG uses the non-insulated TOP3 power package (21.1 × 15.5 × 4.6 mm), designed for direct metal heatsink mounting without insulating washer. Thermal interface requires torque-controlled fastening (max 1.2 N·m).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main terminal 1 (anode 1) | Primary current path input; referenced as cathode for quadrant III/IV triggering |
| A2 | Main terminal 2 (anode 2) | Primary current path output; referenced as anode for quadrant I/II triggering |
| G | Gate | Control electrode accepting ≤50 mA trigger pulse to initiate conduction in any quadrant |
Key Features
| Feature | Design Value |
|---|---|
| Non-insulated TOP3 package | Enables direct thermal coupling to heatsink without thermal penalty of insulating layer |
| 40 A RMS current rating at Tc = 95 °C | Supports high-power AC switching up to 9 kW in heating/motor control with compact heatsink |
| Four-quadrant triggering (I–IV) | Eliminates need for external diodes or complex gate drive circuitry in phase-control designs |
| UL94 V0 flammability resin | Meets safety standards for enclosure-integrated power electronics in industrial equipment |
| RoHS-compliant lead-free construction | Complies with EU environmental directives without compromising thermal or electrical performance |
Applications
| Light Dimming Systems | Motor Speed Controllers |
|---|---|
|
Use Scenario: Phase-angle controlled AC voltage reduction to adjust incandescent/halogen lamp brightness. IC Role / Device Role / Timing Role: Main AC switching element triggered synchronously with zero-crossing detection to modulate RMS voltage. Use Value: 800 V VDRM withstands surge transients in 230 VAC mains; 50 mA IGT ensures compatibility with low-power microcontroller GPIOs. |
Use Scenario: Variable-speed control of single-phase induction motors in fans, pumps, and compressors. IC Role / Device Role / Timing Role: Bidirectional AC switch enabling adjustable conduction angle per half-cycle to regulate torque and speed. Use Value: 40 A IT(RMS) supports motors up to ~5.5 kW; 50 A/µs dl/dt prevents false turn-on during motor inductive kickback. |
| Static Relay Modules | Heating Regulation Circuits |
|
Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules and industrial I/O systems. IC Role / Device Role / Timing Role: High-reliability on/off AC switch activated by logic-level control signals without contact wear. Use Value: Non-insulated TOP3 allows direct heatsink mounting for >100,000 cycle life; 0.6 °C/W Rth(j-c) sustains 40 A switching without derating. |
Use Scenario: Duty-cycle or phase-control regulation of resistive heating elements in ovens, soldering stations, and HVAC systems. IC Role / Device Role / Timing Role: Power stage switch delivering precise thermal energy via proportional AC power delivery. Use Value: 1.55 V VTM at 60 A limits conduction loss to <93 W at full load; RoHS compliance meets appliance safety certifications. |
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 |
|---|---|---|---|
| BTA41-800BRG | Insulated TOP3 package (2500 Vrms isolation); Rth(j-c) = 0.9 °C/W | Required where galvanic isolation between heatsink and circuit ground is mandated | Select when safety standards require reinforced insulation or floating heatsink mounting |
| BTB41-600BRG | 600 V VDRM/VRRM rating; identical package, pinout, and thermal specs | Suitable only for 120 VAC or 230 VAC systems with low transient overvoltage risk | Choose for cost-sensitive 120 VAC applications where 800 V margin is unnecessary |
Compared with BTA41-800BRG, BTB41-800BRG offers lower thermal resistance but no isolation-ideal for grounded heatsink designs. Versus BTB41-600BRG, the 800 V rating provides essential surge margin in 230 VAC industrial environments with line transients.
Availability
BTB41-800BRG is available at Aetrix Electronics and suitable for light dimming systems, motor speed controllers, static relay modules, and heating regulation circuits requiring stable component supply and long-term industrial availability.
Supply support for BTB41-800BRG 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, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.
BTB41-800BRG belongs to ST's high-current triac product line engineered for robust, cost-effective AC mains switching in industrial controls, home appliances, and building automation systems.
FAQ
Is BTB41-800BRG pin-compatible with BTA41-800BRG?
No. BTB41-800BRG uses a non-insulated TOP3 package, while BTA41-800BRG uses an insulated TOP3 variant. Both share identical pin assignments (A1, A2, G), but the insulated version requires dielectric washers and higher mounting torque tolerance. Mechanical mounting holes and thermal pad layout differ due to internal insulation layer presence.
What is the maximum recommended heatsink temperature for continuous 40 A operation?
For continuous 40 A RMS operation, the case temperature (Tc) must not exceed 95 °C per datasheet absolute maximum ratings. With Rth(j-c) = 0.6 °C/W, this requires a heatsink temperature ≤95 °C under worst-case ambient and airflow conditions. Derating is mandatory above 95 °C case temperature-e.g., 32 A at Tc = 110 °C.
Can BTB41-800BRG be used in snubberless applications?
Yes-its minimum (dV/dt)c of 10 V/µs and 500 V/µs dV/dt rating at 125 °C enable snubberless operation in many resistive and lightly inductive loads. However, highly inductive loads (e.g., transformer primaries) still require RC snubbers to limit voltage overshoot during turn-off commutation.
Does BTB41-800BRG meet UL recognition requirements?
No. BTB41-800BRG is non-insulated and not UL 1557 recognized. Only BTA40 and BTA41 variants (insulated packages) carry UL recognition under file E81734. BTB41-800BRG complies with RoHS and UL94 V0 flammability, but system-level UL certification requires additional isolation design measures.
BTB41-800BRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TOP-3
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Standard
- Voltage - Off State:
- 800 V
- Current - On State (It (RMS)) (Max):
- 40 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 400A, 420A
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Current - Hold (Ih) (Max):
- 80 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TOP3
BTB41-800BRG FAQ
1.How can I place an order for BTB41-800BRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTB41-800BRG 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 BTB41-800BRG reliable?
The price and inventory of BTB41-800BRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTB41-800BRG is usually 5 days.
3.What payment methods are accepted for BTB41-800BRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTB41-800BRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTB41-800BRG?
BTB41-800BRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTB41-800BRG 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 BTB41-800BRG?
For technical support, including BTB41-800BRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTB41-800BRG requirements.
6.How does Aetrix verify that BTB41-800BRG is sourced from the original manufacturer or authorized distributors?
All BTB41-800BRG 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 BTB41-800BRG meets industry standards.
7.What is the process for return or replacement of BTB41-800BRG?
All BTB41-800BRG units undergo pre-shipment inspection (PSI). If there is an issue with BTB41-800BRG, 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 BTB41-800BRG part is unused and in its original packaging.
Return procedure for BTB41-800BRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BTB41-800BRG Tags
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