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STMicroelectronics BTA40-600B
- Part No.:
- BTA40-600B
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- RD91-3 (Insulated)
- Datasheet:
-
BTA40-600B.pdf
- Description:
- TRIAC 600V 40A RD91
- Quantity:
- Payment:
- Shipping:
Inventory:3,080
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Product details
Overview
BTA40-600B from STMicroelectronics is a 40 A, 600 V RMS insulated TRIAC in RD91 package, designed for high-power AC switching in static relays and motor control circuits. It features 50 mA gate trigger current (IGT), 0.9 °C/W junction-to-case thermal resistance, and UL 1557 recognition (file ref: 81734) for reinforced insulation up to 2500 Vrms. Used with proper heatsinking, it supports AC loads up to 9 kW.
For engineers reviewing the BTA40-600B datasheet, BTA40-600B pinout, BTA40-600B application, or BTA40-600B equivalent, this page delivers verified electrical specs, thermal performance data, isolation rating confirmation, and real-world phase-control use cases - all aligned with DS2111 Rev 13 (July 2023).
Technical Context
The BTA40-600B is a four-quadrant, standard-sensitivity TRIAC optimized for robust AC line commutation. Its 500 V/µs minimum dV/dt at 125 °C and 50 A/µs critical di/dt ensure reliable turn-on under noisy mains conditions while avoiding false triggering.
It operates across –40 °C to +125 °C junction temperature range with 1.55 V max on-state voltage (VTM) at 25 °C and 60 A, and maintains 10 mΩ dynamic resistance (RD) at Tj = 125 °C - enabling low conduction loss in high-current heating and motor speed control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 40 A - Sustains continuous AC load current up to 9 kW at 230 VAC with appropriate heatsink |
| VDRM / VRRM | 600 V - Blocks peak line voltages up to 600 V in 230–240 VAC systems with safety margin |
| IGT (Quadrant I–IV) | 50 mA max - Compatible with standard microcontroller GPIO or optocoupler gate drivers |
| Rth(j-c) | 0.9 °C/W - Enables precise thermal design when mounted on heatsink with known interface resistance |
| Isolation Rating | 2500 Vrms - Reinforced insulation between MT1/MT2 terminals and mounting tab per UL 1557 |
| dV/dt (min) | 500 V/µs at Tj = 125 °C - Resists false triggering from fast transients on AC mains |
| I2t (tp = 10 ms) | 1000 A²s - Withstands short-circuit energy during fault clearing in industrial AC distribution |
Pinout & Package
Package: RD91 - Insulated metal tab power package with M4 mounting screw, UL94 V0 epoxy resin, and 0.9 °C/W thermal resistance. Dimensions: 40.0 × 27.0 × 14.0 mm (L × W × H); weight: 20 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate trigger; connects to AC line neutral or lower-potential side of load |
| A2 (MT2) | Main Terminal 2 | High-side AC line or load connection; voltage polarity defines quadrant conduction behavior |
| G | Gate | Controls bidirectional conduction onset; requires ≥50 mA pulse into 33 Ω load per datasheet test condition |
| Tab (Isolated) | Thermal & Mechanical Interface | Electrically isolated mounting surface rated 2500 Vrms; enables direct heatsink attachment without insulating washer |
Key Features
| Feature | Design Value |
|---|---|
| UL 1557 Recognition | File ref 81734 confirms reinforced insulation integrity - eliminates need for external creepage/clearance verification in safety-certified designs |
| Low Rth(j-c) | 0.9 °C/W enables compact thermal solution for 40 A RMS operation - reduces heatsink mass by ~30% vs. comparable 1.3 °C/W devices |
| High dV/dt Immunity | 500 V/µs minimum at 125 °C ensures stable operation in EMI-heavy environments like industrial motor drives and dimmer stacks |
| RoHS & ECOPACK2 | Lead-free, halogen-free RD91 package compliant with EU Directive 2002/95/EC and ST's environmental standards |
Applications
| Heating Regulation | Light Dimming |
|---|---|
Use Scenario: Precise temperature control in electric ovens, water heaters, and HVAC duct heaters using zero-crossing or phase-angle firing. IC Role / Device Role / Timing Role: Main AC power switch executing phase-controlled conduction to regulate average power delivered to resistive heating elements. Use Value: 40 A RMS rating and 0.9 °C/W thermal resistance support sustained 9 kW operation with minimal derating at 80 °C case temperature. |
Use Scenario: Mains-connected residential and commercial lighting dimmers with leading-edge or trailing-edge phase control. IC Role / Device Role / Timing Role: Bidirectional AC switch triggered by microcontroller or analog timing circuit to adjust conduction angle per half-cycle. Use Value: 50 mA IGT and 500 V/µs dV/dt immunity ensure clean turn-on even with noisy triac driver waveforms and inductive lamp ballasts. |
| Induction Motor Starting | Static Relay Replacement |
Use Scenario: Soft-start and run-capacitor switching in single-phase induction motors for fans, pumps, and compressors. IC Role / Device Role / Timing Role: High-current AC switch replacing electromechanical contactors to eliminate arcing, wear, and acoustic noise. Use Value: 420 A non-repetitive surge rating (tp = 16.7 ms) handles locked-rotor inrush currents without failure. |
Use Scenario: Solid-state replacement of mechanical relays in PLC output modules, building automation controllers, and industrial I/O cards. IC Role / Device Role / Timing Role: Isolated AC power switch providing galvanic separation and long-term reliability in on/off control loops. Use Value: 2500 Vrms reinforced insulation meets IEC 61000-4-5 surge immunity requirements for industrial control cabinet mounting. |
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 |
|---|---|---|---|
| BTB41-600BRG | Same 40 A/600 V rating but non-insulated TOP3 package; Rth(j-c) = 0.6 °C/W; no 2500 Vrms isolation | Requires insulating hardware for PCB mounting; better suited for space-constrained board-level designs where isolation is handled elsewhere | Select when thermal efficiency is prioritized over mounting simplicity and safety certification burden is managed externally |
| BTA41-600BRG | Same 40 A/600 V rating in insulated TOP3 package; identical 2500 Vrms isolation; Rth(j-c) = 0.9 °C/W; 4.5 g vs. 20 g weight | Lower thermal mass and smaller footprint; less suitable for direct bolt-down heatsinking; requires tube packaging handling | Select when board-level integration, reduced weight, and UL-compliant insulation are required without RD91 mechanical robustness |
Compared with BTB41-600BRG and BTA41-600BRG, the BTA40-600B offers superior mechanical ruggedness and direct heatsink compatibility via RD91, making it optimal for high-vibration, high-power industrial enclosures where long-term thermal stability outweighs footprint constraints.
Availability
BTA40-600B is available at Aetrix Electronics and suitable for heating regulation, light dimming, induction motor starting, and static relay replacement requiring stable component supply across industrial OEM production cycles.
Supply support for BTA40-600B 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 silicon solutions for automotive, industrial, and power applications since 1987.
The BTA40 series belongs to ST's high-power AC switch product line, engineered specifically for robust, certified, and thermally efficient AC mains control in safety-critical industrial and appliance systems.
FAQ
What is the maximum continuous power this TRIAC can switch?
The BTA40-600B supports up to 9 kW AC load when operated at 40 A RMS with case temperature maintained at ≤80 °C using a properly sized heatsink. This assumes 230 VAC nominal supply and full 180° conduction; actual power depends on thermal interface resistance and ambient conditions per Figure 2 in DS2111.
Does BTA40-600B require a heatsink in all applications?
Yes - the RD91 package requires mechanical mounting to a heatsink for any sustained current above ~5 A RMS. At 40 A RMS, junction temperature exceeds safe limits within seconds without heatsinking. Thermal design must account for Rth(j-c) = 0.9 °C/W plus interface and heatsink resistance per AN533.
Can BTA40-600B replace BTA40-600BW?
No - BTA40-600BW is a non-insulated variant (W = non-insulated RD91). The "B" suffix in BTA40-600B denotes insulated tab (2500 Vrms), confirmed in ordering scheme Figure 12. Substitution would compromise safety isolation and violate UL 1557 compliance in certified designs.
What gate drive circuit is recommended?
A 33 Ω series resistor with ≥50 mA peak current capability is required per datasheet test condition (VD = 12 V, RL = 33 Ω). Optocouplers like MOC3041 or IL420 provide safe, isolated triggering; microcontroller GPIO must be buffered via transistor or dedicated TRIAC driver IC to meet IGT and di/dt requirements.
BTA40-600B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- RD91-3 (Insulated)
- Packaging:
- Bulk
- Product Status:
- Active
- Triac Type:
- Standard
- Voltage - Off State:
- 600 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:
- Chassis Mount
- Supplier Device Package:
- RD91
BTA40-600B FAQ
1.How can I place an order for BTA40-600B through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA40-600B 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 BTA40-600B reliable?
The price and inventory of BTA40-600B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA40-600B is usually 5 days.
3.What payment methods are accepted for BTA40-600B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA40-600B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA40-600B?
BTA40-600B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA40-600B 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 BTA40-600B?
For technical support, including BTA40-600B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA40-600B requirements.
6.How does Aetrix verify that BTA40-600B is sourced from the original manufacturer or authorized distributors?
All BTA40-600B 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 BTA40-600B meets industry standards.
7.What is the process for return or replacement of BTA40-600B?
All BTA40-600B units undergo pre-shipment inspection (PSI). If there is an issue with BTA40-600B, 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 BTA40-600B part is unused and in its original packaging.
Return procedure for BTA40-600B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BTA40-600B Tags
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Z0103NN5AA4
STMicroelectronics
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Z0107MNT1G
Littelfuse Inc.
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Z0103MNT1G
Littelfuse Inc.
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