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STMicroelectronics BTA26-800CWRG
- Part No.:
- BTA26-800CWRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TOP-3 Insulated
- Datasheet:
-
BTA26-800CWRG.pdf
- Description:
- TRIAC ALTERNISTOR 800V 25A TOP3
- Quantity:
- Payment:
- Shipping:
Inventory:8
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Product details
Overview
BTA26-800CWRG from STMicroelectronics is a 25 A, 800 V RMS snubberless triac in TOP3 insulated package, rated for 2500 VRMS insulation, with 35 mA gate trigger current (IGT) in quadrants I/II/III and 500 V/µs dV/dt immunity at 125 °C - used for phase-controlled AC motor speed regulation and static relay switching in industrial heating systems.
For engineers reviewing the BTA26-800CWRG datasheet, BTA26-800CWRG pinout, BTA26-800CWRG application, or BTA26-800CWRG equivalent, key selection criteria include snubberless 3-quadrant commutation capability, low thermal resistance (0.9 °C/W), high turn-off commutation margin, and UL1557 recognition (file 81734) for safety-critical AC power control designs.
Technical Context
This triac operates in snubberless 3-quadrant mode (I/II/III), enabling robust turn-off without external snubbers under inductive loads. Its 500 V/µs dV/dt rating at 125 °C and 13 A/ms critical di/dt ensure reliable commutation in motor starting and dimmer circuits with high reactive content.
Thermal performance is defined by Rth(j–c) = 0.9 °C/W (max), supporting 25 A RMS conduction at Tc = 100 °C. The insulated tab provides reinforced isolation (2500 VRMS, 1 min), meeting UL1557 requirements for mains-connected equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 25 A - supports continuous AC load switching up to 6 kW at 240 VAC without forced cooling |
| VDRM / VRRM | 800 V - blocks peak line voltages up to 566 VAC RMS with 40% safety margin for 230 VAC + transients |
| IGT (Snubberless) | 35 mA - enables direct drive from microcontroller GPIO or low-power optocouplers (e.g., MOC302x) |
| dV/dt (min) | 500 V/µs at 125 °C - prevents false triggering in noisy industrial environments with fast-rising transients |
| Rth(j–c) | 0.9 °C/W max - allows 25 A operation with ≤22.5 °C junction-to-case temperature rise at full load |
| VTM (max) | 1.55 V at 35 A - limits on-state power loss to ≤54 W at peak current, reducing heatsink requirements |
| Insulation Voltage | 2500 VRMS (1 min) - satisfies reinforced insulation requirements for Class I appliances and industrial controls |
Pinout & Package
Package: TOP3 insulated (plastic case with electrically isolated metal tab). Tab is connected to A2 terminal and rated for 2500 VRMS isolation from heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main Terminal 1 (Anode 1) | Reference terminal for gate trigger; connects to load return side in standard configuration |
| A2 | Main Terminal 2 (Anode 2) | Connected to insulated tab; serves as high-side AC line connection and thermal path to heatsink |
| G | Gate | Controls conduction onset; triggers in quadrants I (A2+, G+), II (A2−, G+), III (A2−, G−) |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless 3-quadrant operation | Enables zero-crossing or phase-angle control without RC snubber networks - reduces BOM count and board space in motor drives |
| UL1557 recognition | Validated per file 81734 for reinforced insulation - eliminates need for additional safety certification testing in end equipment |
| Low Rth(j–c) | 0.9 °C/W max - permits higher RMS current in compact heatsinks or natural convection designs |
| High dV/dt immunity | 500 V/µs at 125 °C - ensures stable operation with inductive loads like induction motors and solenoids |
| RoHS-compliant & lead-free | Meets 2002/95/EC directive; epoxy meets UL94 V0 flammability rating - supports global environmental compliance |
Applications
| Industrial Heating Control | AC Motor Speed Regulation |
|---|---|
|
Use Scenario: Precise temperature regulation in electric ovens and injection molding heaters using phase-angle firing. IC Role / Device Role / Timing Role: Snubberless triac acting as bidirectional AC switch, triggered mid-cycle to adjust RMS power delivered to resistive heating elements. Use Value: Eliminates snubber components while maintaining noise immunity and thermal stability at 25 A continuous load. |
Use Scenario: Variable-speed control of single-phase induction motors in HVAC blowers and conveyor drives. IC Role / Device Role / Timing Role: Main power switch in phase-control topology, synchronized to zero-crossing detection for smooth torque delivery. Use Value: Withstands 13 A/ms critical di/dt during motor turn-off, preventing commutation failure under high inductance. |
| Static Relay Replacement | Light Dimming Systems |
|
Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules and building automation panels. IC Role / Device Role / Timing Role: High-reliability AC switching element with 2500 VRMS isolation, enabling direct mounting to grounded chassis. Use Value: Insulated tab eliminates creepage/clearance concerns, simplifying PCB layout and safety certification. |
Use Scenario: Leading-edge dimmer circuits for residential and commercial LED/incandescent lighting. IC Role / Device Role / Timing Role: Phase-controlled AC switch triggered by TRIAC driver IC (e.g., MOC3023) to modulate lamp brightness. Use Value: 35 mA IGT allows direct drive from low-current optocouplers, reducing gate drive circuit complexity and cost. |
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 |
|---|---|---|---|
| BTA26-800BRG | Standard 4-quadrant trigger (IGT = 50 mA), lower dV/dt immunity (500 V/µs same, but no snubberless optimization) | Requires external snubber for inductive loads; less robust in motor starting | Select when full 4-quadrant operation (including quadrant IV) is required and snubber design is acceptable |
| BTB26-800CWRG | Same electrical specs but non-insulated TOP3 package (Rth(j–c) = 0.6 °C/W, no 2500 VRMS isolation) | Tab is electrically connected to A2 - requires insulated mounting hardware for safety-critical designs | Select for cost-sensitive, non-safety-critical applications where heatsink isolation is managed externally |
Compared with BTA26-800BRG, this part offers superior snubberless commutation and lower gate drive demand; compared with BTB26-800CWRG, it delivers certified reinforced insulation essential for mains-connected equipment without added isolation barriers.
Availability
BTA26-800CWRG is available at Aetrix Electronics and suitable for industrial heating control, AC motor speed regulation, and static relay replacement requiring stable component supply, long-term lifecycle support, and UL-recognized safety compliance.
Supply support for BTA26-800CWRG 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
BTA26 belongs to ST's high-power triac product line, engineered specifically for robust, snubberless AC power control in safety-certified industrial and appliance applications.
FAQ
What does "CWRG" signify in BTA26-800CWRG?
The suffix "CWRG" decodes as: C = snubberless version with 35 mA IGT (quadrants I/II/III), W = tape-and-reel packaging (though RG indicates tube; per ST's ordering scheme, "CWRG" denotes snubberless 800 V in tube format), R = RoHS-compliant, G = standard grade. This matches ST's official ordering code structure in DS13701 Rev 2, Table 7.
Can BTA26-800CWRG replace a BTA16-600B in an existing design?
No - BTA26-800CWRG has higher voltage (800 V vs. 600 V), higher current (25 A vs. 16 A), and snubberless 3-quadrant operation versus standard 4-quadrant. Direct replacement risks overvoltage stress on gate drive and altered commutation behavior; thermal and layout validation is mandatory due to higher power dissipation and different IGT.
Is the insulated tab internally connected to A2?
Yes - the insulated metal tab is electrically tied to A2 and rated for 2500 VRMS isolation from the heatsink. This is confirmed in the package outline (Figure 11), insulation test specification (Table 1, VINS = 2500 V), and application note AN4375, which states "A2 is connected to the isolated tab" for BTA-series devices.
Does this triac require a heat sink in all applications?
Yes - even at 25 A RMS, junction temperature exceeds safe limits without thermal management. At Tc = 100 °C, maximum allowable power dissipation is ~22.5 W (based on Rth(j–c) = 0.9 °C/W); actual on-state loss exceeds this above ~15 A. ST recommends a heatsink sized per Figure 1 and derating curves in DS13701.
BTA26-800CWRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- TOP-3 Insulated
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Alternistor - Snubberless
- Voltage - Off State:
- 800 V
- Current - On State (It (RMS)) (Max):
- 25 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 250A, 260A
- Current - Gate Trigger (Igt) (Max):
- 35 mA
- Current - Hold (Ih) (Max):
- 50 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TOP3
BTA26-800CWRG FAQ
1.How can I place an order for BTA26-800CWRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA26-800CWRG 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 BTA26-800CWRG reliable?
The price and inventory of BTA26-800CWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA26-800CWRG is usually 5 days.
3.What payment methods are accepted for BTA26-800CWRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA26-800CWRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA26-800CWRG?
BTA26-800CWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA26-800CWRG 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 BTA26-800CWRG?
For technical support, including BTA26-800CWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA26-800CWRG requirements.
6.How does Aetrix verify that BTA26-800CWRG is sourced from the original manufacturer or authorized distributors?
All BTA26-800CWRG 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 BTA26-800CWRG meets industry standards.
7.What is the process for return or replacement of BTA26-800CWRG?
All BTA26-800CWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA26-800CWRG, 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 BTA26-800CWRG part is unused and in its original packaging.
Return procedure for BTA26-800CWRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BTA26-800CWRG Tags
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Z0103NN5AA4
STMicroelectronics
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Littelfuse Inc.
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Z0103MNT1G
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2N6073BG
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2N6075BG
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BTA08-600CWRG
STMicroelectronics
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T835H-6G-TR
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