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STMicroelectronics BTA26-600BW
- Part No.:
- BTA26-600BW
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TOP-3 Insulated
- Datasheet:
-
BTA26-600BW.pdf
- Description:
- TRIAC ALTERNISTOR 600V 25A TOP3
- Quantity:
- Payment:
- Shipping:
Inventory:9,424
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Product details
Overview
BTA26-600BW from STMicroelectronics is a 25 A, 600 V RMS snubberless triac in TOP3 insulated package, rated for 2500 VRMS insulation and UL 1557 recognition (file 81734). It supports 3-quadrant commutation with 35/50 mA gate trigger current options, low thermal resistance (0.9 °C/W), and high dV/dt immunity (1000 V/µs at 125 °C), enabling robust AC switching in heating regulation and motor speed control.
For engineers reviewing the BTA26-600BW datasheet, BTA26-600BW pinout, BTA26-600BW application, or BTA26-600BW equivalent, key selection criteria include snubberless 3-quadrant operation, insulated tab safety rating, thermal performance under sustained conduction, and compatibility with phase-control gate drive circuits in industrial AC loads.
Technical Context
The BTA26-600BW is a bidirectional thyristor optimized for snubberless 3-quadrant operation, eliminating external snubbers in inductive load switching. Its gate trigger sensitivity (IGT = 35/50 mA) and high critical dI/dt (22 A/ms) ensure reliable turn-on under noisy line conditions and fast current rise.
With 2500 VRMS isolation and UL 1557 recognition, it meets reinforced insulation requirements for static relays and safety-critical AC mains interfaces. The 0.9 °C/W junction-to-case thermal resistance enables 25 A RMS conduction at Tc = 100 °C without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 25 A - Sustained AC load current capability at 100 °C case temperature |
| VDRM / VRRM | 600 V - Peak repetitive off-state blocking voltage for 50/60 Hz mains |
| IGT (Snubberless) | 35 / 50 mA - Gate trigger current range defining compatible driver strength |
| dV/dt (min) | 1000 V/µs @ 125 °C - Immunity to false triggering from rapid voltage transients |
| Rth(j–c) | 0.9 °C/W - Thermal resistance enabling efficient heatsink coupling for high-power dissipation |
| VTM (max) | 1.55 V @ 35 A - On-state voltage drop determining conduction loss and self-heating |
| Insulation Voltage | 2500 VRMS - Reinforced isolation rating for safe mounting on grounded heatsinks |
Pinout & Package
Package: TOP3 insulated (epoxy molded, UL94 V0, lead-free, insulated tab rated 2500 VRMS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | AC load return path; referenced to gate for triggering in quadrants I/III |
| A2 (MT2) | Main Terminal 2 | AC line input or load feed; polarity defines quadrant operation |
| G | Gate | Control terminal accepting pulsed current to initiate conduction in 3 quadrants (I, II, III) |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless 3-quadrant operation | Eliminates need for RC snubber networks in inductive motor and heater loads |
| UL 1557 recognized (file 81734) | Validated reinforced insulation for safety-critical AC mains interface designs |
| Low Rth(j–c) = 0.9 °C/W | Enables 25 A RMS conduction with passive heatsinking at ≤100 °C case temperature |
| High dI/dt immunity (22 A/ms) | Prevents commutation failure during fast current rise in motor starting applications |
| RoHS-compliant TOP3 package | Lead-free, halogen-free epoxy meeting environmental compliance for global manufacturing |
Applications
| Heating Regulation | Light Dimming |
|---|---|
Use Scenario: Precise temperature control in electric ovens and industrial process heaters using phase-angle control. IC Role / Device Role / Timing Role: Bidirectional AC switch triggered mid-cycle to regulate average power delivered to resistive heating elements. Use Value: Snubberless operation reduces component count and improves reliability in thermally demanding enclosures. |
Use Scenario: Mains-powered residential and commercial lighting dimmers with leading-edge phase control. IC Role / Device Role / Timing Role: Main switching element synchronized to zero-crossing detection and gated at variable delay to adjust RMS output. Use Value: High dV/dt immunity prevents false triggering from EMI generated by filament inrush and lamp noise. |
| Induction Motor Starting | Static Relay Replacement |
Use Scenario: Soft-start and on/off control of single-phase induction motors in HVAC blowers and pumps. IC Role / Device Role / Timing Role: Triac-based solid-state relay replacing electromechanical contactors to eliminate arcing and wear. Use Value: 22 A/ms critical dI/dt rating ensures clean turn-on during high-inrush motor startup without commutation failure. |
Use Scenario: Isolated AC switching in programmable logic controller (PLC) output modules and building automation systems. IC Role / Device Role / Timing Role: Reinforced-insulation AC switch providing galvanic isolation between control logic and 230 VAC loads. Use Value: 2500 VRMS insulation rating allows direct mounting to grounded metal chassis without additional barrier materials. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTA26-600BRG | Standard 4-quadrant version with IGT = 50 mA (vs. BW's 35/50 mA snubberless option) | Requires external snubber for inductive loads; less immune to dV/dt-induced false triggering | Select when full 4-quadrant triggering is required and snubber components are acceptable |
| BTB26-600BWRG | Non-insulated TOP3 package (Rth(j–c) = 0.6 °C/W), same electrical specs, no 2500 VRMS isolation | Cannot be mounted directly to grounded heatsinks; requires insulating hardware for safety compliance | Select when thermal performance is prioritized over reinforced insulation and chassis grounding is isolated |
Compared with BTA26-600BRG, the BW variant offers superior snubberless reliability in inductive loads; compared with BTB26-600BWRG, it trades 0.3 °C/W higher thermal resistance for mandatory safety isolation in mains-connected equipment.
Availability
BTA26-600BW 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 and embedded control programs.
Supply support for BTA26-600BW 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, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.
The BTA26 series belongs to ST's high-power triac product line, engineered specifically for robust, snubberless AC switching in safety-certified industrial controls and energy-efficient appliance power stages.
FAQ
What is the maximum allowable case temperature for continuous 25 A RMS operation?
The BTA26-600BW supports 25 A RMS conduction at a maximum case temperature (Tc) of 100 °C, as specified in Absolute Maximum Ratings Table 1. Exceeding this temperature requires derating per Figure 2 in DS13701, and thermal design must account for 0.9 °C/W junction-to-case resistance and heatsink interface losses.
Does BTA26-600BW require a snubber circuit for motor load switching?
No - the BTA26-600BW is a snubberless triac rated for 3-quadrant operation with guaranteed dI/dt immunity up to 22 A/ms and dV/dt immunity up to 1000 V/µs at 125 °C, enabling direct switching of inductive motor loads without external RC snubbers under standard operating conditions.
How is the insulated tab rated, and what safety standards does it meet?
The insulated tab is rated for 2500 VRMS insulation per minute per Table 1 and is UL 1557 recognized (file 81734), satisfying reinforced insulation requirements for basic and supplementary protection in Class I and Class II AC mains equipment per IEC 60730 and IEC 61000-4-5.
Can BTA26-600BW be used in 4-quadrant triggering configurations?
No - the BTA26-600BW is specified only for snubberless 3-quadrant operation (quadrants I, II, III). For 4-quadrant triggering, the BTA26-600BRG variant is required, which has identical voltage/current ratings but different gate sensitivity and snubber dependency per Tables 2 and 3 in DS13701.
BTA26-600BW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- TOP-3 Insulated
- Packaging:
- Tube
- Product Status:
- Obsolete
- Triac Type:
- Alternistor - Snubberless
- Voltage - Off State:
- 600 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):
- 50 mA
- Current - Hold (Ih) (Max):
- 75 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TOP3
BTA26-600BW FAQ
1.How can I place an order for BTA26-600BW through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA26-600BW 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 BTA26-600BW reliable?
The price and inventory of BTA26-600BW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA26-600BW is usually 5 days.
3.What payment methods are accepted for BTA26-600BW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA26-600BW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA26-600BW?
BTA26-600BW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA26-600BW 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 BTA26-600BW?
For technical support, including BTA26-600BW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA26-600BW requirements.
6.How does Aetrix verify that BTA26-600BW is sourced from the original manufacturer or authorized distributors?
All BTA26-600BW 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 BTA26-600BW meets industry standards.
7.What is the process for return or replacement of BTA26-600BW?
All BTA26-600BW units undergo pre-shipment inspection (PSI). If there is an issue with BTA26-600BW, 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 BTA26-600BW part is unused and in its original packaging.
Return procedure for BTA26-600BW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BTA26-600BW Tags
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