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STMicroelectronics BTB24-800CWRG
- Part No.:
- BTB24-800CWRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTB24-800CWRG.pdf
- Description:
- TRIAC ALTERNISTOR 800V 25A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:3,366
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Product details
Overview
BTB24-800CWRG from STMicroelectronics is a snubberless 3-quadrant triac in TO-220AB uninsulated package, rated for 25 A RMS on-state current and 800 V repetitive peak off-state voltage, with 35 mA maximum gate trigger current (IGT), designed for phase-control AC switching in motor speed controllers and light dimmers.
For engineers reviewing the BTB24-800CWRG datasheet, BTB24-800CWRG pinout, BTB24-800CWRG application, or BTB24-800CWRG equivalent, this part supports high-commutation AC loads without external snubbers, offers low thermal resistance (0.8 °C/W junction-to-case), and meets UL1557 recognition and RoHS/ECOPACK2 compliance requirements.
Technical Context
This triac operates in three quadrants (I, II, III) with snubberless capability enabled by high dV/dt immunity (1000 V/µs at Tj = 125 °C) and robust commutation performance (dI/dt ≥ 22 A/ms without snubber). Its gate threshold voltage (VGT ≤ 1.3 V) and low holding current (IH ≤ 75 mA) ensure reliable triggering across temperature.
The device uses a planar passivated silicon structure optimized for high surge tolerance (ITSM = 250 A at 50 Hz, tp = 20 ms) and stable on-state conduction (VTM ≤ 1.55 V at 35 A, 25 °C). Thermal design is supported by validated Rth(j-c) = 0.8 °C/W and UL94 V0 flammability-compliant epoxy molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 25 A - Sustains continuous AC load current up to 25 A at case temperature ≤ 100 °C without derating. |
| VDRM / VRRM | 800 V - Blocks 800 V repetitive peak off-state voltage in both directions, suitable for 230 VAC mains with safety margin. |
| IGT (max) | 35 mA - Requires ≤ 35 mA gate drive for reliable turn-on under worst-case conditions (Tj = 125 °C, quadrant I–III). |
| dV/dt (min) | 1000 V/µs - Immune to rapid voltage transients without false triggering, eliminating need for snubber networks. |
| (dI/dt)c (min) | 22 A/ms - Supports fast current rise during turn-on without commutation failure in inductive loads. |
| Rth(j-c) | 0.8 °C/W - Enables efficient heat transfer to heatsink; allows 25 A operation with ≤ 20 °C temperature rise across junction-to-case path. |
| VTM (max) | 1.55 V - Low on-state voltage drop at 35 A pulse reduces conduction losses and self-heating during transient loads. |
Pinout & Package
BTB24-800CWRG uses the TO-220AB uninsulated package: metal tab is electrically connected to MT2 (A2), requiring isolation from heatsink unless referenced to A2 potential. Package outline conforms to ST's mechanical drawing DS2112 Rev 13, page 6/14.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate drive; current flows between A1 and A2; defines polarity for quadrant operation. |
| A2 (MT2) | Main Terminal 2 | Connected to metal tab; must be isolated from heatsink unless system ground or load return is tied to A2. |
| G | Gate | Controls conduction onset; triggers in quadrants I, II, III only; requires ≤ 35 mA pulse with 12 V drive into 33 Ω load. |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless 3-quadrant operation | Enables direct AC switching in phase-control circuits without RC snubber components, reducing BOM count and board space. |
| UL1557 recognition (file #81734) | Validated insulation and creepage/clearance compliance for safety-critical industrial and appliance applications. |
| Low Rth(j-c) = 0.8 °C/W | Permits higher sustained current in compact thermal designs; supports 25 A RMS with modest heatsinking at TC ≤ 100 °C. |
| ECOPACK2 / RoHS / Halogen-free | Meets global environmental regulations including EU RoHS 2002/95/EC and halogen-free packaging standards. |
| High dI/dt immunity (22 A/ms) | Ensures reliable turn-on into highly inductive loads (e.g., induction motors) without commutation failure. |
Applications
| Light Dimming Systems | Motor Speed Control |
|---|---|
|
Use Scenario: Phase-angle control of incandescent/halogen lamps in residential and commercial lighting. IC Role / Device Role / Timing Role: Main AC power switch modulating RMS voltage delivered to lamp filament via gate-triggered conduction angle adjustment. Use Value: Eliminates need for external snubber due to 1000 V/µs dV/dt rating, simplifying EMI filtering and improving reliability over life. |
Use Scenario: Variable-speed control of single-phase universal or shaded-pole motors in fans, pumps, and power tools. IC Role / Device Role / Timing Role: Bidirectional AC switch synchronized to zero-crossing or phase-shifted gate pulses to regulate torque and speed. Use Value: 22 A/ms critical dI/dt rating ensures clean turn-on into motor inductance, preventing misfiring and audible noise. |
| Heating Regulation | Static Relay Replacement |
|
Use Scenario: Duty-cycle or phase-control regulation of resistive heating elements in ovens, water heaters, and industrial process equipment. IC Role / Device Role / Timing Role: High-current AC switch delivering precise thermal energy by controlling conduction time per half-cycle. Use Value: 25 A RMS rating and 0.8 °C/W thermal resistance support continuous operation at full load without forced cooling. |
Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules and industrial control panels. IC Role / Device Role / Timing Role: Fail-safe AC load switch with galvanically isolated gate drive, enabling silent, bounce-free, long-life switching. Use Value: UL1557 recognition and 2.5 kV insulation withstand voltage provide certified isolation for functional safety compliance. |
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 |
|---|---|---|---|
| BTB24-800BWRG | Standard 4-quadrant version with 50 mA max IGT; lower dV/dt (500 V/µs); no snubberless optimization. | Supports full 4Q triggering but requires external snubber in noisy inductive environments. | Select when gate drive margin is ample and legacy 4Q compatibility is required over dV/dt immunity. |
| T2535-800G | D²PAK surface-mount package; identical 35 mA IGT and 1000 V/µs dV/dt; Rth(j-c) = 0.8 °C/W same, but Rth(j-a) lower (45 °C/W typical). | Suitable for automated SMT assembly; requires PCB copper area for thermal management instead of mechanical heatsink. | Select for space-constrained, reflow-soldered designs where TO-220 mounting is impractical. |
Compared with BTB24-800BWRG, BTB24-800CWRG delivers superior noise immunity and snubberless operation; compared with T2535-800G, it offers through-hole mechanical robustness and simplified thermal interface, though requiring heatsink mounting.
Availability
BTB24-800CWRG is available at Aetrix Electronics and suitable for light dimming systems, motor speed controllers, heating regulation circuits, and static relay replacements requiring stable component supply and long-term industrial availability.
Supply support for BTB24-800CWRG 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
BTB24-800CWRG belongs to ST's high-reliability power discrete triac family, engineered specifically for robust, snubberless AC phase-control in cost-sensitive industrial and appliance applications.
FAQ
Is BTB24-800CWRG compatible with zero-crossing trigger circuits?
No - BTB24-800CWRG is a 3-quadrant snubberless triac optimized for phase-angle control, not zero-crossing switching. Its gate trigger characteristics (IGT ≤ 35 mA, VGT ≤ 1.3 V) and quadrant limitations (no quadrant IV conduction) make it unsuitable for zero-crossing drivers that require full 4Q sensitivity and precise timing near voltage zero.
What is the maximum allowable case temperature for continuous 25 A RMS operation?
The absolute maximum case temperature for continuous 25 A RMS operation is 100 °C, as specified in Table 1 (IT(RMS) rating condition). Exceeding this temperature requires derating per Figure 2 in DS2112 Rev 13; at TC = 125 °C, RMS current must be reduced to approximately 18 A.
Does the metal tab of BTB24-800CWRG connect to a specific terminal?
Yes - the metal tab is electrically connected to A2 (MT2) in the TO-220AB uninsulated package. This requires electrical isolation from the heatsink unless the heatsink is referenced to the A2 potential, or use of an insulating washer and shoulder washer kit to maintain safe creepage distance.
Can BTB24-800CWRG replace BTB24-800BWRG without circuit modification?
No - although both share the same voltage/current ratings, BTB24-800CWRG has lower IGT (35 mA vs. 50 mA) and higher dV/dt immunity (1000 V/µs vs. 500 V/µs), but lacks quadrant IV triggering. Gate drive circuitry must be verified for reduced IGT margin, and applications relying on 4Q operation will fail.
BTB24-800CWRG 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):
- 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:
- TO-220
BTB24-800CWRG FAQ
1.How can I place an order for BTB24-800CWRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTB24-800CWRG 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 BTB24-800CWRG reliable?
The price and inventory of BTB24-800CWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTB24-800CWRG is usually 5 days.
3.What payment methods are accepted for BTB24-800CWRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTB24-800CWRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTB24-800CWRG?
BTB24-800CWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTB24-800CWRG 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 BTB24-800CWRG?
For technical support, including BTB24-800CWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTB24-800CWRG requirements.
6.How does Aetrix verify that BTB24-800CWRG is sourced from the original manufacturer or authorized distributors?
All BTB24-800CWRG 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 BTB24-800CWRG meets industry standards.
7.What is the process for return or replacement of BTB24-800CWRG?
All BTB24-800CWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTB24-800CWRG, 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 BTB24-800CWRG part is unused and in its original packaging.
Return procedure for BTB24-800CWRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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