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STMicroelectronics BTB24-800BWRG
- Part No.:
- BTB24-800BWRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTB24-800BWRG.pdf
- Description:
- TRIAC ALTERNISTOR 800V 25A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:136
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Product details
Overview
BTB24-800BWRG from STMicroelectronics is a 25 A RMS, 800 V repetitive peak off-state voltage snubberless triac in TO-220AB uninsulated package, rated for 4-quadrant triggering with 50 mA gate trigger current (IGT), designed for phase control in motor speed controllers and on/off switching in static relays.
For engineers reviewing the BTB24-800BWRG datasheet, BTB24-800BWRG pinout, BTB24-800BWRG application, or BTB24-800BWRG equivalent, key selection criteria include commutation robustness at 125 °C, dV/dt immunity ≥500 V/µs, low thermal resistance (Rth(j-c) = 0.8 °C/W), and UL1557 recognition for safety-critical AC power control.
Technical Context
This triac operates in all four quadrants with guaranteed IGT ≤50 mA across polarities, enabling reliable triggering without external snubbers under high dV/dt stress. Its 125 °C maximum junction temperature and 50 A/µs critical rate of rise of on-state current support high-reliability industrial AC switching.
Designed for direct mounting to heatsinks via insulated or uninsulated TO-220AB packages, it delivers stable 25 A RMS conduction with low on-state voltage (VTM ≤1.55 V at 35 A, 25 °C) and high surge tolerance (ITSM = 250 A at 50 Hz, 20 ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 25 A - Sustains continuous AC load current without derating at Tc = 100 °C |
| VDRM / VRRM | 800 V - Blocks 800 V peak reverse/repetitive off-state voltage in AC mains applications |
| IGT (Quadrant IV) | 100 mA max - Higher gate drive requirement in quadrant IV ensures noise-immune turn-on |
| dV/dt (min) | 500 V/µs - Resists false triggering from fast transients in noisy industrial environments |
| Rth(j-c) | 0.8 °C/W - Enables efficient heat transfer to heatsink for compact thermal design |
| VTM | ≤1.55 V at 35 A - Low conduction loss reduces power dissipation and thermal stress |
| IDRM / IRRM | ≤5 µA at 25 °C - Minimal leakage ensures stable off-state isolation in high-impedance circuits |
Pinout & Package
BTB24-800BWRG uses a TO-220AB uninsulated package with metal tab electrically connected to MT2 (A2). The package features 3 leads: MT1 (A1), MT2 (A2), and Gate (G), optimized for through-hole mounting and direct heatsink attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Current return path; referenced to A2 for gate trigger polarity definition |
| A2 (MT2) | Main Terminal 2 | Electrically tied to metal tab; serves as heatsink interface and circuit reference |
| G | Gate | Controls conduction onset; requires ≤50 mA pulse for reliable 4-quadrant turn-on |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless 4-quadrant operation | Eliminates need for external RC snubber networks in phase-control designs, reducing BOM count and board space |
| UL1557 recognition | Validated insulation system enables use in safety-critical AC mains-connected equipment without additional certification burden |
| Low Rth(j-c) = 0.8 °C/W | Supports full 25 A RMS rating with modest heatsinking, lowering thermal management cost |
| High dI/dt capability (13 A/ms) | Prevents commutation failure during rapid current rise in inductive motor loads |
| RoHS & ECOPACK2 compliance | Halogen-free molding compound and lead-free plating meet global environmental regulations for industrial manufacturing |
Applications
| Heating Regulation | Light Dimming |
|---|---|
Use Scenario: Precise temperature control in commercial ovens using zero-crossing or phase-angle firing. IC Role / Device Role / Timing Role: Main AC power switch regulating RMS power delivered to resistive heating elements. Use Value: 800 V VDRM withstands line surges; 25 A IT(RMS) supports up to 5.5 kW at 230 VAC. | Use Scenario: Smooth brightness adjustment in residential and commercial LED-compatible dimmers. IC Role / Device Role / Timing Role: Phase-controlled AC switch synchronizing conduction angle with line voltage zero crossings. Use Value: 500 V/µs dV/dt immunity prevents false triggering from EMI in shared lighting circuits. |
| Induction Motor Starting | Static Relay Replacement |
Use Scenario: Solid-state soft-start for single-phase induction motors in HVAC blowers and pumps. IC Role / Device Role / Timing Role: High-current AC switch enabling controlled ramp-up of motor voltage and current. Use Value: 250 A non-repetitive surge rating handles locked-rotor inrush without failure. | Use Scenario: Contactless replacement of electromechanical relays in PLC output modules and industrial controllers. IC Role / Device Role / Timing Role: Isolation-integrated power switch providing galvanic separation and long-life switching. Use Value: UL1557 recognition validates safe operation in Class 2 circuits per NEC Article 725. |
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 |
|---|---|---|---|
| BTB24-800BRG | Same electrical specs but supplied in bulk (not tube); no "W" suffix indicates standard packing mode | No functional difference; differs only in packaging format and reel/tube logistics | Select BRG for high-volume automated assembly where tube packaging is unnecessary |
| BTA24-800BWRG | Identical ratings but TO-220AB insulated package; includes internal isolation barrier between tab and MT2 | Required where creepage/clearance standards mandate reinforced insulation between heatsink and circuit | Choose BTA24-800BWRG when mounting to conductive chassis or shared heatsinks with other voltage domains |
Compared with BTB24-800BRG and BTA24-800BWRG, the BTB24-800BWRG offers identical electrical performance in an uninsulated TO-220AB package optimized for direct thermal coupling-ideal when mechanical isolation is handled externally and cost-sensitive volume production demands tube packaging.
Availability
BTB24-800BWRG 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 BTB24-800BWRG 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The BTB24 series belongs to ST's high-power discrete triac product line, engineered specifically for robust, snubberless AC power control in harsh industrial environments with stringent thermal and reliability requirements.
FAQ
What is the maximum junction temperature for BTB24-800BWRG?
The absolute maximum operating junction temperature (Tj) is +125 °C, validated across all electrical parameters in the datasheet. Operation beyond this limit risks irreversible degradation of gate sensitivity and on-state voltage stability. Thermal design must ensure Tj remains ≤125 °C under worst-case ambient and load conditions.
Is BTB24-800BWRG compatible with zero-crossing trigger circuits?
Yes - its 4-quadrant triggering capability (including reliable quadrant IV turn-on) allows seamless integration with zero-crossing optocouplers like MOC3041 or IL420. Gate trigger current remains ≤100 mA even at 125 °C, ensuring consistent activation timing near voltage zero crossings.
Does BTB24-800BWRG require a heatsink in all applications?
A heatsink is mandatory for continuous 25 A RMS operation: Rth(j-c) = 0.8 °C/W implies ~20 W power dissipation at full load, requiring thermal resistance from junction to ambient ≤2.5 °C/W. For intermittent loads <5 A RMS, natural convection may suffice, but thermal simulation is recommended.
What does the "W" in BTB24-800BWRG signify?
The "W" denotes snubberless configuration - specifically, enhanced commutation capability in quadrants I, II, and III (dI/dt ≥13 A/ms, dV/dt ≥500 V/µs), enabling reliable turn-off without external snubber networks. It is not a package or packing code, and appears only in snubberless variants (BW/CW), not standard (B/C) versions.
BTB24-800BWRG 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):
- 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:
- TO-220
BTB24-800BWRG FAQ
1.How can I place an order for BTB24-800BWRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTB24-800BWRG 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 BTB24-800BWRG reliable?
The price and inventory of BTB24-800BWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTB24-800BWRG is usually 5 days.
3.What payment methods are accepted for BTB24-800BWRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTB24-800BWRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTB24-800BWRG?
BTB24-800BWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTB24-800BWRG 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 BTB24-800BWRG?
For technical support, including BTB24-800BWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTB24-800BWRG requirements.
6.How does Aetrix verify that BTB24-800BWRG is sourced from the original manufacturer or authorized distributors?
All BTB24-800BWRG 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 BTB24-800BWRG meets industry standards.
7.What is the process for return or replacement of BTB24-800BWRG?
All BTB24-800BWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTB24-800BWRG, 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 BTB24-800BWRG part is unused and in its original packaging.
Return procedure for BTB24-800BWRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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