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STMicroelectronics BTB24-800BRG
- Part No.:
- BTB24-800BRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTB24-800BRG.pdf
- Description:
- TRIAC 800V 25A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:798
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Product details
Overview
BTB24-800BRG from STMicroelectronics is a 25 A RMS, 800 V repetitive peak off-state voltage (VDRM), standard 4-quadrant Triac in TO-220AB uninsulated package, designed for AC mains switching in phase-control and on/off applications including motor speed control and heating regulation. It features 50 mA maximum gate trigger current (IGT), 80 mA latching current (IL) in quadrant II, and 500 V/µs minimum critical rate of rise of off-state voltage (dV/dt) at 125 °C.
For engineers reviewing the BTB24-800BRG datasheet, BTB24-800BRG pinout, BTB24-800BRG application, or BTB24-800BRG equivalent, key selection criteria include its non-insulated TO-220AB thermal performance (Rth(j-c) = 0.8 °C/W), 4-quadrant triggering capability, snubberless operation not supported (standard variant), and compatibility with zero-crossing or random-phase control circuits requiring robust commutation at 50/60 Hz.
Technical Context
This Triac operates as a bidirectional semiconductor switch enabling full-wave AC conduction controlled by gate signal polarity and timing. Its 4-quadrant triggering supports gate drive in all combinations of A2–A1 voltage and gate–A1 current polarity, simplifying driver design in universal AC control systems.
With 250 A non-repetitive surge current (ITSM at 50 Hz, 20 ms), 1.55 V max on-state voltage (VTM at 35 A, 25 °C), and 16 mΩ dynamic resistance (RD), it delivers low conduction loss and high thermal efficiency under sustained load. Junction-to-case thermal resistance of 0.8 °C/W enables direct heatsink mounting without isolation washers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 25 A - Sustained AC load current capacity at Tc = 100 °C, suitable for 3 kW resistive loads at 230 VAC. |
| VDRM / VRRM | 800 V - Repetitive peak blocking voltage, enabling use in 400 VAC industrial systems with margin against transients. |
| IGT (max) | 50 mA - Maximum gate trigger current required in all four quadrants, defining minimum driver strength needed. |
| dV/dt (min) | 500 V/µs - Minimum off-state voltage rise rate immunity at 125 °C, ensuring reliable turn-off without false triggering. |
| Rth(j-c) | 0.8 °C/W - Junction-to-case thermal resistance, allowing >30 W power dissipation with 24 °C/W heatsink (ΔT = 25 °C). |
| IL (quadrant II) | 160 mA - Maximum latching current in quadrant II, impacting minimum load current before self-sustaining conduction. |
| VGT (max) | 1.3 V - Maximum gate trigger voltage, defining low-voltage compatibility with microcontroller GPIO or optocoupler outputs. |
Pinout & Package
BTB24-800BRG uses the TO-220AB package (uninsulated, metal tab electrically connected to A2), optimized for mechanical mounting and thermal transfer to heatsinks. The tab must be isolated from chassis if A2 is not at ground potential.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main terminal 1 (anode 1) | Reference terminal for gate drive; current flows between A1 and A2 when triggered; tied to load return in most configurations. |
| A2 | Main terminal 2 (anode 2) | Electrically connected to metal tab; serves as high-side AC line connection or heatsink interface; requires insulation if chassis-grounded. |
| G | Gate | Control input; triggers conduction when voltage ≥ VGT and current ≥ IGT in any quadrant; referenced to A1. |
Key Features
| Feature | Design Value |
|---|---|
| 4-quadrant triggering | Enables gate control with either polarity of A2–A1 voltage and gate–A1 current, eliminating need for external polarity management circuitry. |
| UL1557 recognition | File #81734 confirms compliance with reinforced insulation standards for solid-state relays and safety-critical AC switching. |
| RoHS & ECOPACK2 | Halogen-free molding compound and lead-free terminations meet EU environmental directives and IPC/JEDEC moisture sensitivity level 1. |
| High dI/dt immunity | 13 A/ms minimum critical rate of decrease of main current ensures stable commutation during inductive load turn-off without snubber networks. |
Applications
| Heating Regulation | Light Dimming |
|---|---|
|
Use Scenario: Precise temperature control in electric ovens, soldering irons, and HVAC duct heaters using phase-angle modulation. IC Role / Device Role / Timing Role: Main AC power switch executing phase-controlled conduction windows synchronized to zero-crossing detection. Use Value: Delivers smooth 0–100% power adjustment with <1.55 V on-state drop, minimizing heater coil self-heating and improving thermal response accuracy. |
Use Scenario: Residential and commercial incandescent/halogen lamp dimming with leading-edge phase-cut waveforms. IC Role / Device Role / Timing Role: Bidirectional AC switch triggered by TRIAC driver IC (e.g., MOC302x) to chop each half-cycle. Use Value: 500 V/µs dV/dt rating prevents false turn-on from EMI or line noise, ensuring flicker-free dimming across wide input voltage ranges. |
| Induction Motor Starting | Static Relay Replacement |
|
Use Scenario: Solid-state soft-start for single-phase induction motors in pumps, compressors, and fans. IC Role / Device Role / Timing Role: High-current AC switch enabling ramped voltage application via progressive phase-angle advance. Use Value: 250 A surge rating (50 Hz, 20 ms) withstands locked-rotor inrush, while 25 A RMS rating sustains continuous run current without derating. |
Use Scenario: Contactless replacement of electromechanical relays in PLC output modules and industrial control panels. IC Role / Device Role / Timing Role: Isolation-integrated AC power switch driven by optocoupled logic, providing silent, bounce-free switching. Use Value: UL1557 recognition validates reinforced insulation integrity, supporting functional safety requirements up to CAT III 300 V environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-quadrant Triac applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTA24-800BWRG | TO-220AB insulated package; Rth(j-c) = 1.7 °C/W vs. 0.8 °C/W; same electrical specs. | Eliminates need for insulating washer when mounting to grounded heatsinks. | Select when chassis grounding mandates galvanic isolation between A2 and heatsink. |
| T2535-800G | D²PAK surface-mount package; 35 mA IGT (snubberless 3Q); lower IT(RMS) derating above 75 °C ambient. | Enables automated PCB assembly but requires larger copper area (≥25 cm²) for thermal management. | Select for space-constrained, reflow-soldered designs where board-level isolation suffices. |
Compared with BTA24-800BWRG, BTB24-800BRG offers superior thermal performance for high-power density layouts; compared with T2535-800G, it provides higher surge robustness and simpler thermal design, though requiring through-hole assembly.
Availability
BTB24-800BRG 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 BTB24-800BRG 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, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.
BTB24-800BRG belongs to ST's high-reliability power discrete portfolio, engineered specifically for rugged AC mains switching in industrial controls, home appliances, and building automation systems.
FAQ
Is BTB24-800BRG suitable for snubberless operation?
No. BTB24-800BRG is a standard 4-quadrant Triac with 50 mA IGT and 500 V/µs dV/dt rating; it requires external snubbers in highly inductive loads. Snubberless variants (e.g., BTB24-800BW) specify 1000 V/µs dV/dt and 35 mA IGT, confirmed in Table 2 of DS2112 Rev 13.
What is the maximum allowable case temperature for continuous 25 A RMS operation?
Per Figure 2 in DS2112 Rev 13, BTB24-800BRG supports 25 A RMS at TC = 100 °C for TO-220AB packages. Exceeding this requires linear derating: e.g., 20 A RMS at TC = 125 °C. Junction temperature must remain ≤125 °C under all conditions.
Can the metal tab (A2) be directly mounted to a grounded heatsink?
Yes - BTB24-800BRG uses an uninsulated TO-220AB package where the tab is electrically connected to A2. Direct mounting is permitted only if A2 is referenced to system ground or isolated from user-accessible conductors per IEC 61000-4-5 and UL1557 requirements.
How does BTB24-800BRG differ from BTA24-800BWRG beyond insulation?
Both share identical electrical ratings (25 A, 800 V, 50 mA IGT), but BTA24-800BWRG has insulated packaging (Rth(j-c) = 1.7 °C/W) and higher creepage/clearance. BTB24-800BRG offers lower thermal resistance (0.8 °C/W) and reduced cost, requiring external insulation when A2 is not at ground potential.
BTB24-800BRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Standard
- 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):
- 80 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
BTB24-800BRG FAQ
1.How can I place an order for BTB24-800BRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTB24-800BRG 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 BTB24-800BRG reliable?
The price and inventory of BTB24-800BRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTB24-800BRG is usually 5 days.
3.What payment methods are accepted for BTB24-800BRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTB24-800BRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTB24-800BRG?
BTB24-800BRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTB24-800BRG 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 BTB24-800BRG?
For technical support, including BTB24-800BRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTB24-800BRG requirements.
6.How does Aetrix verify that BTB24-800BRG is sourced from the original manufacturer or authorized distributors?
All BTB24-800BRG 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 BTB24-800BRG meets industry standards.
7.What is the process for return or replacement of BTB24-800BRG?
All BTB24-800BRG units undergo pre-shipment inspection (PSI). If there is an issue with BTB24-800BRG, 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 BTB24-800BRG part is unused and in its original packaging.
Return procedure for BTB24-800BRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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