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STMicroelectronics BTB24-700BRG
- Part No.:
- BTB24-700BRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTB24-700BRG.pdf
- Description:
- TRIAC 700V 25A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:4,732
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Product details
Overview
BTB24-700BRG from STMicroelectronics is a 25 A RMS, 700 V repetitive peak off-state voltage (VDRM/VRRM), snubberless 3-quadrant triac in TO-220AB uninsulated package, designed for AC mains switching in phase-control and on/off applications requiring high commutation robustness and low thermal resistance. It delivers 50 mA gate trigger current (IGT), 1.3 V gate trigger voltage (VGT), and 500 V/µs minimum dV/dt at 125 °C.
For engineers reviewing the BTB24-700BRG datasheet, BTB24-700BRG pinout, BTB24-700BRG application, or BTB24-700BRG equivalent, this device is selected for high-reliability AC power control where snubberless operation, thermal efficiency (Rth(j-c) ≤ 0.8 °C/W), and UL1557 recognition are critical - especially in motor starting, heating regulation, and light dimming circuits.
Technical Context
This triac operates in three quadrants (I, II, III) with snubberless capability, enabling reliable turn-on without external snubbers under high dV/dt stress (≥500 V/µs at Tj = 125 °C). Its 13 A/ms minimum critical rate of decrease of main current (dI/dt)c supports robust commutation during zero-crossing transitions in inductive loads.
Thermally optimized for case-mounted heatsinking, it achieves 25 A RMS conduction at Tc = 100 °C with junction-to-case thermal resistance ≤ 0.8 °C/W. The TO-220AB uninsulated package allows direct thermal coupling to heatsinks while maintaining 2.5 kV RMS insulation voltage rating for safety compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 25 A - Sustains full-sine-wave AC load current up to 25 A with heatsink at Tc = 100 °C |
| VDRM / VRRM | 700 V - Blocks repetitive peak off-state voltage up to 700 V, suitable for 230 VAC mains with margin |
| IGT (max) | 50 mA - Gate trigger current threshold; enables drive compatibility with standard microcontroller GPIO or optocoupler outputs |
| dV/dt (min) | 500 V/µs - Withstands rapid voltage transients without false triggering, eliminating need for snubber networks |
| Rth(j-c) | 0.8 °C/W - Enables efficient heat transfer to heatsink; limits junction temperature rise to ≤80 °C at 25 A RMS |
| VTM (max) | 1.55 V - On-state voltage drop at 35 A pulse; determines conduction loss (≤55 W peak) and thermal design margin |
| IH (max) | 80 mA - Holding current threshold; ensures stable latching after turn-on even at elevated junction temperatures |
Pinout & Package
BTB24-700BRG uses the TO-220AB uninsulated package: metal tab is electrically connected to MT2 (A2), enabling direct heatsink mounting without insulating hardware. Package meets UL94 V0 flammability and RoHS 2002/95/EC requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate triggering; current flows between A1 and A2; defines polarity for quadrant operation |
| A2 (MT2) | Main Terminal 2 | Electrically tied to metal tab; must be isolated from chassis unless circuit reference permits; carries full load current |
| G | Gate | Controls conduction initiation; requires ≥50 mA pulse (12 V, 33 Ω) for reliable turn-on in quadrants I, II, III |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless 3-quadrant operation | Eliminates external RC snubber components in phase-control designs, reducing BOM count and board space |
| UL1557 recognition (file #81734) | Validated isolation and creepage/clearance performance for safety-critical AC mains interfaces |
| Low Rth(j-c) ≤ 0.8 °C/W | Supports compact thermal design: 25 A RMS achievable with modest heatsink (e.g., 1.5 K/W ambient-to-air) |
| High dI/dt capability (13 A/ms min) | Ensures reliable commutation in inductive motor-starting circuits without false turn-off during current zero crossing |
| RoHS-compliant, halogen-free molding compound | Meets environmental compliance mandates without compromising flame resistance (UL94 V0) |
Applications
| Heating Regulation | Light Dimming |
|---|---|
|
Use Scenario: Precise temperature control in industrial ovens and residential water heaters using phase-angle firing. IC Role / Device Role / Timing Role: Snubberless triac acting as AC mains switch; triggered mid-cycle by zero-crossing synchronized controller to modulate power. Use Value: Eliminates snubber losses and component count while maintaining stable conduction across 0–100% power range at 25 A load. |
Use Scenario: Residential and commercial incandescent/halogen lamp dimming with leading-edge phase-cut control. IC Role / Device Role / Timing Role: Main AC switching element; gate driven by DIAC-triggered RC network or microcontroller-based timing circuit. Use Value: 500 V/µs dV/dt immunity prevents false triggering from line noise, ensuring flicker-free dimming down to 5% brightness. |
| Motor Starting Circuits | Static Relays |
|
Use Scenario: Single-phase induction motor soft-start in HVAC blowers and pump controllers. IC Role / Device Role / Timing Role: High-current AC switch enabling controlled voltage ramp-up via progressive phase-angle advance. Use Value: 13 A/ms (dI/dt)c rating ensures clean commutation during inrush current decay, preventing premature turn-off. |
Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules and building automation systems. IC Role / Device Role / Timing Role: Bidirectional AC switch providing galvanically isolated on/off control of 230 VAC resistive or mildly inductive loads. Use Value: 2.5 kV RMS insulation withstand and UL1557 recognition enable direct integration into safety-rated control panels. |
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 |
|---|---|---|---|
| BTB24-600BRG | 600 V VDRM/VRRM rating; identical 25 A IT(RMS), 50 mA IGT, and TO-220AB uninsulated package | Suitable for 120 VAC or 230 VAC systems with lower transient margin; less derating required in benign environments | Select when system peak line voltage remains ≤650 V and cost optimization is prioritized over 700 V margin |
| BTB24-800BRG | 800 V VDRM/VRRM rating; same 25 A IT(RMS) and 50 mA IGT; otherwise identical electrical and thermal specs | Required for 230 VAC systems exposed to high line surges (e.g., industrial mains with poor regulation or lightning-prone areas) | Select when design must comply with IEC 61000-4-5 Level 4 surge immunity or operate reliably at 277 VAC nominal |
Compared with BTB24-600BRG and BTB24-800BRG, the BTB24-700BRG offers optimal voltage margin for global 230 VAC mains (peak ≈ 325 V) with 115 % safety headroom - balancing surge resilience, thermal efficiency, and cost without over-specifying.
Availability
BTB24-700BRG is available at Aetrix Electronics and suitable for heating regulation, light dimming, motor starting circuits, and static relay designs requiring stable component supply, long-lifecycle support, and UL-certified AC switching performance.
Supply support for BTB24-700BRG 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, mixed-signal, power, and MCU products for industrial, automotive, and consumer markets.
BTB24-700BRG belongs to ST's high-reliability triac product line, engineered specifically for robust AC mains switching in safety-critical and thermally constrained applications - emphasizing snubberless operation, UL recognition, and thermal efficiency.
FAQ
Is BTB24-700BRG compatible with zero-crossing optotriacs like MOC3041?
Yes - BTB24-700BRG is commonly driven by zero-crossing optotriacs such as MOC3041 or IL420. Its 50 mA IGT max and 1.3 V VGT ensure reliable triggering with the typical 15–50 mA LED output of these couplers. Gate resistor selection must limit peak current to ≤4 A per datasheet absolute maximum rating.
What is the maximum allowable case temperature for continuous 25 A RMS operation?
Per DS2112 Figure 2, BTB24-700BRG supports 25 A RMS continuous conduction at Tc = 100 °C for TO-220AB uninsulated packages. Exceeding this requires derating: at Tc = 110 °C, IT(RMS) drops to ~22 A; junction temperature must remain ≤125 °C under all conditions.
Does BTB24-700BRG require a heatsink in all applications?
Yes - sustained 25 A RMS operation demands a heatsink. At 25 A and 1.55 V VTM, conduction loss exceeds 38 W average. Without heatsinking, junction temperature would exceed 125 °C within seconds. Even at 5 A RMS, thermal simulation shows >60 °C rise above ambient without copper area or heatsink.
Can BTB24-700BRG replace BTB24-600BRG in an existing design?
Yes - BTB24-700BRG is a direct drop-in replacement for BTB24-600BRG in the same TO-220AB uninsulated package, with identical pinout, thermal characteristics, and gate drive requirements. The higher 700 V rating improves surge margin without affecting layout, drive circuit, or thermal design.
BTB24-700BRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Triac Type:
- Standard
- Voltage - Off State:
- 700 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
BTB24-700BRG FAQ
1.How can I place an order for BTB24-700BRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTB24-700BRG 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 BTB24-700BRG reliable?
The price and inventory of BTB24-700BRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTB24-700BRG is usually 5 days.
3.What payment methods are accepted for BTB24-700BRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTB24-700BRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTB24-700BRG?
BTB24-700BRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTB24-700BRG 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 BTB24-700BRG?
For technical support, including BTB24-700BRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTB24-700BRG requirements.
6.How does Aetrix verify that BTB24-700BRG is sourced from the original manufacturer or authorized distributors?
All BTB24-700BRG 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 BTB24-700BRG meets industry standards.
7.What is the process for return or replacement of BTB24-700BRG?
All BTB24-700BRG units undergo pre-shipment inspection (PSI). If there is an issue with BTB24-700BRG, 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 BTB24-700BRG part is unused and in its original packaging.
Return procedure for BTB24-700BRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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