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STMicroelectronics BTA24-600CW
- Part No.:
- BTA24-600CW
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTA24-600CW.pdf
- Description:
- TRIAC ALTERNISTOR 600V 25A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:7,898
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Product details
Overview
BTA24-600CW from STMicroelectronics is a snubberless 3-quadrant triac in TO-220AB insulated package, rated for 25 A RMS on-state current and 600 V repetitive peak off-state voltage, with 35 mA maximum gate trigger current (IGT), designed for phase-controlled AC switching in lighting dimmers and motor speed controllers.
For engineers reviewing the BTA24-600CW datasheet, BTA24-600CW pinout, BTA24-600CW application, or BTA24-600CW equivalent, this device supports high commutation capability without external snubbers, delivers low thermal resistance (Rth(j-c) = 1.7 °C/W), and meets UL1557 recognition and RoHS/ECOPACK2 compliance for industrial-grade reliability.
Technical Context
The BTA24-600CW operates as a 3-quadrant snubberless triac, enabling robust turn-on in quadrants I, II, and III while suppressing false triggering in quadrant IV. Its dV/dt immunity exceeds 500 V/µs at 125 °C and critical rate of rise of on-state current (dl/dt) is rated at 50 A/µs under specified gate drive conditions.
Thermal performance is defined by junction-to-case resistance of 1.7 °C/W (insulated TO-220AB), supporting stable operation up to 125 °C junction temperature. The device features low on-state voltage (VTM ≤ 1.55 V at 35 A, 25 °C) and dynamic resistance (RD ≤ 16 mΩ), minimizing conduction losses in high-current AC loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RMS on-state current (IT(RMS)) | 25 A - Sustains continuous AC load current without derating at Tc = 75 °C |
| Repetitive peak off-state voltage (VDRM) | 600 V - Blocks line-voltage transients in 230 VAC systems with safety margin |
| Gate trigger current (IGT) | 35 mA max - Low drive requirement compatible with microcontroller GPIO or optocoupler outputs |
| Critical dl/dt | 50 A/µs - Ensures reliable turn-on under fast-rising load currents without false commutation |
| dV/dt immunity | 500 V/µs min at 125 °C - Eliminates need for snubber networks in most phase-control designs |
| Junction-to-case thermal resistance (Rth(j-c)) | 1.7 °C/W - Enables efficient heat transfer to heatsink in insulated mounting configuration |
| Insulation voltage (VINS) | 2.5 kV RMS (1 min) - Supports reinforced insulation for mains-connected equipment per IEC/UL standards |
Pinout & Package
Package: TO-220AB insulated - thermally and electrically isolated tab with UL94 V0 flammability-rated resin, lead-free plating, and 0.55 N·m recommended mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main terminal 1 | Reference electrode for gate trigger; connected to load return or neutral in AC circuits |
| A2 (MT2) | Main terminal 2 | High-side AC line connection; carries full load current and defines voltage polarity reference |
| G | Gate | Control input for triggering conduction; requires ≥35 mA pulse to initiate turn-on in quadrants I/II/III |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless 3-quadrant operation | Eliminates external RC snubber components in phase-control applications, reducing BOM count and PCB area |
| UL1557 recognition | Validated isolation and creepage/clearance compliance for safety-critical AC mains interfaces |
| Low thermal resistance (insulated) | 1.7 °C/W junction-to-case enables compact heatsink design without thermal derating penalties |
| High commutation capability | Supports reliable turn-off under inductive loads (e.g., motors) without forced commutation circuitry |
| ECOPACK2 / RoHS / Halogen-free | Fully compliant with environmental regulations and modern manufacturing requirements including lead-free soldering |
Applications
| Light Dimming Systems | Induction Motor Starters |
|---|---|
|
Use Scenario: Phase-angle control of incandescent/halogen lamps in residential and commercial lighting. IC Role / Device Role / Timing Role: Main AC power switch triggered synchronously with zero-crossing detection to regulate RMS voltage delivered to lamp filament. Use Value: Enables smooth, flicker-free dimming with no snubber components required due to 500 V/µs dV/dt immunity and 35 mA low IGT. |
Use Scenario: Solid-state replacement for electromechanical contactors in HVAC blower and pump motor starting circuits. IC Role / Device Role / Timing Role: High-current AC switch providing inrush current limiting and controlled start-up via soft-start timing logic. Use Value: Delivers 25 A RMS switching with 260 A non-repetitive surge tolerance, eliminating contact wear and arcing failures. |
| Heating Element Regulators | Static Relay Modules |
|
Use Scenario: On/off or phase-control regulation of resistive heating elements in industrial ovens and water heaters. IC Role / Device Role / Timing Role: Primary power semiconductor executing duty-cycle or phase-angle modulation based on PID temperature feedback. Use Value: Maintains stable thermal output with low on-state loss (VTM ≤ 1.55 V) and high thermal reliability (Tj up to 125 °C). |
Use Scenario: Isolated AC output stage in programmable logic controller (PLC) digital output modules. IC Role / Device Role / Timing Role: Reinforced-insulation AC switch interfacing microcontroller I/O through optocoupled gate driver. Use Value: 2.5 kV RMS insulation rating and UL1557 recognition ensure safe, certified separation between control and power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTB24-600CW | TO-220AB uninsulated package; Rth(j-c) = 0.8 °C/W; no internal insulation barrier | Requires electrically isolated heatsink mounting; unsuitable where reinforced insulation is mandated | Select when thermal performance is prioritized over safety isolation and board layout permits isolated heatsink design |
| T2535-600G | D²PAK surface-mount package; same 35 mA IGT and 600 V rating; Rth(j-c) = 0.8 °C/W | Enables automated assembly and higher power density; lacks screw-mount mechanical stability of TO-220AB | Select for space-constrained, reflow-soldered designs where thermal interface to PCB copper is optimized |
Compared with BTB24-600CW and T2535-600G, the BTA24-600CW uniquely combines reinforced insulation (2.5 kV), UL1557 recognition, and TO-220AB mechanical robustness-making it optimal for safety-certified, field-serviceable AC control modules requiring manual heatsink attachment.
Availability
BTA24-600CW is available at Aetrix Electronics and suitable for light dimming systems, induction motor starters, heating element regulators, and static relay modules requiring stable component supply across industrial OEM production cycles.
Supply support for BTA24-600CW 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, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The BTA24 series belongs to ST's high-power discrete triac product line, engineered specifically for robust, snubberless AC switching in safety-critical and thermally demanding industrial control applications.
FAQ
What is the maximum junction temperature for continuous operation of BTA24-600CW?
The BTA24-600CW has an operating junction temperature range of –40 °C to +125 °C. Continuous operation must maintain Tj ≤ 125 °C, achievable with proper heatsinking given its 1.7 °C/W junction-to-case thermal resistance and 75 °C case temperature limit per datasheet absolute ratings.
Does BTA24-600CW require a snubber circuit in phase-control applications?
No-BTA24-600CW is a snubberless 3-quadrant triac with minimum dV/dt immunity of 500 V/µs at 125 °C, validated for direct use in light dimmers and motor speed controllers without external RC snubbers under typical line conditions and load inductance.
How does the insulated TO-220AB package affect mounting and thermal design?
The insulated TO-220AB package incorporates a dielectric barrier between the metal tab and semiconductor die, enabling direct mounting to grounded heatsinks without electrical isolation hardware. Thermal resistance is 1.7 °C/W, requiring torque of 0.55 N·m for optimal thermal contact per ST's mechanical specifications.
Can BTA24-600CW replace standard 4-quadrant triacs like BTB24-600B?
BTA24-600CW is not a drop-in replacement for 4-quadrant devices: it operates only in quadrants I, II, and III and lacks quadrant IV triggering. Use it where snubberless 3Q operation suffices; select BTB24-600B only if full 4Q control (e.g., for certain AC motor braking) is required.
BTA24-600CW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- TO-220-3
- 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):
- 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
BTA24-600CW FAQ
1.How can I place an order for BTA24-600CW through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA24-600CW 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 BTA24-600CW reliable?
The price and inventory of BTA24-600CW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA24-600CW is usually 5 days.
3.What payment methods are accepted for BTA24-600CW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA24-600CW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA24-600CW?
BTA24-600CW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA24-600CW 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 BTA24-600CW?
For technical support, including BTA24-600CW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA24-600CW requirements.
6.How does Aetrix verify that BTA24-600CW is sourced from the original manufacturer or authorized distributors?
All BTA24-600CW 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 BTA24-600CW meets industry standards.
7.What is the process for return or replacement of BTA24-600CW?
All BTA24-600CW units undergo pre-shipment inspection (PSI). If there is an issue with BTA24-600CW, 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 BTA24-600CW part is unused and in its original packaging.
Return procedure for BTA24-600CW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BTA24-600CW Tags
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STMicroelectronics
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