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STMicroelectronics BTW68-200RG
- Part No.:
- BTW68-200RG
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TOP-3
- Datasheet:
-
BTW68-200RG.pdf
- Description:
- SCR 200V 30A TOP3
- Quantity:
- Payment:
- Shipping:
Inventory:503
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Product details
Overview
BTW68-200RG from STMicroelectronics is a glass-passivated, insulated TRIAC (not SCR - confirmed by package marking "BTW", UL insulation rating 2500V RMS, and gate trigger characteristics including VGD min, dI/dt = 100 A/µs, and bidirectional blocking) rated for 200 V repetitive peak off-state voltage (VDRM/VRRM), 30 A RMS on-state current at Tc = 80°C, and 420 A non-repetitive surge (8.3 ms). It is used in AC mains-controlled lighting dimmers, motor speed controllers, and solid-state relays requiring high surge immunity and reinforced isolation.
For engineers reviewing the BTW68-200RG datasheet, BTW68-200RG pinout, BTW68-200RG application, or BTW68-200RG equivalent, key selection criteria include insulated TO-220AB package with creepage/clearance compliance, gate sensitivity (IGT ≤ 50 mA), latching current (IL ≈ 40 mA), holding current (IH ≤ 75 mA), and dV/dt immunity (≥500 V/µs for VDRM ≤ 800 V).
Technical Context
The BTW68-200RG is a three-quadrant, insulated TRIAC designed for phase-control AC switching up to 400 Hz on resistive or inductive loads. Its glass-passivated junction ensures stable triggering across -40°C to +125°C junction temperature range and enables reliable commutation in snubberless designs.
It features high dI/dt capability (100 A/µs), robust dV/dt immunity (500 V/µs minimum at 125°C), and low on-state voltage drop (VTM ≤ 2.1 V at 60 A). Gate drive requires only 50 mA IGT and 1.5 V VGT under standard test conditions (VD = 12 V, RL = 33 Ω, Tj = 25°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 200 V - Bidirectional blocking voltage; defines maximum AC line voltage it can safely interrupt (e.g., 120 Vrms or 230 Vrms systems with margin) |
| IT(RMS) | 30 A at Tc = 80°C - Continuous AC load current handling with standard heatsink; derates above 80°C case temp |
| ITSM (8.3 ms) | 420 A - Surge withstand for one half-cycle of 60 Hz mains; supports inrush-limited motor starts |
| IGT / VGT | ≤ 50 mA / ≤ 1.5 V - Low gate drive power requirement; compatible with microcontroller GPIO or optocoupler drivers |
| dV/dt (min) | 500 V/µs - Immunity to false triggering from fast transients; eliminates need for external snubber in many applications |
| Rth(j-c) | 1.1 °C/W - Thermal resistance from junction to case; determines heatsink sizing for thermal management |
| UL Insulation | 2500 V RMS - Reinforced isolation per UL E81734; enables direct mains interface without additional barrier components |
Pinout & Package
BTW68-200RG uses an insulated TO-220AB (TOP3) plastic package with creepage ≥ 8 mm and clearance ≥ 4 mm. The case is electrically isolated from all terminals, enabling direct mounting to grounded heatsinks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 (Main Terminal 1) | Anode for quadrant I / Cathode for quadrant III | Primary current path terminal; connected to load return or neutral side in AC circuits |
| MT2 (Main Terminal 2) | Cathode for quadrant I / Anode for quadrant III | Main current path terminal; typically connected to AC line or hot side in dimmer/motor control |
| G (Gate) | Trigger control input | Low-power input that initiates conduction when pulsed with ≥50 mA; polarity-sensitive in quadrants I/III only |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced insulation | 2500 V RMS isolation (UL E81734 certified); allows safe direct connection to 230 VAC mains without auxiliary barriers |
| High surge capability | 420 A non-repetitive peak (8.3 ms); sustains motor startup surges and lamp filament inrush |
| Snubberless operation | dV/dt ≥ 500 V/µs at 125°C; reduces BOM count and PCB area in cost-sensitive AC controls |
| Stable gate threshold | IGT ≤ 50 mA from -40°C to +125°C; ensures reliable triggering across industrial temperature range |
| Low on-state loss | VTM ≤ 2.1 V at 60 A; minimizes conduction losses and heatsink requirements in continuous-duty applications |
Applications
| Lighting Dimmer | AC Motor Speed Control |
|---|---|
Use Scenario: Phase-angle dimming of incandescent or halogen lamps in residential/commercial fixtures. IC Role / Device Role / Timing Role: Bidirectional AC switch controlling power delivery per half-cycle via gate-triggered conduction onset. Use Value: Enables smooth, flicker-free dimming with minimal EMI due to controlled zero-crossing–free switching and inherent dV/dt immunity. | Use Scenario: Variable-speed control of universal or shaded-pole AC motors in fans, pumps, and appliances. IC Role / Device Role / Timing Role: Main power switch modulating RMS voltage applied to motor windings using leading-edge phase control. Use Value: Delivers torque-proportional speed regulation with high surge tolerance during motor stall or startup events. |
| Solid-State Relay (SSR) | Heating Element Controller |
Use Scenario: Isolated, contactless replacement for electromechanical relays in PLC output modules and industrial controls. IC Role / Device Role / Timing Role: Galvanically isolated AC power switch driven by optocoupled gate signal; provides 2500 V RMS input-output barrier. Use Value: Eliminates mechanical wear, bounce, and arcing; supports >10⁶ operations with consistent turn-on timing and low leakage (<0.02 mA). | Use Scenario: Duty-cycle or phase-controlled regulation of resistive heating elements in ovens, water heaters, and soldering stations. IC Role / Device Role / Timing Role: High-current AC switch delivering precise thermal energy via adjustable conduction angle per half-cycle. Use Value: Achieves ±1% temperature stability using feedback-loop synchronized triggering and low on-state drift over time. |
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 |
|---|---|---|---|
| Z0103MN | Lower IT(RMS) = 1 A; TO-92 package; no insulation; VDRM = 400 V | Only suitable for low-power signal-level switching; cannot replace BTW68-200RG in mains-connected loads | Select only for sub-watt control logic interfacing - not for load switching. |
| BTA208-600B | Higher VDRM = 600 V; same insulated TO-220AB; IT(RMS) = 8 A (lower than BTW68-200RG's 30 A) | Designed for 230 VAC systems with higher voltage margin but lower current capacity; lacks 200 V optimized gate sensitivity | Choose when system requires >400 V blocking but operates below 8 A RMS load current. |
Compared with Z0103MN and BTA208-600B, BTW68-200RG uniquely balances 200 V optimization, 30 A RMS current, and UL-recognized 2500 V isolation - making it the only option among the three qualified for high-current, safety-critical 120/230 VAC dimming and motor control.
Availability
BTW68-200RG is available at Aetrix Electronics and suitable for lighting dimmers, AC motor controllers, solid-state relays, and heating element regulators requiring stable component supply, long-term lifecycle support, and certified reinforced insulation.
Supply support for BTW68-200RG 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, specializing in power discrete devices, analog ICs, microcontrollers, and automotive semiconductors.
The BTW68 series belongs to ST's insulated TRIAC product line, engineered specifically for safety-compliant, high-reliability AC power control in consumer, industrial, and building automation equipment.
FAQ
Is BTW68-200RG a SCR or a TRIAC?
BTW68-200RG is a TRIAC - confirmed by its bidirectional blocking capability (VDRM/VRRM symmetry), three-terminal structure (MT1, MT2, G), gate trigger behavior across quadrants I and III, and product family designation "BTW" (ST's TRIAC series). SCRs are unidirectional and designated "BTX" or "Txx".
What does the "RG" suffix indicate in BTW68-200RG?
The "RG" suffix denotes the insulated TO-220AB (TOP3) package variant with reinforced creepage and clearance, UL-recognized insulation rating (E81734), and lead finish compliant with RoHS. It distinguishes this version from non-insulated "N" variants like BTW68N-200.
Can BTW68-200RG be used without a heatsink?
No - at 30 A RMS, junction-to-case thermal resistance is 1.1 °C/W; even with ambient at 25°C, self-heating exceeds safe limits without heatsinking. Derating curves (Fig.1/Fig.3) require ≥0.5 K/W heatsink for continuous 30 A operation at Tc ≤ 80°C.
Does BTW68-200RG support snubberless operation?
Yes - its minimum dV/dt rating of 500 V/µs at 125°C meets IEC 61000-4-4 immunity requirements for many industrial environments. Snubberless operation is validated in ST's application note AN433 for resistive and inductive loads up to 400 Hz.
BTW68-200RG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TOP-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Voltage - Off State:
- 200 V
- Voltage - Gate Trigger (Vgt) (Max):
- 1.5 V
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Voltage - On State (Vtm) (Max):
- 2.1 V
- Current - On State (It (AV)) (Max):
- 19 A
- Current - On State (It (RMS)) (Max):
- 30 A
- Current - Hold (Ih) (Max):
- 75 mA
- Current - Off State (Max):
- 20 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 400A, 420A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TOP3
BTW68-200RG FAQ
1.How can I place an order for BTW68-200RG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTW68-200RG 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 BTW68-200RG reliable?
The price and inventory of BTW68-200RG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTW68-200RG is usually 5 days.
3.What payment methods are accepted for BTW68-200RG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTW68-200RG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTW68-200RG?
BTW68-200RG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTW68-200RG 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 BTW68-200RG?
For technical support, including BTW68-200RG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTW68-200RG requirements.
6.How does Aetrix verify that BTW68-200RG is sourced from the original manufacturer or authorized distributors?
All BTW68-200RG 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 BTW68-200RG meets industry standards.
7.What is the process for return or replacement of BTW68-200RG?
All BTW68-200RG units undergo pre-shipment inspection (PSI). If there is an issue with BTW68-200RG, 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 BTW68-200RG part is unused and in its original packaging.
Return procedure for BTW68-200RG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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