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STMicroelectronics BTW67-1000
- Part No.:
- BTW67-1000
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- RD-91
- Datasheet:
-
BTW67-1000.pdf
- Description:
- SCR 1KV 50A RD91
- Quantity:
- Payment:
- Shipping:
Inventory:1,093
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Product details
Overview
BTW67-1000 from STMicroelectronics is a 50 A RMS, 1000 V blocking voltage SCR thyristor in an insulated RD91 package, designed for high-power AC switching in solid-state relays, welding equipment, and motor control circuits. It features 610 A non-repetitive surge current capability, 1.0 °C/W junction-to-case thermal resistance, and 2500 VRMS insulation rating per UL 1557.
For engineers reviewing the BTW67-1000 datasheet, BTW67-1000 pinout, BTW67-1000 application, or BTW67-1000 equivalent, key selection criteria include commutation robustness (dV/dt ≥ 1000 V/µs at 125 °C), low on-state voltage (≤1.9 V at 100 A), gate trigger sensitivity (8–80 mA), and clip-bonded thermal performance for sustained high-current operation.
Technical Context
This SCR operates as a latching unidirectional power switch triggered by a gate pulse, requiring zero-crossing or phase-controlled AC gate drive. Its 125 °C maximum junction temperature, 1.0 °C/W thermal resistance, and 1680 A²s I²t rating support high-duty-cycle industrial switching with minimal heatsinking.
The RD91 package integrates insulated mounting (2500 VRMS) and clip-bonded die attachment to minimize thermal impedance and enhance surge current handling. Gate characteristics are specified across -40 °C to 125 °C, with holding current ≤150 mA and latching current ≤200 mA ensuring reliable turn-off and re-triggering stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 50 A - Sustained AC load current at 70 °C case temperature, defining continuous conduction capability |
| VDRM / VRRM | 1000 V - Peak repetitive off-state voltage in both directions, enabling use in 400–690 VAC systems |
| ITSM (tp = 8.3 ms) | 610 A - Non-repetitive surge current handling for welder arc initiation or motor startup transients |
| I²t (tp = 10 ms) | 1680 A²s - Fusing energy threshold determining short-circuit withstand time before failure |
| Rth(j-c) | 1.0 °C/W - Junction-to-case thermal resistance enabling efficient heat transfer to heatsink |
| dV/dt (Tj = 125 °C) | ≥1000 V/µs - Critical rate-of-rise immunity preventing false triggering in noisy industrial environments |
| VTM (ITM = 100 A) | ≤1.9 V - On-state voltage drop directly impacting conduction losses and thermal design |
Pinout & Package
The BTW67-1000 uses the RD91 insulated package: epoxy body meeting UL94 V0, screw-mountable with recommended torque 0.9–1.2 N·m, and conduction-cooled via case surface. Dimensions: 40.0 × 27.0 × 14.0 mm (L × W × H), weight 20 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current input terminal | Carries full load current into device; must be connected to high-side AC line or DC bus |
| Cathode (K) | Main current output terminal | Completes main current path; electrically referenced to heatsink in standard mounting |
| Gate (G) | Trigger control terminal | Receives low-energy pulse (≥8 mA) to initiate conduction; isolated from case by 2500 VRMS barrier |
Key Features
| Feature | Design Value |
|---|---|
| Clip-bonded die assembly | Reduces thermal resistance to 1.0 °C/W and enables 610 A surge current without bond-wire failure |
| 2500 VRMS insulation | Enables direct mounting to grounded heatsinks in Class I safety systems without additional isolation |
| High dV/dt immunity | 1000 V/µs minimum at 125 °C prevents spurious turn-on in EMI-heavy welding or motor drive environments |
| Low VTM and Rd | 1.9 V max on-state drop + 8.5 mΩ dynamic resistance minimizes conduction loss at 50 A RMS |
| UL 1557 certification | Validated insulation system (File E81734) meets reinforced insulation requirements for industrial controls |
Applications
| Solid State Relay (SSR) | Resistance Welding Control |
|---|---|
Use Scenario: High-reliability AC load switching in PLC output modules and HVAC contactor replacement. IC Role / Device Role / Timing Role: Main power switching element triggered by optocoupled gate driver for zero-voltage turn-on. Use Value: 50 A RMS rating and 2500 VRMS insulation eliminate need for external isolation transformers or creepage extenders. | Use Scenario: Primary-side AC switching in spot welders and seam welders requiring precise current burst timing. IC Role / Device Role / Timing Role: High-current AC switch synchronized to weld timer for controlled 10–100 ms conduction windows. Use Value: 610 A surge rating and 1680 A²s I²t withstand enable repeated high-current pulses without degradation. |
| Industrial Motor Starter | Heating Element Controller |
Use Scenario: Soft-start and phase-angle control for 3-phase induction motors up to 25 kW. IC Role / Device Role / Timing Role: Back-to-back configured SCR pair per phase for bidirectional AC control. Use Value: 1000 V blocking voltage supports 690 VAC systems; 125 °C junction rating ensures stable operation under overload conditions. | Use Scenario: Power regulation in industrial ovens, furnaces, and plastic extruders using phase-cut AC control. IC Role / Device Role / Timing Role: Single-phase AC power switch modulated via microcontroller-driven gate firing angle. Use Value: Low gate trigger current (8–80 mA) simplifies driver design; high dV/dt immunity prevents misfiring during heater coil inductive kickback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current SCR applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXYS L4008L5 | 40 A RMS, 800 V, TO-247 package, no insulation barrier | Requires external isolation for grounded heatsink mounting | Lower cost where insulation not required and heatsink isolation is feasible |
| ON Semiconductor MCR606 | 60 A RMS, 600 V, TO-220AB package, 1500 VRMS insulation | Lower voltage rating limits use to ≤400 VAC systems | Better surge margin but unsuitable for 690 VAC motor starters or high-voltage SSRs |
Compared with L4008L5 and MCR606, BTW67-1000 uniquely combines 1000 V blocking, 50 A RMS, 2500 VRMS insulation, and clip-bonded thermal performance-making it the only option qualified for insulated, high-voltage, high-surge industrial AC switching without derating or auxiliary isolation.
Availability
BTW67-1000 is available at Aetrix Electronics and suitable for solid state relays, resistance welding equipment, and high power motor control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BTW67-1000 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 BTW67-1000 belongs to ST's high-power thyristor product line, engineered specifically for ruggedized AC power control in industrial automation, energy infrastructure, and heavy equipment where reliability under thermal and electrical stress is critical.
FAQ
What is the maximum allowable case temperature for continuous operation?
The BTW67-1000 supports continuous operation at up to 70 °C case temperature for full 50 A RMS current. Derating begins above this point, with average on-state current reduced to 32 A at 70 °C and falling to zero at 125 °C case per Figure 2 in DS0642 Rev 8. Thermal design must maintain Tc ≤70 °C under worst-case ambient and airflow conditions.
Does BTW67-1000 require a heatsink, and what thermal interface material is recommended?
Yes-a heatsink is mandatory. With Rth(j-c) = 1.0 °C/W and 50 A RMS conduction loss ≈ 60–90 W (based on VTM and Rd), junction temperature will exceed 125 °C without heatsinking. ST recommends thermally conductive grease (e.g., Dow Corning TC-5022) and mounting torque of 0.9–1.2 N·m to ensure optimal thermal contact per RD91 mechanical spec.
Can BTW67-1000 be used in DC circuits?
No-it is a standard SCR, not a GTO or reverse-conducting device. It cannot be actively turned off in DC; commutation requires natural current zero-crossing or external forced-commutation circuitry. Its datasheet specifies AC-rated parameters only (IT(RMS), dV/dt, etc.), and DC blocking capability is not characterized or guaranteed.
Is the RD91 package RoHS compliant and lead-free?
Yes. The BTW67-1000 is RoHS 2002/95/EC compliant and manufactured using lead-free terminations and halogen-free epoxy per ST's ECOPACK2 specifications. Full compliance documentation, including material declarations and test reports, is available through ST's quality portal upon request with order code BTW67-1000.
BTW67-1000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- RD-91
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Off State:
- 1 kV
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Gate Trigger (Igt) (Max):
- 80 mA
- Voltage - On State (Vtm) (Max):
- 1.9 V
- Current - On State (It (AV)) (Max):
- 32 A
- Current - On State (It (RMS)) (Max):
- 50 A
- Current - Hold (Ih) (Max):
- 150 mA
- Current - Off State (Max):
- 10 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 580A, 610A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- RD91
BTW67-1000 FAQ
1.How can I place an order for BTW67-1000 through Aetrix?
Please submit a Request for Quotation (RFQ) for BTW67-1000 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 BTW67-1000 reliable?
The price and inventory of BTW67-1000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTW67-1000 is usually 5 days.
3.What payment methods are accepted for BTW67-1000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTW67-1000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTW67-1000?
BTW67-1000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTW67-1000 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 BTW67-1000?
For technical support, including BTW67-1000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTW67-1000 requirements.
6.How does Aetrix verify that BTW67-1000 is sourced from the original manufacturer or authorized distributors?
All BTW67-1000 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 BTW67-1000 meets industry standards.
7.What is the process for return or replacement of BTW67-1000?
All BTW67-1000 units undergo pre-shipment inspection (PSI). If there is an issue with BTW67-1000, 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 BTW67-1000 part is unused and in its original packaging.
Return procedure for BTW67-1000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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