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STMicroelectronics BTW67-600
- Part No.:
- BTW67-600
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- RD-91
- Datasheet:
-
BTW67-600.pdf
- Description:
- SCR 600V 50A RD91
- Quantity:
- Payment:
- Shipping:
Inventory:8,402
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Product details
Overview
BTW67-600 from STMicroelectronics is a 50 A RMS, 1000 V repetitive peak off-state voltage (VDRM/VRRM) insulated-packaged SCR thyristor in RD91 package, designed for high-power switching in solid-state relays, welding equipment, and motor control systems. It features 610 A non-repetitive surge current (ITSM), 1.0 °C/W junction-to-case thermal resistance, and 2500 VRMS insulation rating per UL 1557.
For engineers reviewing the BTW67-600 datasheet, BTW67-600 pinout, BTW67-600 application, or BTW67-600 equivalent, key selection criteria include commutation capability (dV/dt ≥ 1000 V/µs at 125 °C), low on-state dynamic resistance (8.5 mΩ), gate trigger current range (8–80 mA), and clip-bonded thermal performance for high-current conduction.
Technical Context
This SCR operates as a unidirectional power switch with latching behavior triggered by gate current. Its design emphasizes robust surge handling (610 A ITSM, 1680 A²s I²t), fast turn-on (critical dl/dt = 50 A/µs), and stable operation across –40 to +125 °C junction temperature range.
The RD91 insulated package enables safe integration into high-voltage isolation barriers, supporting 2500 VRMS withstand voltage and meeting UL 1557 certification (File E81734). Thermal performance is enhanced via clip bonding, delivering Rth(j-c) = 1.0 °C/W under DC conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 50 A - continuous full-sine-wave conduction at Tc = 70 °C, enabling stable 5 kW+ AC load switching |
| VDRM / VRRM | 1000 V - maximum repetitive peak off-state voltage, defining safe blocking capability in 400–690 VAC industrial systems |
| ITSM (tp = 8.3 ms) | 610 A - non-repetitive surge current tolerance, critical for welder arc initiation and motor inrush suppression |
| Rth(j-c) | 1.0 °C/W - low thermal resistance enabling efficient heat transfer to heatsink without derating at 50 A |
| Vins (1 min) | 2500 VRMS - certified insulation voltage allowing direct mounting on grounded metal chassis in safety-critical equipment |
| dV/dt (Tj = 125 °C) | ≥1000 V/µs - high commutation immunity preventing false triggering during fast transients in inductive loads |
| IGT Range | 8–80 mA - wide gate sensitivity window compatible with standard microcontroller GPIO or optocoupler drivers |
Pinout & Package
BTW67-600 uses the RD91 insulated package: epoxy body (UL94 V0), screw-mountable with M6 thread, 40 mm × 27 mm footprint, and integrated creepage/clearance for 2500 VRMS isolation. Cooling is conduction-based via case surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current input terminal | High-current path entry point; must be connected to line-side AC source or DC bus positive |
| Cathode (K) | Main current output terminal | Current return path to load; electrically referenced to heatsink in RD91's isolated construction |
| Gate (G) | Trigger control terminal | Low-energy input (≤80 mA) that initiates conduction; requires clean, transient-free drive to avoid spurious turn-on |
Key Features
| Feature | Design Value |
|---|---|
| Clip-bonded die assembly | Reduces thermal resistance to 1.0 °C/W and increases surge current capacity vs. wire-bonded equivalents |
| UL 1557-certified insulation | 2500 VRMS isolation enables direct use in Class I safety-critical equipment without external barrier |
| High dV/dt immunity | 1000 V/µs minimum at 125 °C prevents false triggering in noisy welding or motor-drive environments |
| Low on-state dynamic resistance | 8.5 mΩ at 125 °C minimizes conduction loss and self-heating at 50 A RMS |
| Wide gate trigger range | 8–80 mA compatibility supports both low-power logic-level and robust optocoupler-based gate drives |
Applications
| Solid-State Relay (SSR) | Resistance Welding Control |
|---|---|
Use Scenario: Replacing electromechanical contactors in HVAC zone controls and industrial PLC outputs. IC Role / Device Role / Timing Role: Main power switching element providing zero-crossing or phase-angle controlled AC load switching. Use Value: Enables silent, bounce-free, long-life switching with 50 A RMS capacity and 2500 VRMS isolation for panel-mounted SSR modules. | Use Scenario: Controlling primary-side current in spot welders and seam welders requiring precise energy delivery. IC Role / Device Role / Timing Role: High-current AC switch triggered synchronously with transformer secondary timing to regulate weld energy. Use Value: Withstands 610 A surge peaks and delivers consistent 1000 V blocking for repeated short-duration weld pulses. |
| High-Power Motor Starter | Industrial Heating Control |
Use Scenario: Soft-start and reversing circuits for 3-phase induction motors up to 25 kW. IC Role / Device Role / Timing Role: Phase-controlled thyristor in back-to-back configuration for voltage ramping and torque limiting. Use Value: Low Rth(j-c) and 8.5 mΩ RD ensure stable thermal behavior during extended 50 A conduction at 60 Hz. | Use Scenario: Power regulation in industrial ovens, furnaces, and infrared heating panels. IC Role / Device Role / Timing Role: Line-frequency phase-angle controller modulating resistive heater power. Use Value: High dV/dt immunity (≥1000 V/µs) prevents misfiring due to EMI from adjacent heating elements or SCR banks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current SCR applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST T90-1200 | 90 A RMS, 1200 V VDRM, same RD91 package, higher ITSM (900 A) | Supports heavier motor loads and higher-voltage distribution systems (up to 690 VAC line-to-line) | Select when >50 A RMS or >1000 V blocking is required; gate drive remains compatible |
| Littelfuse S4065L | 40 A RMS, 600 V VDRM, TO-247 package, no isolation, lower ITSM (400 A) | Requires external isolation and heatsinking; suited for cost-sensitive, non-safety-critical controls | Choose only for lower-power, non-UL-insulated designs where board space and cost outweigh isolation needs |
Compared with BTW67-600, T90-1200 offers higher current and voltage headroom in identical form factor, while S4065L trades isolation and surge rating for lower cost and smaller footprint-making BTW67-600 optimal for safety-compliant, high-reliability 50 A industrial switching.
Availability
BTW67-600 is available at Aetrix Electronics and suitable for solid-state relays, resistance welding equipment, and high-power motor starters requiring stable component supply, long-lifecycle support, and UL-certified insulation integrity.
Supply support for BTW67-600 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.
BTW67-600 belongs to ST's high-power thyristor product line, engineered specifically for ruggedized AC power control in safety-critical industrial equipment where reliability, isolation, and thermal resilience are mandatory.
FAQ
What is the maximum allowable case temperature for continuous 50 A operation?
Per Figure 2 in DS0642 Rev 8, the BTW67-600 supports 50 A RMS average conduction only up to Tc = 70 °C. At higher case temperatures, derating is required: e.g., 40 A at 100 °C. Exceeding 70 °C at full 50 A risks thermal runaway due to reduced holding current margin and increased VTM.
Does BTW67-600 require a heatsink, and what mounting torque is specified?
Yes - the RD91 package requires mechanical attachment to a heatsink using an M6 screw. ST specifies a mounting torque of 0.9–1.2 N·m (8–10.6 lbf·in) to ensure optimal thermal contact without cracking the epoxy housing or deforming terminals.
Can BTW67-600 be used in DC applications?
Yes, but only with forced commutation - it is a semi-controllable device that cannot be turned off by gate signal. In DC circuits, external circuitry (e.g., LC snubber, auxiliary SCR, or MOSFET crowbar) must interrupt anode current to reset conduction, unlike fully controllable devices such as IGBTs.
Is the BTW67-600 RoHS compliant and halogen-free?
Yes - BTW67-600 complies with RoHS Directive 2002/95/EC and is manufactured in ST's ECOPACK2-compliant RD91 package, which is halogen-free and meets JEDEC JS709B requirements for brominated flame retardants.
BTW67-600 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- RD-91
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Off State:
- 600 V
- 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
BTW67-600 FAQ
1.How can I place an order for BTW67-600 through Aetrix?
Please submit a Request for Quotation (RFQ) for BTW67-600 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 BTW67-600 reliable?
The price and inventory of BTW67-600 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTW67-600 is usually 5 days.
3.What payment methods are accepted for BTW67-600?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTW67-600 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTW67-600?
BTW67-600 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTW67-600 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 BTW67-600?
For technical support, including BTW67-600 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTW67-600 requirements.
6.How does Aetrix verify that BTW67-600 is sourced from the original manufacturer or authorized distributors?
All BTW67-600 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 BTW67-600 meets industry standards.
7.What is the process for return or replacement of BTW67-600?
All BTW67-600 units undergo pre-shipment inspection (PSI). If there is an issue with BTW67-600, 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 BTW67-600 part is unused and in its original packaging.
Return procedure for BTW67-600:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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