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Vishay General Semiconductor - Diodes Division VS-2N689
- Part No.:
- VS-2N689
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- SCRs
- Package:
- TO-208AA, TO-48-3, Stud
- Datasheet:
-
VS-2N689.pdf
- Description:
- SCR 500V 25A TO208AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,486
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Product details
Overview
VS-2N689 from Vishay Semiconductors is a phase-control thyristor (SCR) designed for high-reliability AC power regulation in industrial and utility-grade equipment. It delivers 25 A RMS on-state current, 500 V repetitive peak off-state voltage (VDRM), and 600 V repetitive peak reverse voltage (VRRM), with a maximum on-state voltage of 2.3 V at 25 °C and 16 A average conduction. It operates across -65 °C to +125 °C junction temperature and is used in motor speed controllers, solid-state relays, and AC heater controls.
For engineers reviewing the VS-2N689 datasheet, VS-2N689 pinout, VS-2N689 application, or VS-2N689 equivalent, key selection criteria include its stud-mounted TO-48 package, gate trigger current (IGT) of 40 mA at 25 °C, dV/dt immunity of 100 V/μs, thermal resistance (RthJC) of 1.5 °C/W, and surge capability of 145 A (50 Hz).
Technical Context
The VS-2N689 is a single silicon-controlled rectifier optimized for half-wave or full-wave phase-angle control in line-frequency (50/60 Hz) AC systems. Its blocking voltage rating (500 V VDRM / 600 V VRRM) supports operation in 240 VAC and 480 VAC distribution environments with margin. The device uses a planar passivated junction structure and is rated for 145 A non-repetitive surge current under 50 Hz conditions.
It features a JEDEC-registered IGT of 40 mA at 25 °C and 18.5 mA at 125 °C, enabling robust triggering across temperature. Gate sensitivity is further defined by VGT ≤ 2 V (25 °C) and VGD ≤ 0.25 V (125 °C), ensuring noise-immune turn-off behavior in electrically noisy industrial settings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 500 V / 600 V - Supports reliable blocking in 240–480 VAC mains applications with safety margin |
| IT(RMS) | 25 A - Sustains continuous RMS load current without thermal derating at TC ≤ 65 °C |
| IT(AV) | 16 A - Average on-state current for 180° half-sine conduction, defining steady-state power handling |
| VTM | 2.3 V - Peak on-state voltage at 16 A average (50 A peak), directly impacts conduction loss and heatsink sizing |
| IGT | 40 mA @ 25 °C - Maximum gate trigger current required; determines driver circuit power and impedance design |
| dV/dt | 100 V/μs - Minimum critical rate of rise of off-state voltage before spurious turn-on; defines snubber requirements |
| RthJC | 1.5 °C/W - Junction-to-case thermal resistance; enables precise heatsink thermal budgeting for forced or natural convection |
Pinout & Package
VS-2N689 is housed in a stud-mounted TO-48 (TO-208AA) metal-can package with three terminals: Anode (A), Cathode (K), and Gate (G). The case serves as the Anode connection, requiring insulated mounting hardware when Anode is not at chassis ground potential.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Case) | Main current input terminal | Electrically connected to metal case; must be isolated from heatsink unless system reference permits |
| Cathode | Main current output terminal | Low-side switching node; referenced to load return path; carries full load current |
| Gate | Control input terminal | Triggers conduction when ≥ 40 mA DC pulse applied; requires low-impedance drive to ensure reliable turn-on |
Key Features
| Feature | Design Value |
|---|---|
| Stud-mounted TO-48 package | Enables direct mechanical and thermal coupling to large heatsinks; supports >100 W dissipation with proper mounting torque (20 lbf·in) |
| JEDEC-registered IGT and VGT | Guarantees gate drive compatibility across manufacturing lots; simplifies driver IC selection and validation |
| 145 A non-repetitive surge rating (50 Hz) | Withstands motor inrush, transformer energization, and short-duration overloads without failure |
| 100 V/μs dV/dt immunity | Reduces need for external snubbers in clean AC line environments; improves system reliability |
| -65 °C to +125 °C operating range | Validated for use in outdoor enclosures, unheated industrial cabinets, and high-ambient environments |
Applications
| Industrial Motor Speed Control | AC Solid-State Relay |
|---|---|
|
Use Scenario: Variable-speed control of single-phase induction motors in HVAC blowers and conveyor drives using phase-angle firing. IC Role / Device Role / Timing Role: Main power switching element; triggered at adjustable delay after zero-crossing to regulate RMS voltage delivered to motor winding. Use Value: Enables smooth torque control without mechanical wear; VS-2N689's 25 A RMS rating and 145 A surge support handle locked-rotor currents. |
Use Scenario: Replacement for electromechanical relays in PLC output modules controlling resistive heating elements and lighting loads. IC Role / Device Role / Timing Role: Bidirectional AC switch (used in back-to-back configuration); gated on/off per control signal to isolate load from AC line. Use Value: Eliminates contact bounce and arcing; VS-2N689's 500 V VDRM ensures safe operation on 240 VAC systems with transient margin. |
| Phase-Controlled Heater Regulation | Power Factor Correction Pre-Charge Circuit |
|
Use Scenario: Precision temperature control in industrial ovens and furnaces via proportional AC power delivery to resistive heating elements. IC Role / Device Role / Timing Role: Line-synchronized SCR switch; modulates conduction angle to adjust average power without harmonic filtering. Use Value: Delivers stable thermal output; VS-2N689's 2.3 V VTM and 1.5 °C/W RthJC minimize self-heating drift during extended duty cycles. |
Use Scenario: Inrush current limiting during startup of large DC bus capacitors in variable-frequency drives and UPS systems. IC Role / Device Role / Timing Role: Controlled pre-charge switch; triggered after soft-start timer to bypass NTC thermistor once bus reaches threshold. Use Value: Prevents fuse blowing and contact welding; VS-2N689's 145 A surge rating and 600 V VRRM safely handle capacitor charging transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phase-control thyristor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VS-2N688 | Lower blocking rating: 400 V VDRM / 500 V VRRM; identical IT(RMS) = 25 A, IGT = 40 mA, and TO-48 package | Suitable only for 120–240 VAC systems; insufficient margin for 480 VAC or high-transient environments | Select VS-2N688 only if system peak line voltage remains ≤ 340 V and transient suppression is robust. |
| VS-2N690 | Higher blocking rating: 600 V VDRM / 720 V VRRM; same IT(RMS) = 25 A, IGT = 40 mA, and TO-48 package | Supports 480 VAC + 20% transients; slightly higher VTM (2.3 V typical) but identical thermal performance | Choose VS-2N690 for new designs targeting global 400–480 VAC markets or where long-term voltage creep is anticipated. |
Compared with VS-2N689, VS-2N688 offers lower voltage margin at identical cost and thermal behavior, while VS-2N690 provides enhanced blocking headroom with no trade-off in conduction loss or footprint-making it the preferred upgrade path for future-proofed industrial controls.
Availability
VS-2N689 is available at Aetrix Electronics and suitable for industrial motor control, AC solid-state relay design, and phase-controlled heater regulation requiring stable component supply and long-lifecycle support.
Supply support for VS-2N689 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, thyristors, MOSFETs, and optoelectronics for industrial, automotive, and power applications.
The VS-2N681 series belongs to Vishay's stud-mount SCR product line, engineered for ruggedized AC power control in harsh environments where thermal stability, surge resilience, and long-term parameter consistency are critical.
FAQ
What is the maximum allowable case temperature for VS-2N689 at 16 A average on-state current?
The maximum allowable case temperature for VS-2N689 is 65 °C when conducting 16 A average on-state current under 180° half-sine wave conduction, as specified in the Major Ratings table. This limit ensures junction temperature remains within the -65 °C to +125 °C operating range, assuming a junction-to-case thermal resistance of 1.5 °C/W and proper heatsink interface. Exceeding this case temperature risks thermal runaway or premature wear.
Does VS-2N689 require a heatsink, and what mounting torque is recommended?
Yes, VS-2N689 requires a heatsink due to its 2.3 V on-state voltage drop and 25 A RMS current capability, which can generate up to ~57.5 W of conduction loss at full load. Vishay specifies a mounting torque of 20 lbf·in (±10%) for lubricated threads to ensure optimal thermal contact between the TO-48 case and heatsink surface. Insufficient torque increases thermal resistance and risks exceeding the 125 °C max junction temperature.
What is the gate trigger voltage requirement for VS-2N689, and how does it vary with temperature?
The maximum required DC gate trigger voltage (VGT) for VS-2N689 is 2 V at 25 °C and 3 V at -65 °C, per JEDEC registration. At 125 °C, VGT drops to 2 V, reflecting reduced gate sensitivity at high temperature. Designers must ensure gate drivers deliver ≥ 2 V into the specified gate impedance (typically 40 Ω source) across the full -65 °C to +125 °C junction range to guarantee reliable turn-on under all operating conditions.
Can VS-2N689 be used in a back-to-back configuration for AC switching?
Yes, VS-2N689 is commonly used in back-to-back configuration with a second identical SCR to achieve bidirectional AC switching, as required in solid-state relays and AC dimmers. Each device handles one half-cycle, with gate signals phased 180° apart. The 500 V VDRM and 600 V VRRM ratings provide sufficient margin for 240 VAC RMS systems, and the 100 V/μs dV/dt rating helps prevent false triggering during polarity reversal.
What is the non-repetitive surge current rating for VS-2N689, and under what test conditions is it specified?
The non-repetitive surge current rating for VS-2N689 is 145 A for a 50 Hz half-cycle sine wave or 6 ms rectangular pulse, tested with rated VRRM reapplied immediately after the surge and initial junction temperature at 125 °C. This rating reflects the device's ability to withstand short-duration overloads such as motor startup inrush or transformer magnetizing surges without destructive failure.
VS-2N689 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-208AA, TO-48-3, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Off State:
- 500 V
- Voltage - Gate Trigger (Vgt) (Max):
- 2 V
- Current - Gate Trigger (Igt) (Max):
- 40 mA
- Voltage - On State (Vtm) (Max):
- 2 V
- Current - On State (It (AV)) (Max):
- 16 A
- Current - On State (It (RMS)) (Max):
- 25 A
- Current - Hold (Ih) (Max):
- 20 mA
- Current - Off State (Max):
- 3 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 145A, 150A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -65°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis, Stud Mount
- Supplier Device Package:
- TO-208AA (TO-48)
VS-2N689 FAQ
1.How can I place an order for VS-2N689 through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-2N689 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 VS-2N689 reliable?
The price and inventory of VS-2N689 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-2N689 is usually 5 days.
3.What payment methods are accepted for VS-2N689?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-2N689 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-2N689?
VS-2N689 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-2N689 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 VS-2N689?
For technical support, including VS-2N689 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-2N689 requirements.
6.How does Aetrix verify that VS-2N689 is sourced from the original manufacturer or authorized distributors?
All VS-2N689 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 VS-2N689 meets industry standards.
7.What is the process for return or replacement of VS-2N689?
All VS-2N689 units undergo pre-shipment inspection (PSI). If there is an issue with VS-2N689, 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 VS-2N689 part is unused and in its original packaging.
Return procedure for VS-2N689:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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