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Vishay General Semiconductor - Diodes Division VS-16FR20
- Part No.:
- VS-16FR20
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-203AA, DO-4, Stud
- Datasheet:
-
VS-16FR20.pdf
- Description:
- DIODE GEN PURP 200V 16A DO203AA
- Quantity:
- Payment:
- Shipping:
Inventory:79
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Product details
Overview
VS-16FR20 from Vishay Semiconductors is a standard recovery power diode in DO-4 (DO-203AA) stud package with reverse polarity (anode-to-stud), rated for 200 V repetitive peak reverse voltage (VRRM), 16 A average forward current (IF(AV)) at 140 °C case temperature, and 370 A non-repetitive surge current at 60 Hz - used in industrial battery chargers and DC power supplies requiring robust thermal handling.
For engineers reviewing the VS-16FR20 datasheet, VS-16FR20 pinout, VS-16FR20 application, or VS-16FR20 equivalent, key selection criteria include its stud-mount thermal interface (RthJC = 1.6 K/W), dual-conduction-angle derating curves, I²t fusing rating of 560 A²s at 60 Hz, and compatibility with forced-air or heatsink-cooled high-current rectification stages.
Technical Context
This device operates as a single-element, unidirectional, standard-recovery rectifier optimized for line-frequency (50/60 Hz) AC-to-DC conversion. Its conduction behavior is defined by two forward voltage slope regions (rf1 = 7.8 mΩ, rf2 = 5.7 mΩ) and threshold voltages VF(TO)1 = 0.77 V and VF(TO)2 = 0.90 V at TJ = 175 °C.
Thermal performance is governed by junction-to-case resistance (RthJC = 1.6 K/W DC), with documented ΔRthJC increases up to +1.20 K/W under 30° sinusoidal conduction. Mechanical mounting uses M5 × 0.8 or 10-32 UNF-2A stud threads with specified torque (1.2 N·m lubricated).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - maximum repetitive reverse blocking voltage; defines safe AC input voltage headroom before breakdown |
| IF(AV) | 16 A at TC = 140 °C - continuous DC output current capability with heatsink cooling |
| IFSM (60 Hz) | 370 A - surge withstand for transformer inrush or short-circuit transients without fuse activation |
| I²t (60 Hz) | 560 A²s - fusing energy limit; used to coordinate with fast-acting overcurrent protection |
| RthJC | 1.6 K/W - thermal resistance from junction to stud base; determines minimum heatsink requirement |
| VFM | 1.23 V at Ipk = 50 A, 25 °C - forward drop under pulsed load; impacts conduction loss and thermal design |
| TJ Range | –65 to +175 °C - operating junction temperature range; supports industrial ambient extremes |
Pinout & Package
VS-16FR20 uses a DO-4 (DO-203AA) stud package with reverse polarity: anode connected to the threaded stud, cathode accessible via the insulated flange or auxiliary terminal (per Vishay Doc #95311). Mounting surface is smooth, flat, and greased per spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Stud (threaded) | Anode | Primary high-current input node; electrically and thermally coupled to heatsink |
| Flange / auxiliary terminal | Cathode | Isolated output node; requires insulated mounting hardware to prevent shorting to heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Stud-anode reverse polarity | Enables direct mounting to grounded heatsinks while maintaining circuit isolation on cathode side |
| High IFSM (370 A @ 60 Hz) | Supports transformer-coupled power supplies with high inrush currents without degradation |
| Low RthJC (1.6 K/W) | Reduces thermal bottleneck between die and heatsink, enabling higher sustained power density |
| Two-region forward slope (rf1/rf2) | Enables accurate loss modeling across light-load and full-load operating conditions |
Applications
| Battery Chargers | Industrial Power Supplies |
|---|---|
Use Scenario: Three-phase controlled rectifier stage in 10–20 A industrial battery charging systems. IC Role / Device Role / Timing Role: Main AC-input rectifier diode handling full-load current and transformer inrush surges. Use Value: 370 A IFSM and 560 A²s I²t ensure reliable operation during repeated charge-cycle startups without thermal runaway. | Use Scenario: Unregulated DC bus generation in CNC machine tool control cabinets. IC Role / Device Role / Timing Role: Line-frequency rectifier converting 230 VAC mains to ~325 VDC bus. Use Value: 200 V VRRM provides 15 % margin above peak line voltage; RthJC = 1.6 K/W enables compact heatsink integration. |
| Converter Input Stages | Machine Tool Controls |
Use Scenario: Input rectification for 16 A-rated DC-DC converters in telecom infrastructure. IC Role / Device Role / Timing Role: Primary-side diode in choke-input or capacitor-input filter configuration. Use Value: Dual forward voltage thresholds (0.77 V / 0.90 V) allow precise conduction loss estimation across variable load profiles. | Use Scenario: Rectification in servo drive power modules for hydraulic press controls. IC Role / Device Role / Timing Role: High-current freewheeling and supply rectification element mounted directly to chassis heatsink. Use Value: Stud-anode construction allows secure mechanical attachment and low-inductance thermal path to metal enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VSKY16-02 | Same DO-4 package, 200 V VRRM, but stud cathode (normal polarity); RthJC = 1.5 K/W | Requires insulated stud mounting; not interchangeable without PCB/mechanical redesign | Select when cathode-to-heatsink grounding is preferred and layout permits insulation |
| STTH1602CR | TO-247AC package, 200 V VRRM, 16 A IF(AV), ultrafast recovery (trr = 35 ns) | Lower switching loss but higher cost; unsuitable for pure line-frequency use due to unnecessary speed | Choose only if system adds high-frequency switching or needs reduced EMI from faster recovery |
Compared with VS-16FR20, VSKY16-02 offers marginally better thermal resistance but opposite polarity - requiring mechanical rework - while STTH1602CR trades cost and ruggedness for speed irrelevant in 50/60 Hz rectifiers, making VS-16FR20 optimal for cost-sensitive, thermally constrained industrial line-frequency designs.
Availability
VS-16FR20 is available at Aetrix Electronics and suitable for industrial battery chargers, CNC power supplies, and machine tool controls requiring stable component supply, long-lifecycle support, and traceable stud-diode sourcing.
Supply support for VS-16FR20 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, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The VS-16FR20 belongs to Vishay's VS-16F(R) Series of stud-mounted standard recovery diodes, engineered for rugged, high-current AC/DC conversion in harsh environments where thermal stability and surge resilience are critical.
FAQ
What is the mounting polarity configuration of the VS-16FR20?
The VS-16FR20 features reverse polarity: the anode is connected to the threaded stud, and the cathode is isolated on the flange or auxiliary terminal. This configuration allows direct mounting to a grounded heatsink while keeping the cathode electrically isolated - essential for top-side circuit routing in industrial power modules. Always verify polarity with multimeter diode test before installation.
Does the VS-16FR20 support both 50 Hz and 60 Hz AC line frequencies?
Yes, the VS-16FR20 is fully rated for both 50 Hz and 60 Hz operation: IFSM = 350 A at 50 Hz and 370 A at 60 Hz, with corresponding I²t values of 612 A²s and 560 A²s. Its thermal derating curves (Fig. 1–2) explicitly cover both frequencies, confirming suitability for global mains-powered equipment including North American (60 Hz) and European/Asian (50 Hz) industrial systems.
What is the maximum allowable case temperature for continuous operation of the VS-16FR20?
The VS-16FR20 is rated for 16 A average forward current (IF(AV)) at a case temperature (TC) of 140 °C. Operation above this temperature requires derating per Fig. 1 in the datasheet - e.g., at 160 °C TC, IF(AV) drops to ~12 A for 180° conduction. The absolute maximum junction temperature remains 175 °C, so heatsink design must maintain TC ≤ 140 °C under worst-case ambient and airflow conditions.
Can the VS-16FR20 be used in capacitor-input versus choke-input filter configurations?
Yes, the VS-16FR20 is suitable for both capacitor-input and choke-input rectifier filters. Its standard recovery characteristics (no soft recovery specification) and high IFSM make it especially robust in choke-input designs with high surge currents, while its 1.23 V VFM at 50 A ensures predictable conduction loss in capacitor-input stages. Designers should validate peak current stress using the I²t and IFSM ratings per actual waveform shape.
What torque value should be applied when mounting the VS-16FR20 stud?
For the VS-16FR20, apply 1.2 N·m (10 lbf·in) torque when mounting with lubricated threads, or 1.5 N·m (13 lbf·in) with dry (non-lubricated) threads - per Vishay Doc #93491. Over-torquing risks stud deformation or internal bond damage; under-torquing increases thermal resistance and may cause localized overheating. Use calibrated torque tools and verify contact flatness before final tightening.
VS-16FR20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-203AA, DO-4, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard, Reverse Polarity
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 16A
- Voltage - Forward (Vf) (Max) @ If:
- 1.23 V @ 50 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 12 mA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis, Stud Mount
- Supplier Device Package:
- DO-203AA (DO-4)
- Operating Temperature - Junction:
- -65°C ~ 175°C
VS-16FR20 FAQ
1.How can I place an order for VS-16FR20 through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-16FR20 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-16FR20 reliable?
The price and inventory of VS-16FR20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-16FR20 is usually 5 days.
3.What payment methods are accepted for VS-16FR20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-16FR20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-16FR20?
VS-16FR20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-16FR20 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-16FR20?
For technical support, including VS-16FR20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-16FR20 requirements.
6.How does Aetrix verify that VS-16FR20 is sourced from the original manufacturer or authorized distributors?
All VS-16FR20 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-16FR20 meets industry standards.
7.What is the process for return or replacement of VS-16FR20?
All VS-16FR20 units undergo pre-shipment inspection (PSI). If there is an issue with VS-16FR20, 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-16FR20 part is unused and in its original packaging.
Return procedure for VS-16FR20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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