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Vishay General Semiconductor - Diodes Division VS-20TQ035PBF
- Part No.:
- VS-20TQ035PBF
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
VS-20TQ035PBF.pdf
- Description:
- DIODE SCHOTTKY 35V 20A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,874
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Product details
Overview
VS-20TQ035PBF from Vishay Semiconductors is a 35 V, 20 A average current Schottky rectifier in TO-220AC package, optimized for low forward voltage (0.51 V at 20 A, 125 °C) and high-frequency switching. It operates up to 150 °C junction temperature and features guard ring ruggedness, RoHS-compliant lead-free construction, and 27 mJ non-repetitive avalanche energy - used in DC/DC converters and reverse battery protection circuits.
For engineers reviewing the VS-20TQ035PBF datasheet, VS-20TQ035PBF pinout, VS-20TQ035PBF application, or VS-20TQ035PBF equivalent, key selection criteria include forward voltage drop at elevated temperature, surge current rating (1800 A), thermal resistance (1.50 °C/W), junction capacitance (1400 pF), and TO-220AC mechanical mounting compatibility.
Technical Context
This Schottky rectifier employs proprietary barrier technology enabling stable operation at TJ = 150 °C while maintaining low VF and moderate IR. Its single-die TO-220AC construction supports high-current freewheeling with minimal conduction loss and fast recovery (dV/dt = 10,000 V/μs).
The device is qualified per JEDEC-JESD47 and features high-purity epoxy encapsulation for moisture resistance. Thermal design relies on direct case-to-heatsink mounting (RthCS = 0.50 °C/W typical), with anode (pin 3) and cathode (pins 1 & 2) configured for low-inductance layout (LS = 8.0 nH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 20 A average forward current - supports continuous power delivery in 50 % duty cycle, TC = 116 °C conditions |
| VR | 35 V maximum DC reverse voltage - defines safe blocking capability in low-voltage bus applications |
| VF @ 20 A, 125 °C | 0.51 V - enables <10.2 W conduction loss per diode at full rated current and elevated temperature |
| IRM max. | 105 mA at 125 °C - quantifies leakage under worst-case thermal stress, critical for standby efficiency |
| RthJC | 1.50 °C/W - determines minimum heatsink requirement for thermal management at full load |
| EAS | 27 mJ - specifies unclamped inductive switching robustness in flyback or synchronous rectifier failure modes |
| dV/dt | 10,000 V/μs - ensures reliable commutation in high-speed hard-switched topologies without false turn-on |
Pinout & Package
TO-220AC package with isolated metal tab (cathode-connected), 3-terminal configuration, and screw-mount thermal interface. Mounting torque: 6–12 kgf·cm (5–10 lbf·in). Approximate weight: 2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 & 2 (Tab + Lead) | Cathode | Electrically common cathode terminals - tab serves as primary heat path and must be electrically tied to system ground or return rail |
| 3 | Anode | Input terminal for forward conduction - routed away from high-dV/dt nodes to minimize capacitive coupling |
Key Features
| Feature | Design Value |
|---|---|
| 150 °C junction rating | Enables operation in thermally constrained environments (e.g., sealed power modules) without derating below 20 A |
| Guard ring structure | Improves edge termination reliability and prevents premature avalanche breakdown under transient overvoltage |
| Low VF at high TJ | Maintains efficiency in high-ambient applications (e.g., automotive under-hood DC/DC) where VF typically rises with temperature |
| RoHS-compliant PbF marking | Meets global environmental compliance without requiring process change in lead-free assembly lines |
| TO-220AC mechanical standardization | Ensures drop-in compatibility with existing heatsink footprints and mounting hardware across Vishay's 20 A Schottky family |
Applications
| DC/DC Converter Output Rectification | Reverse Battery Protection |
|---|---|
Use Scenario: Secondary-side rectification in 12 V input, 3.3–5 V output synchronous or quasi-resonant buck converters. IC Role / Device Role / Timing Role: Unidirectional power path control with minimal forward loss and fast recovery to reduce switching node ringing. Use Value: 0.51 V VF at 125 °C lowers conduction loss by ~18 % vs. comparable 45 V Schottkys, improving full-load efficiency by 0.7–1.2 %. | Use Scenario: Polarity protection in 12 V automotive infotainment systems exposed to jump-start transients. IC Role / Device Role / Timing Role: Low-loss series blocking element that conducts only during correct battery orientation. Use Value: 105 mA IRM at 125 °C limits reverse leakage power dissipation to <3.7 mW, preventing thermal runaway during hot-cranking. |
| Freewheeling Diode in Motor Drives | OR-ing Diode in Redundant Power Supplies |
Use Scenario: Flywheel path for brushed DC motor current decay during PWM off-time in industrial actuators. IC Role / Device Role / Timing Role: High-current, low-VF clamp that sustains current continuity during rapid IGBT/MOSFET turn-off. Use Value: 1800 A IFSM withstands peak inductive kick without bond wire fusing, supporting 20 A RMS motor currents with 5:1 surge margin. | Use Scenario: Diode-OR configuration in dual 24 V telecom power shelves to prevent backfeed between supplies. IC Role / Device Role / Timing Role: Forward-biased isolation element ensuring supply independence during fault or maintenance. Use Value: 1400 pF CT minimizes reverse recovery charge injection during supply switchover, reducing cross-conduction risk in parallel architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-20TQ035-N3 | Halogen-free epoxy, identical electrical specs and TO-220AC pinout; same VF, IR, and thermal resistance | Required where IEC 61249-2-21 halogen-free compliance is mandated (e.g., EU industrial equipment) | Select VS-20TQ035-N3 when halogen-free material content is contractually required; otherwise VS-20TQ035PBF offers identical performance at broader availability |
| ON Semiconductor MBR2035CT | Center-tap dual-die configuration (2 × 10 A), higher VF (0.57 V @ 20 A, 25 °C), no specified EAS rating | Suitable for lower-cost dual-rail outputs but lacks single-die ruggedness and avalanche energy spec for inductive loads | Choose MBR2035CT only for cost-sensitive, non-inductive applications; VS-20TQ035PBF provides superior thermal margin and proven avalanche robustness |
Compared with VS-20TQ035-N3, the VS-20TQ035PBF offers identical electrical and thermal performance with standard RoHS compliance, while the MBR2035CT trades single-die reliability and avalanche rating for dual-diode packaging - making VS-20TQ035PBF optimal for high-reliability, inductive-switching designs.
Availability
VS-20TQ035PBF is available at Aetrix Electronics and suitable for DC/DC converter output rectification, reverse battery protection, freewheeling diode applications requiring stable component supply, consistent thermal performance, and JEDEC-qualified ruggedness.
Supply support for VS-20TQ035PBF 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, power handling, and precision.
The VS-20TQ035PBF belongs to Vishay's high-current Schottky rectifier product line, engineered for low-loss power conversion in automotive, industrial, and computing power supplies where thermal stability and surge robustness are critical.
FAQ
What is the maximum junction temperature rating for the VS-20TQ035PBF?
The VS-20TQ035PBF is rated for continuous operation up to 150 °C junction temperature, validated per JEDEC-JESD47 qualification. This allows full 20 A average current capability at case temperatures up to 116 °C with appropriate heatsinking, making it suitable for high-ambient environments such as automotive engine compartments or enclosed industrial power modules.
Does the VS-20TQ035PBF have a center-tap or dual-diode configuration?
No, the VS-20TQ035PBF is a single-die Schottky rectifier with anode (pin 3) and cathode (pins 1 & 2) terminals in TO-220AC package. It is not a center-tapped or dual-diode device like some competing parts (e.g., MBR2035CT); its single-die architecture delivers higher surge current capability (1800 A) and specified avalanche energy (27 mJ).
What is the thermal resistance from junction to case (RthJC) for the VS-20TQ035PBF?
The VS-20TQ035PBF has a maximum thermal resistance of 1.50 °C/W from junction to case under DC operation. This value is measured with the device mounted to a heatsink using proper thermal interface material and mounting torque (6–12 kgf·cm), and is critical for calculating allowable power dissipation and heatsink sizing in high-current applications.
Is the VS-20TQ035PBF halogen-free?
The VS-20TQ035PBF is RoHS-compliant and lead-free (PbF), but it is not halogen-free. For halogen-free compliance per IEC 61249-2-21, the alternative part VS-20TQ035-N3 must be selected - it uses halogen-free epoxy while retaining identical electrical and thermal specifications as the VS-20TQ035PBF.
What is the reverse leakage current (IRM) of the VS-20TQ035PBF at 125 °C?
The VS-20TQ035PBF has a maximum reverse leakage current of 105 mA at 125 °C and rated VR (35 V). This value is specified under worst-case thermal stress and directly impacts standby power loss in reverse-battery protection or OR-ing applications, where low IRM prevents excessive heating during extended reverse bias.
VS-20TQ035PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 35 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 570 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 2.7 mA @ 35 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
VS-20TQ035PBF FAQ
1.How can I place an order for VS-20TQ035PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-20TQ035PBF 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-20TQ035PBF reliable?
The price and inventory of VS-20TQ035PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-20TQ035PBF is usually 5 days.
3.What payment methods are accepted for VS-20TQ035PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-20TQ035PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-20TQ035PBF?
VS-20TQ035PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-20TQ035PBF 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-20TQ035PBF?
For technical support, including VS-20TQ035PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-20TQ035PBF requirements.
6.How does Aetrix verify that VS-20TQ035PBF is sourced from the original manufacturer or authorized distributors?
All VS-20TQ035PBF 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-20TQ035PBF meets industry standards.
7.What is the process for return or replacement of VS-20TQ035PBF?
All VS-20TQ035PBF units undergo pre-shipment inspection (PSI). If there is an issue with VS-20TQ035PBF, 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-20TQ035PBF part is unused and in its original packaging.
Return procedure for VS-20TQ035PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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