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Diodes Incorporated B0520WS-7-F
- Part No.:
- B0520WS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
B0520WS-7-F.pdf
- Description:
- DIODE SCHOTTKY 20V 500MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:68,181
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Product details
Overview
B0520WS-7-F from Diodes Incorporated is a surface-mount Schottky barrier rectifier in SOD323 package, rated for 20 V peak repetitive reverse voltage, 0.5 A average forward current, and 0.31 V forward voltage at 0.1 A - optimized for low-loss DC/DC conversion in space-constrained portable power supplies.
For engineers reviewing the B0520WS-7-F datasheet, B0520WS-7-F pinout, B0520WS-7-F application, or B0520WS-7-F equivalent, key selection criteria include its low VF (0.31 V @ 0.1 A), 58 pF junction capacitance at 0 V, 235 mW power dissipation on FR-4, and AEC-Q qualified automotive-grade variants for reliability-critical designs.
Technical Context
This Schottky diode uses guard ring die construction to enhance transient immunity and suppress avalanche-induced failure under reverse-biased surge conditions. Its low forward voltage drop stems from a platinum-silicide or similar low-barrier metal-semiconductor junction, enabling high conductance without PN-junction recovery losses.
Designed for high-frequency switching applications, it exhibits minimal reverse recovery time (inherently near-zero) and stable capacitance (58 pF @ 0 V, decreasing with reverse bias), making it suitable for buck converter freewheeling paths and USB power path protection where fast turn-off and low stored charge are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - supports input rails up to 18 V DC with 10% margin against transients |
| IO(AV) | 0.5 A - delivers continuous output current in compact 3.7 mm² footprint |
| VF @ 0.1A | 0.31 V - reduces conduction loss by ~40% vs. standard silicon diodes in 3.3 V systems |
| IR @ 20V | 250 µA - limits leakage-induced standby power drain in battery-powered devices |
| CT @ 1MHz | 58 pF - minimizes high-frequency switching noise coupling in 1–5 MHz DC/DC converters |
| RθJA | 426 °C/W - requires thermal pad or copper pour for sustained >300 mA operation |
| TJ Range | −55 to +125 °C - enables deployment in automotive cabin and industrial ambient environments |
Pinout & Package
Package: SOD323 - ultra-compact 1.3 mm × 1.7 mm surface-mount plastic case with matte tin-plated leads, moisture sensitivity level 1, and cathode band marking on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switch node (e.g., buck converter high-side FET drain) to supply current during off-time |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output capacitor and load; cathode band identifies polarity for automated placement and visual inspection |
Key Features
| Feature | Design Value |
|---|---|
| Low VF (0.31 V @ 0.1 A) | Reduces power loss and thermal stress in 1–3 W portable power stages |
| Guard ring die construction | Improves ESD robustness (HBM >8 kV typical) and suppresses localized avalanche breakdown |
| 58 pF junction capacitance | Minimizes ringing and EMI in high-dV/dt synchronous rectifier circuits |
| SOD323 package (1.3 × 1.7 mm) | Enables PCB area savings >60% vs. SOD123 in wearable and IoT sensor modules |
Applications
| USB Power Delivery Interface | Wireless Charging Receiver |
|---|---|
Use Scenario: Reverse-polarity protection and VBUS path control in Type-C PD sink applications. IC Role / Device Role: Low-VF series diode preventing backfeed from battery into USB port during adapter removal. Use Value: 0.31 V forward drop preserves >95% of 5 V rail efficiency at 300 mA, minimizing heat in sealed enclosures. | Use Scenario: Output rectification in Qi-compliant 5 W wireless charging receiver modules. IC Role / Device Role: High-frequency freewheeling diode across synchronous rectifier MOSFET body diode. Use Value: Near-zero reverse recovery eliminates shoot-through risk and reduces EMI during 110–205 kHz AC-to-DC conversion. |
| Automotive Body Control Module | Industrial Sensor Node Power |
Use Scenario: Reverse battery protection and load dump clamping in 12 V LIN bus nodes. IC Role / Device Role: Guard ring-enhanced Schottky placed between battery feed and LDO input. Use Value: Withstands 2 A non-repetitive surge (IFSM) and operates reliably from −40 °C to +105 °C ambient. | Use Scenario: Input protection and hold-up rectification in battery-backed RS-485 sensor nodes. IC Role / Device Role: Isolates primary Li-ion supply from backup supercapacitor during main power loss. Use Value: 250 µA max leakage at 20 V ensures >1-year backup runtime with 0.1 F supercapacitor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB520S-30T1G | Higher VF (0.37 V @ 0.1 A); same 20 V VRRM and SOD-323 package | Marginally lower efficiency in <1 W systems; identical layout compatibility | Select when cost sensitivity outweighs 60 mV VF penalty and no automotive qualification required |
| NSR0520HT1G | Lower IR (50 µA @ 20 V); same VF and package; higher IFSM (3 A) | Better suited for long-term battery retention; enhanced surge tolerance in industrial transients | Prefer for >5-year shelf-life designs or locations with frequent 12 V load dump events |
Compared with RB520S-30T1G and NSR0520HT1G, B0520WS-7-F offers the lowest VF in this SOD323 20 V class while maintaining full JEDEC reliability qualification - optimal for thermally constrained, high-efficiency portable power rails.
Availability
B0520WS-7-F is available at Aetrix Electronics and suitable for USB PD interfaces, wireless charging receivers, automotive body control modules, and industrial sensor node power requiring stable component supply across production lifecycles.
Supply support for B0520WS-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The B0520WS belongs to Diodes' high-reliability Schottky rectifier product line, engineered for low-loss power conversion in portable, automotive, and industrial applications where thermal efficiency and board space are critical constraints.
FAQ
Is B0520WS-7-F suitable for automotive applications?
Yes - B0520WS-7-F is qualified to JEDEC standards referenced in AEC-Q for high reliability. While the standard part is not AEC-Q200 certified, Diodes offers automotive-grade Q-suffix variants (e.g., B0520WSQ-7-F) manufactured in IATF 16949 facilities and PPAP-capable for automotive use.
What is the thermal performance on standard FR-4 PCB?
With recommended pad layout per Diodes' package outline, RθJA is 426 °C/W. At 0.5 A IO and 0.43 V VF (max), power dissipation reaches ~215 mW - resulting in ~91 °C junction rise above ambient. Derating to 0.35 A is advised for continuous operation at 85 °C ambient.
Does B0520WS-7-F have a specified reverse recovery time?
No - as a Schottky barrier diode, it has no minority-carrier storage and therefore no defined reverse recovery time (trr). Its switching behavior is governed by junction capacitance (58 pF) and series resistance, enabling clean turn-off in high-frequency (>1 MHz) DC/DC topologies without recovery-related losses.
Can B0520WS-7-F replace a standard silicon diode in an existing design?
Yes - with identical SOD323 footprint and cathode-band polarity, it can directly replace silicon diodes like 1N4148 in low-voltage, low-current rectification. However, verify reverse leakage (250 µA @ 20 V) and derate peak surge current if replacing higher-IFSM parts, as IFSM is 2 A (8.3 ms half-sine).
B0520WS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 430 mV @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 250 µA @ 20 V
- Capacitance @ Vr, F:
- 58pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -55°C ~ 125°C
B0520WS-7-F FAQ
1.How can I place an order for B0520WS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B0520WS-7-F 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 B0520WS-7-F reliable?
The price and inventory of B0520WS-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B0520WS-7-F is usually 5 days.
3.What payment methods are accepted for B0520WS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B0520WS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B0520WS-7-F?
B0520WS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B0520WS-7-F 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 B0520WS-7-F?
For technical support, including B0520WS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B0520WS-7-F requirements.
6.How does Aetrix verify that B0520WS-7-F is sourced from the original manufacturer or authorized distributors?
All B0520WS-7-F 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 B0520WS-7-F meets industry standards.
7.What is the process for return or replacement of B0520WS-7-F?
All B0520WS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with B0520WS-7-F, 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 B0520WS-7-F part is unused and in its original packaging.
Return procedure for B0520WS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
B0520WS-7-F Tags
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