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Diodes Incorporated B520C-13
- Part No.:
- B520C-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
B520C-13.pdf
- Description:
- DIODE SCHOTTKY 20V 5A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,415
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Product details
Overview
B520C-13 from Diodes Incorporated is a 20 V, 5.0 A surface-mount Schottky barrier rectifier in SMC package, featuring 0.55 V max forward voltage at 5.0 A and 0.5 mA max reverse leakage at rated VR, optimized for polarity protection and freewheeling in low-voltage DC/DC converters and power supplies.
For engineers reviewing the B520C-13 datasheet, B520C-13 pinout, B520C-13 application, or B520C-13 equivalent, key selection criteria include its low VF for reduced conduction loss, 100 A surge rating for transient robustness, SMC thermal performance (RθJT = 10 °C/W), and RoHS-compliant lead-free plating suitable for automated assembly.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient voltage immunity and suppress avalanche-induced failure. Its low junction-to-terminal thermal resistance (10 °C/W) enables high-current operation without external heatsinking when mounted on standard PCB copper pads.
Designed for high-frequency switching applications, it exhibits 300 pF typical junction capacitance at 4 V reverse bias and maintains stable reverse leakage (<0.5 mA at 25°C, <20 mA at 100°C), supporting reliable operation in 100 kHz–1 MHz DC/DC topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in polarity protection and flyback clamp circuits. |
| IO | 5.0 A - Average rectified output current; supports continuous 5 A conduction in TO-277 footprint with minimal derating up to +125°C. |
| VF Max | 0.55 V @ 5.0 A - Low forward drop minimizes power loss (≤2.75 W) and improves system efficiency in 3.3 V/5 V rail applications. |
| IR Max | 0.5 mA @ 25°C - Low leakage preserves battery life in always-on circuits and avoids false triggering in sensing paths. |
| RθJT | 10 °C/W - Junction-to-terminal thermal resistance enables direct thermal coupling to PCB copper, simplifying thermal design. |
| IFSM | 100 A - Non-repetitive surge rating handles inrush and short-circuit transients in motor drivers and SMPS inputs. |
Pinout & Package
Package: SMC (TO-277), molded plastic body with UL 94V-0 flammability rating, matte tin-plated terminals, cathode indicated by band or notch. Weight: 0.21 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to input/source side in polarity protection; accepts up to 5 A DC with ≤0.55 V drop. |
| Cathode | Current exit point during forward conduction; marked with band/notch | Connected to load/GND side; provides low-impedance return path with controlled reverse leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and surge immunity by preventing edge breakdown, enabling reliable operation in noisy industrial environments. |
| Low VF and high IO rating | Delivers >85% efficiency in 5 V buck converters at full load, reducing thermal stress on adjacent components. |
| RoHS-compliant, halogen-free "Green" finish | Meets EU Directive 2015/863/EU with <900 ppm Br/Cl and <1000 ppm Sb; compatible with lead-free reflow profiles. |
| JEDEC-qualified reliability | Qualified per AEC-Q standards for high-reliability commercial use; moisture sensitivity level 1 ensures no bake requirement before assembly. |
Applications
| Power Supply Polarity Protection | DC/DC Converter Freewheeling |
|---|---|
Use Scenario: Prevents damage from reverse battery connection in 5 V/12 V wall adapters and USB-C PD accessories. IC Role / Device Role / Timing Role: Unidirectional current gate placed between input connector and main regulator IC. Use Value: 0.55 V VF limits voltage loss to <2% at 5 A, preserving regulation margin while blocking reverse current with <0.5 mA leakage. | Use Scenario: Provides low-loss return path for inductor current during MOSFET off-time in synchronous buck converters. IC Role / Device Role / Timing Role: Passive freewheeling diode replacing high-side switch dead-time conduction path. Use Value: 300 pF junction capacitance minimizes switching node ringing; 100 A IFSM withstands peak inductor current surges. |
| Motor Driver Recirculation | Industrial Sensor Power Conditioning |
Use Scenario: Clamps inductive kickback in 24 V brushed DC motor H-bridge drivers. IC Role / Device Role / Timing Role: Flyback diode across motor winding to dissipate stored energy during PWM turn-off. Use Value: 10 °C/W RθJT allows direct PCB heat sinking, sustaining 5 A recirculation without thermal shutdown at ambient ≤85°C. | Use Scenario: Isolates sensor supply rails from shared system power in factory automation nodes. IC Role / Device Role / Timing Role: Reverse-polarity blocker in 3.3 V sensor interface circuitry with ultra-low leakage requirement. Use Value: 0.5 mA IR max at 25°C prevents signal corruption in precision analog front-ends; SMC footprint fits compact 2-layer PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS52 - Diodes Inc. | Same SMC package, 20 V VRRM, but 0.52 V VF typ (vs. 0.55 V max), 120 A IFSM | Slightly lower conduction loss; higher surge rating suits more demanding motor control | Select SS52 if tighter VF tolerance or higher surge margin is required; identical footprint and assembly process. |
| SB520-E3/54 - Vishay | SMC package, 20 V VRRM, 0.55 V VF max, but 0.8 mA IR max at 25°C (vs. 0.5 mA) | Higher leakage may affect battery-powered sensor nodes with microamp sleep current budgets | Choose SB520-E3/54 only where leakage is non-critical and second-source qualification is mandated. |
Compared with SS52 and SB520-E3/54, B520C-13 offers the lowest guaranteed IR (0.5 mA) for ultra-low-power systems, balanced VF performance, and JEDEC-qualified reliability-making it optimal for cost-sensitive, thermally constrained commercial power designs.
Availability
B520C-13 is available at Aetrix Electronics and suitable for polarity protection, freewheeling diode, and recirculation diode applications requiring stable component supply, consistent SMC packaging, and RoHS-compliant manufacturing.
Supply support for B520C-13 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 B520C-13 belongs to Diodes' general-purpose Schottky rectifier product line, engineered for high-efficiency, low-VF power conversion in commercial-grade power supplies, motor controls, and consumer electronics.
FAQ
What is the maximum junction temperature for continuous operation of B520C-13?
The B520C-13 has an operating junction temperature range of –55°C to +150°C. For continuous 5.0 A operation, thermal design must ensure TJ remains ≤150°C-achievable with ≥8 mm² copper pad area per terminal and ambient ≤85°C, given its 10 °C/W RθJT.
Is B520C-13 suitable for automotive applications?
No-B520C-13 is qualified for commercial-grade reliability per JEDEC standards. For automotive use, Diodes offers the AEC-Q200-qualified B520CQ variant, which undergoes additional stress testing and has tighter parametric screening for under-hood environments.
How does the guard ring construction improve robustness?
The guard ring die structure distributes electric field stress away from the active junction periphery, suppressing premature edge breakdown during voltage transients. This extends device lifetime in applications exposed to load dump or ESD events without requiring external TVS clamping.
Can B520C-13 be used in parallel for higher current handling?
Parallel operation is not recommended due to mismatch in forward voltage characteristics-even minor VF variations cause current imbalance. For >5 A requirements, select a single higher-rated Schottky (e.g., B620C-13) or verify matched binning and thermal coupling per Diodes' application note AN-2001.
B520C-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- 300pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -55°C ~ 150°C
B520C-13 FAQ
1.How can I place an order for B520C-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B520C-13 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 B520C-13 reliable?
The price and inventory of B520C-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B520C-13 is usually 5 days.
3.What payment methods are accepted for B520C-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B520C-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B520C-13?
B520C-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B520C-13 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 B520C-13?
For technical support, including B520C-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B520C-13 requirements.
6.How does Aetrix verify that B520C-13 is sourced from the original manufacturer or authorized distributors?
All B520C-13 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 B520C-13 meets industry standards.
7.What is the process for return or replacement of B520C-13?
All B520C-13 units undergo pre-shipment inspection (PSI). If there is an issue with B520C-13, 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 B520C-13 part is unused and in its original packaging.
Return procedure for B520C-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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