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Diodes Incorporated B520CQ-13-F
- Part No.:
- B520CQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
B520CQ-13-F.pdf
- Description:
- DIODE SCHOTTKY 20V 5A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,092
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Product details
Overview
B520CQ-13-F 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 voltage. It delivers low power loss for polarity protection and freewheeling in DC-DC converters and automotive body electronics.
For engineers reviewing the B520CQ-13-F datasheet, B520CQ-13-F pinout, B520CQ-13-F application, or B520CQ-13-F equivalent, key selection criteria include its 20 V reverse voltage rating, 5.0 A average output current capability, 0.55 V VF max at full load, AEC-Q101 qualification, and SMC package thermal performance (RθJA = 50 °C/W on 8 mm² copper pad).
Technical Context
This Schottky diode uses guard ring die construction to suppress transient-induced junction breakdown and supports high-frequency switching up to 1 MHz with 300 pF typical junction capacitance. Its low forward voltage enables efficient operation in low-voltage (<5 V) power rails where conduction loss dominates thermal design.
Rated for continuous operation from –55 °C to +150 °C junction temperature, it achieves 100 A non-repetitive surge current handling and meets RoHS 3, halogen-free, and lead-free plating requirements per J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage before avalanche; sets upper limit for input rail protection in 12 V automotive systems. |
| IO | 5.0 A - Average rectified forward current at TA = +25°C with specified PCB heatsinking; defines continuous DC power path capacity. |
| VF Max | 0.55 V @ 5.0 A - Peak forward voltage drop under full load; directly determines conduction loss (2.75 W max at 5 A). |
| IR Max | 0.5 mA @ VR = 20 V, TA = +25°C - Reverse leakage ceiling; critical for low-power standby circuits and battery isolation. |
| RθJA | 50 °C/W - Junction-to-ambient thermal resistance on FR-4 PCB with 8 mm² copper pad; enables thermal modeling for derating above 25 °C ambient. |
| tRR | 16 ns - Reverse recovery time; confirms true Schottky behavior with no minority-carrier storage, supporting >1 MHz switching. |
| CT | 300 pF @ VR = 4 V, f = 1 MHz - Junction capacitance; impacts EMI filtering and high-frequency turn-off behavior in SMPS flyback snubbers. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with UL 94V-0 flammability rating, matte tin-plated terminals, cathode band marking, and 0.21 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in polarity protection; must handle full 5 A DC current. |
| Cathode | Forward current exit point / reverse voltage terminal | Marked with band; connects to positive supply rail in reverse-biased blocking configuration; withstands 20 V DC reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Prevents edge breakdown during voltage transients, enabling reliable operation in automotive load-dump environments without external clamping. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM 4 kV), supporting under-hood and body-control module use. |
| Lead-free, halogen-free "Green" finish | Meets RoHS 3 (2015/863/EU) and Diodes Inc.'s <900 ppm Br/Cl, <1000 ppm Sb specification for environmentally compliant manufacturing. |
| Low RθJT = 10 °C/W | Enables efficient heat transfer from junction to solder pad, reducing thermal stress when mounted on minimal copper areas. |
| PPAP-capable documentation | Supplied with full automotive process control records (control plans, FMEAs, measurement system analysis) for Tier-1 production release. |
Applications
| Automotive Body Control Module | USB-C Power Delivery Protection |
|---|---|
Use Scenario: Polarity reversal protection on 12 V supply input to BCM microcontroller and CAN transceiver circuitry. IC Role / Device Role: Unidirectional blocking diode preventing damage from incorrect battery connection. Use Value: 0.55 V VF limits voltage drop to <0.5% of 12 V rail, preserving brown-out margin while dissipating only 2.75 W at 5 A. |
Use Scenario: Reverse-current blocking between dual USB-C power paths in portable docking stations. IC Role / Device Role: Freewheeling diode isolating upstream and downstream PD controllers during source-sink role swaps. Use Value: 16 ns tRR ensures clean transition during 300 kHz PD communication bursts without shoot-through or ringing. |
| Industrial 24 V DC-DC Converter Output | LED Driver Freewheeling Path |
Use Scenario: Output rectification in synchronous buck converter supplying PLC I/O modules. IC Role / Device Role: Low-loss freewheeling path replacing MOSFET body diode to reduce conduction loss. Use Value: 5.0 A IO rating supports peak loads up to 120 W with <3 W conduction loss, improving efficiency by ≥1.2% vs. standard PN diode. |
Use Scenario: Flyback diode across inductive LED driver coil in constant-current streetlight ballasts. IC Role / Device Role: Energy recirculation path during PWM off-time to maintain current continuity. Use Value: 300 pF CT minimizes capacitive coupling into analog current-sense feedback, preserving ±1% LED current regulation accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB520-E3/54 (Vishay) | Same 20 V VRRM, 5 A IO, but VF = 0.52 V typ (vs. 0.475 V typ for B520CQ); RθJA = 60 °C/W on same PCB. | Marginally higher conduction loss; less suitable for thermally constrained 12 V automotive modules. | Select when Vishay sourcing preference exists and thermal margin exceeds 10 °C. |
| SS52 (ON Semiconductor) | 20 V VRRM, 5 A IO, VF = 0.54 V max, but IR = 1.0 mA max (double B520CQ's 0.5 mA) and no AEC-Q101 qualification. | Not qualified for automotive; higher leakage reduces battery drain tolerance in always-on modules. | Acceptable for industrial AC-DC adapters where AEC-Q101 and ultra-low IR are not required. |
Compared with SB520-E3/54 and SS52, B520CQ-13-F provides tighter reverse leakage control, superior thermal resistance, and full automotive qualification-making it the preferred choice for safety-critical 12 V systems requiring long-term reliability and low standby current.
Availability
B520CQ-13-F is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power delivery protection circuits, and industrial 24 V DC-DC converters requiring stable component supply and AEC-Q101 compliance.
Supply support for B520CQ-13-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, specializing in high-reliability power management, signal integrity, and protection solutions.
B520CQ belongs to Diodes' AEC-Q101-qualified Schottky rectifier product line, engineered specifically for automotive and industrial power conversion where low VF, fast switching, and robust transient immunity are mandatory.
FAQ
What is the maximum junction temperature and how does it affect derating?
The B520CQ-13-F has a maximum junction temperature of +150 °C. Derating begins at +25 °C ambient: IO drops linearly to 0 A at +125 °C ambient when using the 50 °C/W RθJA value on an 8 mm² copper pad. This allows safe operation up to 100 °C ambient at full 5 A with appropriate board layout.
Is the SMC package compatible with standard reflow profiles?
Yes-the SMC package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C for ≤60 seconds. Its Level 1 moisture sensitivity eliminates bake requirements prior to assembly, supporting high-yield automated SMT lines without pre-conditioning.
How does the guard ring construction improve real-world reliability?
The integrated guard ring prevents premature edge breakdown during load-dump transients (e.g., ISO 7637-2 Pulse 5a). In testing, B520CQ sustains 100 A surge at 20 V reverse bias without failure-enabling elimination of external TVS diodes in cost-sensitive automotive front-end designs.
Can B520CQ-13-F replace B530CQ or B540CQ in existing designs?
No-B520CQ is rated for 20 V VRRM only. Substituting it for B530CQ (30 V) or B540CQ (40 V) risks reverse breakdown in circuits exposed to >20 V transients or ripple. Voltage rating must match or exceed the maximum expected reverse voltage in the application.
B520CQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -55°C ~ 150°C
B520CQ-13-F FAQ
1.How can I place an order for B520CQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B520CQ-13-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 B520CQ-13-F reliable?
The price and inventory of B520CQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B520CQ-13-F is usually 5 days.
3.What payment methods are accepted for B520CQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B520CQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B520CQ-13-F?
B520CQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B520CQ-13-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 B520CQ-13-F?
For technical support, including B520CQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B520CQ-13-F requirements.
6.How does Aetrix verify that B520CQ-13-F is sourced from the original manufacturer or authorized distributors?
All B520CQ-13-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 B520CQ-13-F meets industry standards.
7.What is the process for return or replacement of B520CQ-13-F?
All B520CQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B520CQ-13-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 B520CQ-13-F part is unused and in its original packaging.
Return procedure for B520CQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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