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Diodes Incorporated B550CQ-13-F
- Part No.:
- B550CQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
B550CQ-13-F.pdf
- Description:
- DIODE SCHOTTKY 50V 5A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,057
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Product details
Overview
B550CQ-13-F from Diodes Incorporated is a 50 V, 5.0 A surface-mount Schottky barrier rectifier in SMC package, featuring 0.70 V max forward voltage at 5.0 A and 0.5 mA max reverse leakage at rated VR, optimized for low-voltage, high-frequency polarity protection and freewheeling in DC/DC converters and power supplies.
For engineers reviewing the B550CQ-13-F datasheet, B550CQ-13-F pinout, B550CQ-13-F application, or B550CQ-13-F equivalent, key selection criteria include its AEC-Q101 qualification, 10 °C/W junction-to-terminal thermal resistance, RoHS-compliant lead-free finish, and suitability for automotive-grade polarity protection and recirculating diode functions where low conduction loss and fast switching are critical.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient robustness and supports automated SMT assembly with matte tin-plated terminals solderable per MIL-STD-202. Its 50 V peak repetitive reverse voltage and 100 A non-repetitive surge rating enable reliable operation in inductive load switching circuits.
The device delivers stable performance across -55°C to +150°C operating range, with thermal resistance of 30 °C/W when mounted on a 50 mm × 50 mm × 23 mm aluminum heatsink - enabling sustained 5.0 A average output current under controlled thermal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum reverse blocking capability without breakdown in repetitive AC or DC applications. |
| IO | 5.0 A - Continuous average forward current rating at TA = +25°C with specified PCB heatsinking. |
| VF Max | 0.70 V @ IF = 5.0 A - Low conduction loss enabling high-efficiency operation in low-voltage power rails. |
| IR Max | 0.5 mA @ VR = 50 V, TA = +25°C - Minimal leakage ensures stable DC blocking in battery-powered and standby circuits. |
| tRR | 16 ns - Fast recovery time minimizes switching losses in high-frequency inverters and SMPS freewheeling paths. |
| RθJT | 10 °C/W - Low junction-to-terminal thermal resistance supports direct thermal coupling to copper pads or heatsinks. |
| CT | 300 pF @ VR = 4 V, f = 1 MHz - Low junction capacitance preserves high-frequency response in RF and fast-switching applications. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with UL 94V-0 flammability rating, 0.21 g weight, cathode indicated by band or notch.
| 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; accepts input during forward conduction. |
| Cathode | Forward current exit point | Connected to higher-potential side (e.g., supply rail); provides unidirectional current flow and reverse blocking. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Enhances ESD robustness (HBM 4000 V) and improves surge immunity in automotive transients. |
| AEC-Q101 qualification | Validated for automotive electronics use, including engine control modules and body electronics requiring high reliability. |
| Lead-free, halogen- and antimony-free | Meets RoHS 3 (2015/863/EU) and "Green" compliance with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb. |
| Low RθJA with heatsink | 30 °C/W with 50 mm × 50 mm × 23 mm Al heatsink enables full 5.0 A current handling at TJ ≤ 125°C. |
Applications
| Automotive Polarity Protection | DC/DC Converter Freewheeling |
|---|---|
|
Use Scenario: Reverse-battery connection protection in 12 V vehicle infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage to downstream regulators and microcontrollers. Use Value: 0.70 V VF limits power dissipation to ≤3.5 W at 5 A, reducing thermal stress versus silicon rectifiers. |
Use Scenario: Flyback diode in synchronous buck converter output stage for industrial PLC power modules. IC Role / Device Role / Timing Role: Recirculating current path during high-side switch off-time to maintain continuous inductor current. Use Value: 16 ns tRR and low CT minimize switching loss and ringing, improving efficiency above 200 kHz operation. |
| USB-C Power Delivery Clamp | Low-Voltage Motor Drive Recirculation |
|
Use Scenario: Overvoltage clamp and reverse-current blocking in USB-C PD sink designs with dual-role ports. IC Role / Device Role / Timing Role: Bidirectional protection element ensuring safe hot-plug and cable reversal tolerance. Use Value: 50 V VRRM exceeds USB PD 3.0 20 V max, while 0.5 mA IR prevents standby current drain in always-on circuits. |
Use Scenario: Back-EMF suppression diode in 24 V brushed DC motor drivers for HVAC actuators. IC Role / Device Role / Timing Role: Energy recapture path during PWM turn-off to limit voltage spikes across H-bridge MOSFETs. Use Value: 100 A IFSM withstands motor stall surges; SMC package allows compact layout near motor driver ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB550-E3/54 (Vishay) | Same 50 V VRRM, 5 A IO, but VF = 0.75 V max @ 5 A; TO-277 package (smaller footprint, no leads). | Lacks AEC-Q101 qualification; not PPAP-capable; unsuitable for automotive production. | Select when space-constrained board layout is prioritized over automotive compliance. |
| SS5P5L (ON Semiconductor) | 50 V VRRM, 5 A IO, VF = 0.55 V typ @ 5 A; SMC package; AEC-Q101 qualified but IR = 1.0 mA @ 25°C. | Higher leakage reduces effectiveness in battery-critical low-power sleep modes. | Prefer for ultra-low VF requirements where leakage < 0.5 mA is not mandatory. |
Compared with SB550-E3/54 and SS5P5L, B550CQ-13-F uniquely balances AEC-Q101 compliance, 0.5 mA leakage ceiling, and SMC manufacturability - making it optimal for automotive and industrial systems demanding both reliability and consistent low-leakage behavior.
Availability
B550CQ-13-F is available at Aetrix Electronics and suitable for automotive ECUs, industrial DC/DC converters, and USB-C power delivery systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for B550CQ-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
B550CQ-13-F belongs to the B520CQ–B560CQ Schottky rectifier family engineered for commercial and automotive-grade polarity protection, freewheeling, and switching applications where low VF, fast recovery, and AEC-Q101 reliability are essential.
FAQ
What is the maximum junction temperature for continuous operation of B550CQ-13-F?
The device supports continuous operation up to +150°C junction temperature, verified per AEC-Q101 stress testing. Derating curves in the datasheet show 5.0 A IO is sustainable at TA = +75°C with 50 mm × 50 mm × 23 mm heatsink, and down to ~2.5 A at TA = +100°C with standard FR-4 mounting.
Is B550CQ-13-F suitable for reflow soldering per J-STD-020?
Yes - B550CQ-13-F is rated for moisture sensitivity level 1 (MSL-1), meaning it can be stored indefinitely at ≤30°C/85% RH and subjected to standard Pb-free reflow profiles (peak 260°C, 20–40 sec) without preconditioning or baking.
How does the guard ring die construction improve real-world reliability?
The guard ring mitigates edge breakdown under voltage transients, increasing ESD tolerance (HBM 4000 V) and sustaining 100 A IFSM surges. In automotive load-dump tests, this structure reduces field failure rates by limiting localized thermal runaway at the PN junction periphery.
Can B550CQ-13-F replace B540CQ in existing designs?
No - B540CQ has 40 V VRRM and 0.55 V VF max, while B550CQ-13-F has 50 V VRRM and 0.70 V VF max. Substitution requires verifying that 50 V blocking margin is acceptable and that the 0.15 V higher VF does not exceed thermal budget in the target application.
B550CQ-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):
- 50 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 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
B550CQ-13-F FAQ
1.How can I place an order for B550CQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B550CQ-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 B550CQ-13-F reliable?
The price and inventory of B550CQ-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 B550CQ-13-F is usually 5 days.
3.What payment methods are accepted for B550CQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B550CQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B550CQ-13-F?
B550CQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B550CQ-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 B550CQ-13-F?
For technical support, including B550CQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B550CQ-13-F requirements.
6.How does Aetrix verify that B550CQ-13-F is sourced from the original manufacturer or authorized distributors?
All B550CQ-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 B550CQ-13-F meets industry standards.
7.What is the process for return or replacement of B550CQ-13-F?
All B550CQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B550CQ-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 B550CQ-13-F part is unused and in its original packaging.
Return procedure for B550CQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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