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Diodes Incorporated B0520LWQ-7-F
- Part No.:
- B0520LWQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
B0520LWQ-7-F.pdf
- Description:
- DIODE SCHOTTKY 20V 500MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:12,678
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Product details
Overview
B0520LWQ-7-F from Diodes Incorporated is a 0.5A, 20V surface-mount Schottky barrier rectifier in SOD-123 package, featuring low forward voltage drop (0.300 V @ 0.1A, 25°C), AEC-Q101 qualification, and guard ring construction for transient protection. It serves as an output rectifier in low-voltage DC/DC converters and reverse-polarity protection circuits in automotive body electronics.
For engineers reviewing the B0520LWQ-7-F datasheet, B0520LWQ-7-F pinout, B0520LWQ-7-F application, or B0520LWQ-7-F equivalent, this part is selected for high-conductance, low-loss rectification in space-constrained 12V automotive subsystems where thermal performance (RθJA = 244°C/W) and reliability under transient stress are critical.
Technical Context
This Schottky diode operates with metal-semiconductor junction architecture enabling fast switching (no minority carrier storage) and low forward conduction loss. Its guard ring structure enhances ruggedness against voltage transients, while the SOD-123 package supports automated placement and reflow soldering on FR-4 PCBs with defined thermal pad layout.
Rated for continuous operation from –65°C to +125°C, it delivers 0.5A average rectified current with derating above 75°C ambient, and withstands 5.5A non-repetitive surge (8.3ms half-sine). Reverse leakage remains ≤250 µA at 20V/25°C and ≤8.0 mA at 20V/100°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse voltage; defines safe blocking capability in 12V automotive systems with load dump margin. |
| IF(AV) | 0.5 A - Continuous average forward current; supports compact power rails in infotainment and sensor modules. |
| VF | 0.300 V @ 0.1A, 25°C - Low conduction loss reduces heat generation and improves efficiency in low-voltage buck converter outputs. |
| IFSM | 5.5 A - Surge rating enables survival during cold-crank or jump-start events without failure. |
| RθJA | 244 °C/W - Thermal resistance measured on standard FR-4 board; informs heatsinking requirements for sustained 0.5A operation. |
| CT | 170 pF @ 0V - Junction capacitance impacts high-frequency switching noise and EMI filtering design in SMPS feedback paths. |
Pinout & Package
Package: SOD-123 - Surface-mount plastic package (UL 94V-0), 1.55 mm × 2.65 mm footprint, cathode-banded polarity, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or switch node); requires 0.25" × 1.0" copper pad for thermal relief. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; connected to higher-potential rail (e.g., input or output); uses larger 0.75" × 1.0" pad for heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at 0.1A/25°C | 0.300 V - Reduces conduction loss by >40% vs. comparable silicon diodes, lowering thermal stress in sealed enclosures. |
| AEC-Q101 qualified | Validated for automotive use - Ensures reliability across temperature cycling, humidity, and mechanical shock per IATF 16949 manufacturing controls. |
| Guard ring construction | Integrated edge termination - Suppresses premature avalanche breakdown during load dump transients (ISO 7637-2 Pulse 5a). |
| Halogen & antimony free | <900 ppm Br/Cl, <1000 ppm Sb - Meets automotive OEM green material specifications and end-of-life recycling requirements. |
Applications
| Automotive Body Control Module (BCM) | USB-C Power Delivery Input Protection |
|---|---|
Use Scenario: Reverse-polarity protection for 12V supply inputs in door module ECUs exposed to field wiring errors. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage during battery misconnection. Use Value: 0.300 V VF minimizes voltage drop across protection path, preserving headroom for downstream LDOs and microcontrollers. | Use Scenario: Input rectification and reverse-current blocking in 5V/3A USB-C PD sink designs. IC Role / Device Role / Timing Role: Low-loss DC path from buck converter output to Type-C port VBUS line. Use Value: 170 pF junction capacitance avoids high-frequency resonance with PD controller's CC line filters. |
| Industrial Sensor Node Power Supply | LED Lighting Driver Output Stage |
Use Scenario: Output rectifier in isolated flyback converter powering 3.3V/0.4A wireless sensor nodes. IC Role / Device Role / Timing Role: High-efficiency AC-to-DC conversion stage delivering regulated bias to RF transceivers. Use Value: 244°C/W RθJA allows full 0.5A load without external heatsink on standard 2-layer PCB. | Use Scenario: Reverse-current blocking in constant-current LED driver output to prevent backfeed during dimming transitions. IC Role / Device Role / Timing Role: Fast-recovery freewheeling path during PWM off-time with minimal stored charge. Use Value: Schottky architecture eliminates minority carrier tail current, reducing EMI during 1–20 kHz PWM switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB0520T1G (ON Semiconductor) | Same 20V/0.5A rating; VF = 0.45V @ 0.5A/25°C (higher by 65 mV); SOD-123 package. | Larger VF increases conduction loss in thermally constrained layouts; not AEC-Q101 qualified. | Select when automotive qualification is unnecessary and cost is primary driver. |
| SS12 (Micro Commercial Components) | 20V/1.0A rating; VF = 0.5V @ 1.0A/25°C; SOD-123 package; no AEC-Q101 or halogen-free certification. | Higher current rating but significantly higher VF and no automotive compliance limits use to non-safety-critical consumer power supplies. | Select only for non-automotive, non-green-material applications requiring higher current headroom. |
Compared with SB0520T1G and SS12, B0520LWQ-7-F uniquely combines AEC-Q101 qualification, halogen-free compliance, and the lowest VF (0.300 V @ 0.1A) in its class-making it the sole choice for thermally sensitive, safety-compliant automotive power rails.
Availability
B0520LWQ-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and USB-C power delivery input protection requiring stable component supply and long-term lifecycle assurance.
Supply support for B0520LWQ-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 B0520LWQ-7-F belongs to Diodes' automotive-qualified Schottky rectifier product line, engineered specifically for low-loss, high-reliability power conversion in 12V vehicle subsystems including lighting, infotainment, and ADAS sensors.
FAQ
Is B0520LWQ-7-F suitable for reflow soldering on lead-free PCB assemblies?
Yes. The device is fully RoHS 3 compliant and rated for lead-free reflow profiles per J-STD-020, with matte tin-plated terminals meeting MIL-STD-202 Method 208 solderability requirements. Its SOD-123 package withstands peak temperatures up to 260°C for 30 seconds.
What is the maximum operating temperature for continuous 0.5A current?
At 0.5A average forward current, the junction temperature must remain ≤125°C. With RθJA = 244°C/W and PD = IF × VF ≈ 0.5A × 0.33V = 165 mW, ambient temperature must be ≤125°C − (0.165W × 244°C/W) ≈ 85°C for safe operation without derating.
Does the guard ring construction provide protection against ISO 7637-2 transients?
Yes. The guard ring mitigates edge breakdown during high dv/dt events. Diodes specifies this feature to enhance robustness against ISO 7637-2 Pulse 1 (−150V/2Ω) and Pulse 5a (76V/10Ω) load dump transients common in 12V automotive networks.
How does B0520LWQ-7-F differ from the non-Q version B0520LW-7-F?
B0520LWQ-7-F is AEC-Q101 qualified, PPAP-capable, and manufactured in IATF 16949-certified facilities; B0520LW-7-F lacks automotive qualification, change control, and formal PPAP documentation-making the Q-suffix version mandatory for Tier 1 automotive production.
B0520LWQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- 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:
- 385 mV @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 250 µA @ 20 V
- Capacitance @ Vr, F:
- 170pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -65°C ~ 125°C
B0520LWQ-7-F FAQ
1.How can I place an order for B0520LWQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B0520LWQ-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 B0520LWQ-7-F reliable?
The price and inventory of B0520LWQ-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 B0520LWQ-7-F is usually 5 days.
3.What payment methods are accepted for B0520LWQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B0520LWQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B0520LWQ-7-F?
B0520LWQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B0520LWQ-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 B0520LWQ-7-F?
For technical support, including B0520LWQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B0520LWQ-7-F requirements.
6.How does Aetrix verify that B0520LWQ-7-F is sourced from the original manufacturer or authorized distributors?
All B0520LWQ-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 B0520LWQ-7-F meets industry standards.
7.What is the process for return or replacement of B0520LWQ-7-F?
All B0520LWQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with B0520LWQ-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 B0520LWQ-7-F part is unused and in its original packaging.
Return procedure for B0520LWQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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