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Diodes Incorporated SD103BW-13
- Part No.:
- SD103BW-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SD103BW-13.pdf
- Description:
- SCHOTTKY SOD123F 30V 0.35A 125C
- Quantity:
- Payment:
- Shipping:
Inventory:4,992
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Product details
Overview
SD103BW-13 from Diodes Incorporated is a 30 V, 0.2 A surface-mount Schottky barrier diode in SOD123 package, featuring 0.60 V max forward voltage at 200 mA and 5.0 µA max reverse leakage at 20 V. It serves as a low-loss rectifier in DC-DC converters, polarity protection circuits, and low-voltage power supplies where fast switching and thermal efficiency are critical.
For engineers reviewing the SD103BW-13 datasheet, SD103BW-13 pinout, SD103BW-13 application, or SD103BW-13 equivalent, key selection criteria include its 30 V reverse rating, 0.60 V VF ceiling at full rated current, 6 ns reverse recovery time, SOD123 footprint compatibility, and suitability for space-constrained, high-efficiency 5–12 V rail designs.
Technical Context
This Schottky diode uses a planar epitaxial construction with guard ring termination to suppress edge breakdown and improve transient robustness. Its low junction capacitance (28 pF at 0 V) and sub-6 ns reverse recovery support high-frequency operation in synchronous rectification and flyback snubbing.
The device operates across –55 °C to +150 °C with 340 °C/W junction-to-ambient thermal resistance on FR-4 board, enabling reliable performance in thermally demanding environments without heatsinking at ≤200 mA DC load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in polarity protection and clamp applications |
| IF (DC) | 0.2 A - Continuous forward current rating; supports stable rectification in compact 5–12 V DC-DC outputs |
| VF Max | 0.60 V @ 200 mA - Low conduction loss enables >92% efficiency in 3.3–5 V buck converter secondary side |
| IR Max | 5.0 µA @ 20 V - Ultra-low leakage preserves battery life in always-on backup rails and IoT sleep modes |
| tRR | 6 ns - Fast recovery minimizes switching loss and EMI in >500 kHz SMPS topologies |
| CT | 28 pF @ 0 V - Low junction capacitance reduces capacitive loading on high-speed gate drivers and signal lines |
| RθJA | 340 °C/W - Thermal resistance confirms self-heating remains <70 °C rise at 0.2 A on standard FR-4 pad layout |
Pinout & Package
Package: SOD123 - Surface-mount plastic package (1.55 mm × 2.65 mm × 1.05 mm), cathode-banded, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side in rectifier configuration; requires low-impedance trace for minimal IR drop |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output/load side; band orientation must match PCB silkscreen for automated assembly verification |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.60 V max at 200 mA - Reduces power dissipation to ≤120 mW, eliminating need for thermal relief in dense layouts |
| Guard ring construction | Edge termination design - Improves surge tolerance and prevents premature avalanche at high dv/dt edges |
| SOD123 footprint | Standardized 1.55 mm × 2.65 mm outline - Enables direct replacement of industry-standard 0.2 A Schottkys without PCB redesign |
| Lead-free & Halogen-free | Meets RoHS 3 (2015/863/EU) and "Green" definition (<900 ppm Br+Cl, <1000 ppm Sb) - Complies with automotive and industrial environmental mandates |
Applications
| USB Power Delivery Protection | 5 V Buck Converter Output Rectifier |
|---|---|
Use Scenario: Prevents reverse current flow from powered USB-C port into host system during hot-plug events. IC Role / Device Role / Timing Role: Polarity protection diode placed between VBUS and system input rail. Use Value: 0.60 V VF limits voltage drop to <3% at 200 mA, preserving PD negotiation margin while blocking >20 V fault transients. | Use Scenario: Secondary-side rectifier in 5 V, 1 A non-synchronous buck converter for microcontroller power supply. IC Role / Device Role / Timing Role: Freewheeling path during low-side switch off-time. Use Value: 6 ns tRR and 28 pF CT minimize switching loss and ringing, sustaining >90% efficiency at 1 MHz switching frequency. |
| IoT Sensor Node Battery Backup | Industrial 24 V DC Input Clamp |
Use Scenario: Isolates primary Li-ion battery from supercapacitor backup rail during main power failure. IC Role / Device Role / Timing Role: OR-ing diode ensuring seamless switchover with minimal voltage sag. Use Value: 5.0 µA IR at 20 V extends shelf life of coin-cell-backed sensors beyond 10 years in storage. | Use Scenario: Reverse-polarity clamp on 24 V industrial PLC input terminals exposed to field wiring errors. IC Role / Device Role / Timing Role: Fault-current limiter during accidental –24 V connection. Use Value: 30 V VRRM withstands 150% of nominal rail with margin; 1.5 A IFSM handles brief miswiring surges without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR0530T1G (ON Semiconductor) | Same 30 V VRRM, but 0.45 V VF typ @ 0.5 A; higher 0.5 A IF rating; DO-214AC package | Requires larger PCB area; better suited for higher-current 3.3/5 V rails where thermal headroom exists | Select when forward loss reduction outweighs size constraints and board space permits DO-214AC footprint |
| SS13 (Good-Ark) | 30 V VRRM, 0.5 V VF max @ 300 mA; SOD-123 package; 10 µA IR @ 20 V | Higher leakage may impact ultra-low-power sleep modes; identical footprint enables drop-in replacement | Choose for cost-sensitive volume production where 5 µA vs. 10 µA leakage is not critical to system standby budget |
Compared with MBR0530T1G and SS13, SD103BW-13 delivers optimal balance of ultra-low leakage (5 µA), compact SOD123 size, and proven thermal performance on FR-4-making it preferred for space-limited, battery-aware, and thermally constrained 0.2 A rectification tasks.
Availability
SD103BW-13 is available at Aetrix Electronics and suitable for USB power delivery protection, 5 V buck converter output rectification, IoT sensor node battery backup, and industrial 24 V DC input clamp requiring stable component supply and consistent SOD123 form factor.
Supply support for SD103BW-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 SD103x series belongs to Diodes' general-purpose Schottky rectifier product line, engineered specifically for cost-effective, high-reliability low-voltage rectification and polarity protection in consumer, industrial, and computing power systems.
FAQ
What is the maximum continuous forward current for SD103BW-13 at 75°C ambient?
At 75°C ambient temperature, the SD103BW-13 supports 0.17 A continuous forward current, derived from its derating curve (Fig. 4), which shows linear reduction from 0.2 A at 25°C to zero at 150°C. This value assumes mounting on FR-4 with Diodes' recommended pad layout per DS11013.
Does SD103BW-13 meet AEC-Q101 qualification for automotive use?
No-SD103BW-13 is not AEC-Q101 qualified. The datasheet explicitly states that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing; this part is intended for commercial and industrial applications only.
Can SD103BW-13 replace SD103AW in a 40 V circuit?
No-SD103BW-13 has a 30 V peak repetitive reverse voltage (VRRM), making it unsuitable for 40 V circuits. Using it in such a design risks premature breakdown and catastrophic failure under normal operating voltage stress.
What is the typical forward voltage at 20 mA, and why does the datasheet list two VF values?
The typical forward voltage is 0.37 V at 20 mA (per Electrical Characteristics table). The 0.60 V maximum is specified at 200 mA to guarantee worst-case conduction loss under full-rated current-enabling accurate thermal and efficiency modeling across the entire operating range.
SD103BW-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 350mA
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 200 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 10 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 20 V
- Capacitance @ Vr, F:
- 28pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -65°C ~ 125°C
SD103BW-13 FAQ
1.How can I place an order for SD103BW-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103BW-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 SD103BW-13 reliable?
The price and inventory of SD103BW-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD103BW-13 is usually 5 days.
3.What payment methods are accepted for SD103BW-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103BW-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103BW-13?
SD103BW-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103BW-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 SD103BW-13?
For technical support, including SD103BW-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103BW-13 requirements.
6.How does Aetrix verify that SD103BW-13 is sourced from the original manufacturer or authorized distributors?
All SD103BW-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 SD103BW-13 meets industry standards.
7.What is the process for return or replacement of SD103BW-13?
All SD103BW-13 units undergo pre-shipment inspection (PSI). If there is an issue with SD103BW-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 SD103BW-13 part is unused and in its original packaging.
Return procedure for SD103BW-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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