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Diodes Incorporated SD103CW-13
- Part No.:
- SD103CW-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SD103CW-13.pdf
- Description:
- SCHOTTKY SOD123F 20V 0.35A 125C
- Quantity:
- Payment:
- Shipping:
Inventory:2,022
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Product details
Overview
SD103CW-13 from Diodes Incorporated is a 20 V, 0.2 A surface-mount Schottky barrier diode in SOD123 package, featuring 0.60 V max forward voltage at 200 mA, 5.0 µA max reverse leakage at 10 V, and 6 ns reverse recovery time-designed for low-loss rectification in compact DC-DC converters and polarity protection circuits.
For engineers reviewing the SD103CW-13 datasheet, SD103CW-13 pinout, SD103CW-13 application, or SD103CW-13 equivalent, key selection criteria include its 20 V reverse rating, SOD123 thermal resistance (340 °C/W), cathode-band polarity marking, and suitability for high-efficiency 3.3 V/5 V rail rectification where low VF and fast switching are critical.
Technical Context
This Schottky diode uses guard ring construction to enhance transient robustness and suppress edge breakdown under repetitive reverse stress. Its low 0.60 V VF at 200 mA directly reduces conduction loss in continuous forward-biased operation, while the 6 ns tRR enables stable performance in 1–3 MHz switching topologies.
The device operates across –55 °C to +150 °C with 367 mW power dissipation on FR-4 board, and exhibits 28 pF junction capacitance at 0 V bias-enabling predictable EMI behavior in high-frequency flyback and buck converter catch diode roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum blocking voltage before avalanche; sets upper limit for input rail compatibility in 12 V systems. |
| IF | 0.2 A average - Continuous rectified current rating; supports 3.3 V/5 V output stages up to ~1 W load. |
| VF Max | 0.60 V @ 200 mA - Low conduction loss ensures ≥92% efficiency in 5 V-to-3.3 V synchronous rectifier alternatives. |
| IR Max | 5.0 µA @ 10 V - Minimal leakage preserves battery life in always-on backup rails and low-power sleep modes. |
| tRR | 6 ns - Fast recovery minimizes switching node ringing and reduces snubber losses in >1 MHz SMPS designs. |
| CT | 28 pF @ 0 V - Predictable junction capacitance aids EMI filter design and layout parasitic estimation. |
| RθJA | 340 °C/W - Thermal resistance defines derating curve; limits ambient operation to ≤125 °C at full 0.2 A load. |
Pinout & Package
Package: SOD123 - Surface-mount plastic case (1.55 mm × 2.65 mm × 1.05 mm), cathode marked by band, matte tin-plated alloy 42 leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node or ground return) in freewheeling paths. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to output rail or positive supply in clamp/polarity protection configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.60 V max at 200 mA - Reduces I²R loss by >40% vs. standard PN diodes in 5 V buck outputs. |
| Guard ring construction | Edge termination architecture - Improves surge tolerance and prevents premature breakdown at high dv/dt. |
| Lead-free & RoHS 3 compliant | No intentionally added lead, <900 ppm Br/Cl, <1000 ppm Sb - Meets IPC-J-STD-020 and automotive change-control requirements. |
| SOD123 thermal profile | 340 °C/W RθJA on FR-4 - Enables direct replacement of legacy DO-35 or SMA parts without heatsink redesign. |
Applications
| USB Power Delivery Clamp | IoT Sensor Rail Protection |
|---|---|
Use Scenario: Prevents damage from reversed USB-C cable insertion in portable chargers and PD sink adapters. IC Role / Device Role / Timing Role: Polarity protection diode placed between VBUS input and downstream PMIC. Use Value: 0.60 V VF limits voltage drop to <3% at 200 mA, preserving 4.75 V minimum for USB 2.0 signaling compliance. | Use Scenario: Isolates coin-cell backup supply from main 3.3 V MCU rail during brownout events. IC Role / Device Role / Timing Role: Reverse-blocking element in low-leakage backup path. Use Value: 5.0 µA IR at 10 V extends 220 mAh CR2032 battery life beyond 10 years in deep-sleep mode. |
| DC-DC Buck Converter Catch Diode | Industrial 24 V Input Rectification |
Use Scenario: Freewheeling path in non-synchronous 1.2 MHz buck regulator powering FPGA core logic. IC Role / Device Role / Timing Role: High-speed catch diode replacing synchronous MOSFET in cost-sensitive designs. Use Value: 6 ns tRR suppresses voltage spikes above 30 V, eliminating need for external RC snubber. | Use Scenario: Input rectification stage in DIN-rail mounted PLC I/O module with 24 V ±15% supply. IC Role / Device Role / Timing Role: Primary AC-to-DC front-end rectifier in bridgeless half-wave configuration. Use Value: 20 V VRRM safely handles 24 V transients per IEC 61000-4-4 (±2 kV EFT) when paired with TVS clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB120-E3/54 (Vishay) | 20 V VRRM, 1 A IF, 0.55 V VF @ 1 A, SOD-123 package | Higher current rating but larger forward drop at low IF; optimized for 500 mA+ loads | Select when system requires >0.3 A average current and can accommodate higher thermal mass. |
| BAT54CWS-7-F (Diodes Inc.) | 30 V VRRM, 0.2 A IF, 0.33 V VF @ 10 mA, dual common-cathode SOT-323 | Dual-diode configuration with lower VF at microamp bias; not pin-compatible | Choose for space-constrained dual-rail clamping where 30 V margin and ultra-low standby leakage are prioritized. |
Compared with SB120-E3/54 and BAT54CWS-7-F, SD103CW-13 delivers optimal balance of low-cost SOD123 footprint, 0.2 A capability, and 5.0 µA leakage at 10 V-making it preferred for single-rail 3.3 V/5 V rectification where thermal budget and bill-of-materials simplicity are primary constraints.
Availability
SD103CW-13 is available at Aetrix Electronics and suitable for USB power delivery clamps, IoT sensor rail protection, and DC-DC buck converter catch diode applications requiring stable component supply and consistent SOD123 form factor.
Supply support for SD103CW-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-sensitive, high-volume applications demanding low VF, fast recovery, and reliable SOD123 assembly in consumer, computing, and industrial power supplies.
FAQ
What is the maximum junction temperature for SD103CW-13?
The SD103CW-13 has an operating junction temperature range of –55 °C to +150 °C. This rating is validated per JEDEC JESD22-A104 and applies under specified thermal conditions: 367 mW power dissipation on FR-4 board with recommended pad layout. Derating begins above 25 °C ambient at 1.09 mW/°C.
Is SD103CW-13 qualified for automotive use?
SD103CW-13 is not AEC-Q101 qualified. While manufactured in IATF 16949-certified facilities and fully RoHS 3 compliant, it lacks the extended temperature validation, failure analysis reporting, and PPAP documentation required for automotive applications. For AEC-Q101 variants, contact Diodes Incorporated directly.
How does the SOD123 package affect PCB layout?
The SOD123 footprint requires 0.90 mm × 4.05 mm copper pads with 0.95 mm spacing, per Diodes' recommended layout. Its low 0.01 g mass and 1.05 mm height enable high-density placement, but thermal relief must be minimized on cathode pad to maintain 340 °C/W RθJA performance in sustained 0.2 A operation.
Can SD103CW-13 replace SD103AW or SD103BW in existing designs?
SD103CW-13 is not a direct replacement for SD103AW (40 V) or SD103BW (30 V) due to its lower 20 V VRRM. Substitution is only safe if the circuit's peak reverse voltage never exceeds 15 V-verified by worst-case transient analysis. Exceeding 20 V risks avalanche failure and irreversible degradation.
SD103CW-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):
- 20 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 @ 10 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
SD103CW-13 FAQ
1.How can I place an order for SD103CW-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103CW-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 SD103CW-13 reliable?
The price and inventory of SD103CW-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD103CW-13 is usually 5 days.
3.What payment methods are accepted for SD103CW-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103CW-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103CW-13?
SD103CW-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103CW-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 SD103CW-13?
For technical support, including SD103CW-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103CW-13 requirements.
6.How does Aetrix verify that SD103CW-13 is sourced from the original manufacturer or authorized distributors?
All SD103CW-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 SD103CW-13 meets industry standards.
7.What is the process for return or replacement of SD103CW-13?
All SD103CW-13 units undergo pre-shipment inspection (PSI). If there is an issue with SD103CW-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 SD103CW-13 part is unused and in its original packaging.
Return procedure for SD103CW-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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