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Diodes Incorporated SD103CWS-7
- Part No.:
- SD103CWS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD103CWS-7.pdf
- Description:
- DIODE SCHOTTKY 20V 350MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,631
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Product details
Overview
SD103CWS-7 from Diodes Incorporated is a surface-mount Schottky barrier diode rated for 20 V reverse voltage, 350 mA forward current, and 0.37 V max forward voltage at 20 mA, with 5.0 µA max reverse leakage at 10 V. It features negligible reverse-recovery time (6 ns), low capacitance (35 pF), and is qualified to AEC-Q standards for automotive use as a polarity protection or recirculating diode.
For engineers reviewing the SD103CWS-7 datasheet, SD103CWS-7 pinout, SD103CWS-7 application, or SD103CWS-7 equivalent, key selection criteria include its 20 V VR, 350 mA IF, ultra-low VF, SOD323 package footprint, and AEC-Q-compliant reliability for space-constrained automotive power rails.
Technical Context
This Schottky diode uses guard ring construction to enhance transient robustness and suppress leakage under reverse bias. Its metal-semiconductor junction enables near-zero reverse recovery charge and fast switching in high-frequency DC/DC feedback paths and flyback snubbing circuits.
The device operates across –65 °C to +125 °C, with thermal resistance of 625 °C/W (junction-to-ambient) on standard 25 mm² copper pad, and derates linearly to zero power dissipation above +125 °C ambient per Fig. 4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (DC Blocking) | 20 V - Maximum continuous reverse voltage before breakdown; sets safe operating margin in 12 V automotive systems. |
| IF (Continuous) | 350 mA - Steady-state forward current rating; supports moderate-power load switching and clamping. |
| VF @ 20 mA | 0.37 V max - Low conduction loss reduces heat generation and improves efficiency in low-voltage bias networks. |
| IR @ VR | 5.0 µA max at 10 V - Tight leakage spec ensures minimal standby current in always-on vehicle modules. |
| tRR | 6 ns - Near-instantaneous turn-off enables clean switching in >1 MHz DC/DC converters without ringing. |
| CT | 35 pF @ 0 V - Low junction capacitance preserves signal integrity in high-speed clamp and ESD protection roles. |
Pinout & Package
Package: SOD323 - ultra-small plastic surface-mount package (1.30 × 1.70 × 0.90 mm), cathode-banded, matte tin-plated leads, JEDEC-compliant moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to positive supply or switched node; low-resistance path when forward-biased. |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to ground or return path; blocks up to 20 V reverse voltage with <5 µA leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Enhances ESD and surge immunity without increasing VF or leakage-critical for automotive transients. |
| Negligible reverse-recovery time | 6 ns tRR eliminates switching losses and voltage spikes in high-frequency buck converter freewheeling paths. |
| Ultra-small SOD323 footprint | 1.3 × 1.7 mm outline saves PCB area in dense ADAS sensor modules and body control units. |
| AEC-Q qualified reliability | Meets JEDEC stress test requirements for automotive grade; validated for –65 °C to +125 °C operation. |
Applications
| Engine Control Unit (ECU) Power Rail Protection | Automotive LED Lighting Driver |
|---|---|
Use Scenario: Reverse-polarity protection on 12 V input to microcontroller power management ICs. IC Role / Device Role: Unidirectional blocking diode preventing damage during battery misconnection. Use Value: 0.37 V VF minimizes voltage drop and thermal rise at 350 mA, preserving headroom for LDO regulation. | Use Scenario: Recirculation path for inductive current in PWM-driven LED strings. IC Role / Device Role: Freewheeling diode across LED driver MOSFET output stage. Use Value: 6 ns tRR prevents shoot-through and reduces EMI during 10–100 kHz PWM switching. |
| Body Control Module (BCM) Signal Clamping | Infotainment System USB Port Protection |
Use Scenario: Clamp transient overvoltage on LIN bus or sensor analog inputs. IC Role / Device Role: Low-capacitance Schottky clamp to ground or rail. Use Value: 35 pF CT avoids signal distortion on sub-MHz communication lines while handling ±2 kV ESD. | Use Scenario: Polarity protection on 5 V USB VBUS line feeding infotainment power management. IC Role / Device Role: Series-blocking diode ensuring correct voltage polarity to downstream PMIC. Use Value: AEC-Q qualification guarantees long-term stability in thermally cycled dashboard environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54LT1G | Same SOD323 package; 30 V VR, 200 mA IF, 0.45 V VF @ 10 mA | Lower current rating limits use in >200 mA recirculation paths | Select when higher reverse voltage margin is needed but peak current stays below 200 mA. |
| NSR0230HT1G | SOD-123 package; 30 V VR, 300 mA IF, 0.35 V VF @ 20 mA | Larger footprint (2.9 × 1.3 mm) and different pad layout | Choose only if board redesign accommodates larger SOD-123 and higher VR is required. |
Compared with SBAT54LT1G and NSR0230HT1G, SD103CWS-7 offers the lowest forward voltage (0.37 V) at 20 mA among SOD323-packaged 20 V Schottkys, with verified AEC-Q compliance-making it optimal for thermally constrained, high-reliability 12 V automotive nodes where both efficiency and qualification matter.
Availability
SD103CWS-7 is available at Aetrix Electronics and suitable for engine control units, LED lighting drivers, body control modules, and infotainment system power rails requiring stable component supply and automotive-grade reliability.
Supply support for SD103CWS-7 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-performance, high-reliability components for automotive, industrial, and consumer markets.
The SD103xWS series belongs to Diodes' automotive-qualified Schottky diode product line, engineered specifically for polarity protection, recirculation, and clamping in harsh-environment 12 V vehicle electrical systems.
FAQ
What is the maximum junction temperature for SD103CWS-7?
The SD103CWS-7 has an operating junction temperature range of –65 °C to +125 °C. Its thermal resistance is 625 °C/W (junction-to-ambient) on a standard 25 mm² copper pad. Derating begins at +25 °C ambient, reaching zero power dissipation at +125 °C per the published curve (Fig. 4).
Is SD103CWS-7 suitable for use in USB Type-C power delivery circuits?
No-SD103CWS-7 is rated for 20 V DC blocking and is not designed for the dynamic voltage, current, and fault conditions of USB PD (which requires ≥20 V VR, but also specific ESD ratings, bidirectional capability, and protocol-aware protection). It may serve only as basic polarity protection on fixed 5 V or 9 V auxiliary rails, not on full PD lanes.
Does SD103CWS-7 have a specified avalanche energy rating?
No-SD103CWS-7 is not rated for repetitive avalanche operation. Its guard ring construction improves transient robustness, but the datasheet does not specify single-pulse or repetitive avalanche energy (EAS). For inductive switching with unclamped energy, external snubbers or TVS devices are required.
Can SD103CWS-7 replace SD103AWS-7 in a design?
No-SD103AWS-7 is rated for 40 V VR, while SD103CWS-7 is rated for 20 V. Substituting the lower-voltage part risks reverse breakdown in circuits where transient spikes exceed 20 V. The forward characteristics and package are identical, but voltage rating is not interchangeable without circuit revalidation.
SD103CWS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- 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-323
- Operating Temperature - Junction:
- -65°C ~ 125°C
SD103CWS-7 FAQ
1.How can I place an order for SD103CWS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103CWS-7 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 SD103CWS-7 reliable?
The price and inventory of SD103CWS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD103CWS-7 is usually 5 days.
3.What payment methods are accepted for SD103CWS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103CWS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103CWS-7?
SD103CWS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103CWS-7 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 SD103CWS-7?
For technical support, including SD103CWS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103CWS-7 requirements.
6.How does Aetrix verify that SD103CWS-7 is sourced from the original manufacturer or authorized distributors?
All SD103CWS-7 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 SD103CWS-7 meets industry standards.
7.What is the process for return or replacement of SD103CWS-7?
All SD103CWS-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD103CWS-7, 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 SD103CWS-7 part is unused and in its original packaging.
Return procedure for SD103CWS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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