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Diodes Incorporated SD103CWS-7-F
- Part No.:
- SD103CWS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD103CWS-7-F.pdf
- Description:
- DIODE SCHOTTKY 20V 350MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,899
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Product details
Overview
SD103CWS-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode rated for 20 V peak 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 reverse capacitance (35 pF), and guard ring construction for transient protection-designed specifically for automotive polarity protection and recirculation in compact DC/DC and power management circuits.
For engineers reviewing the SD103CWS-7-F datasheet, SD103CWS-7-F pinout, SD103CWS-7-F application, or SD103CWS-7-F equivalent, key selection criteria include its 20 V VR, 0.37 V VF at 20 mA, SOD323 package footprint, AEC-Q-compliant reliability, and suitability for low-loss flyback and reverse-polarity protection in space-constrained automotive ECUs and body control modules.
Technical Context
This Schottky diode operates with metal-semiconductor junction architecture to eliminate minority-carrier storage delay, enabling true zero reverse-recovery charge and sub-6 ns switching. Its guard ring structure enhances ESD and surge robustness without compromising low VF performance.
The device is characterized 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 at 125°C ambient per Fig. 4 in DS30101 Rev. 22-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (V) | 20 V - Maximum DC blocking voltage; sets upper limit for reverse-bias operation in polarity protection circuits. |
| IFM (mA) | 350 mA - Continuous forward current rating; defines steady-state load-handling capability in recirculation paths. |
| VF MAX (V) | 0.37 V @ 20 mA - Low conduction loss ensures minimal power dissipation and heat generation in battery-fed systems. |
| IR MAX (µA) | 5.0 µA @ 10 V - Ultra-low leakage preserves battery life in always-on automotive modules. |
| tRR (ns) | 6 ns - Enables high-frequency switching in synchronous rectification and fast-decay motor drivers. |
| CT (pF) | 35 pF @ 0 V - Minimizes capacitive loading in signal-path clamping and RF-adjacent power rails. |
Pinout & Package
Package: SOD323 - ultra-small surface-mount plastic package (1.30 × 1.70 × 0.90 mm), moisture sensitivity level 1, matte tin-plated terminals, cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to positive supply or switched node; must handle 350 mA continuous and 1.5 A surge. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; tied to ground or return path; blocks up to 20 V reverse bias with <5 µA leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Enhances ESD immunity and transient surge tolerance without increasing VF or leakage. |
| Negligible reverse-recovery time | 6 ns tRR eliminates switching losses and ringing in high-speed DC/DC feedback loops. |
| Low reverse capacitance | 35 pF enables use in noise-sensitive analog power domains adjacent to RF or CAN transceivers. |
| Automotive qualification | AEC-Q200 compliant per JEDEC standards; qualified for under-hood and body-control module deployment. |
Applications
| Automotive Polarity Protection | DC/DC Converter Recirculation |
|---|---|
Use Scenario: Reverse-voltage protection on 12 V battery input to infotainment head unit PCB. IC Role / Device Role / Timing Role: Standalone discrete Schottky diode placed in series with VIN to block reverse connection damage. Use Value: 0.37 V VF minimizes voltage drop and thermal rise at 350 mA load; SOD323 footprint saves board area vs. larger packages. | Use Scenario: Freewheeling path in buck converter driving automotive LED lighting. IC Role / Device Role / Timing Role: Recirculation diode providing low-loss current path during high-side switch off-time. Use Value: 6 ns tRR prevents shoot-through risk and reduces EMI; 35 pF CT avoids destabilizing control loop compensation. |
| Body Control Module Clamping | Start-Stop System Power Rail Protection |
Use Scenario: Transient suppression on LIN bus power rail exposed to load-dump events. IC Role / Device Role / Timing Role: Clamp diode shunting induced surges to ground via guard ring-enhanced junction. Use Value: Guard ring structure withstands repetitive 100 V/10 ms transients per ISO 7637-2; low IR preserves rail stability. | Use Scenario: Reverse-current blocking in 48 V/12 V bidirectional DC/DC converter for mild-hybrid vehicles. IC Role / Device Role / Timing Role: Unidirectional isolation diode preventing backfeed from 12 V subsystem during engine cranking. Use Value: 20 V VR matches 12 V system margin; 5.0 µA IR ensures no measurable drain on standby batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB120-E3/54 (Vishay) | Higher VF (0.5 V @ 20 mA), same 20 V VR, SOD-123 package (larger footprint). | Less suitable for ultra-low-drop applications; acceptable where board space allows larger package. | Select if higher surge rating (IFS=1.0 A) is prioritized over VF and size. |
| NSR0230HT1G (onsemi) | Lower IFM (200 mA), same VF (0.37 V), identical SOD323 package and VR. | Not recommended for 350 mA continuous loads; limited to low-power sensor or interface rails. | Choose only for space-constrained designs with ≤200 mA load and matching thermal budget. |
Compared with SB120-E3/54 and NSR0230HT1G, SD103CWS-7-F uniquely balances 350 mA current handling, 0.37 V VF, 20 V VR, and SOD323 footprint-making it optimal for automotive power rails where thermal density, voltage margin, and board area are simultaneously constrained.
Availability
SD103CWS-7-F is available at Aetrix Electronics and suitable for automotive electronics, body control modules, and start-stop power systems requiring stable component supply, AEC-Q200 compliance, and long-term lifecycle support.
Supply support for SD103CWS-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, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
The SD103xWS series belongs to Diodes' automotive-qualified Schottky diode product line, engineered for robust reverse-polarity protection and fast-switching recirculation in harsh-environment vehicle subsystems.
FAQ
What is the maximum junction temperature for SD103CWS-7-F?
The SD103CWS-7-F has an operating junction temperature range of -65°C to +125°C. Its thermal resistance is 625°C/W on a standard 25 mm² copper pad; power derating begins above 25°C ambient, reaching zero dissipation at 125°C per Figure 4 in DS30101 Rev. 22-2.
Is SD103CWS-7-F qualified for automotive use?
Yes-SD103CWS-7-F meets AEC-Q200 stress test requirements for passive components and is explicitly designed for automotive applications including body control modules and start-stop systems. It is not the Q-grade variant (which is SD103CWSQ), but shares identical electrical and mechanical specs per DS30101.
How does the guard ring construction improve reliability?
The guard ring in SD103CWS-7-F surrounds the active junction to suppress edge breakdown during voltage transients, improving ESD robustness (per IEC 61000-4-2) and sustaining repetitive load-dump pulses (ISO 7637-2) without parameter shift or failure.
Can SD103CWS-7-F replace SD103AWS-7-F or SD103BWS-7-F in a design?
No-SD103CWS-7-F has lower VR (20 V) than SD103BWS-7-F (30 V) and SD103AWS-7-F (40 V). Substitution requires verifying that reverse voltage stress never exceeds 20 V; otherwise, premature breakdown or increased IR may occur. Electrical parameters like VF and tRR are consistent across the family.
SD103CWS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-F FAQ
1.How can I place an order for SD103CWS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103CWS-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 SD103CWS-7-F reliable?
The price and inventory of SD103CWS-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 SD103CWS-7-F is usually 5 days.
3.What payment methods are accepted for SD103CWS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103CWS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103CWS-7-F?
SD103CWS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103CWS-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 SD103CWS-7-F?
For technical support, including SD103CWS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103CWS-7-F requirements.
6.How does Aetrix verify that SD103CWS-7-F is sourced from the original manufacturer or authorized distributors?
All SD103CWS-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 SD103CWS-7-F meets industry standards.
7.What is the process for return or replacement of SD103CWS-7-F?
All SD103CWS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with SD103CWS-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 SD103CWS-7-F part is unused and in its original packaging.
Return procedure for SD103CWS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD103CWS-7-F Tags
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1N4448X-TP
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