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Diodes Incorporated SD103AWS-7
- Part No.:
- SD103AWS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD103AWS-7.pdf
- Description:
- DIODE SCHOTTKY 40V 350MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,675
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Product details
Overview
SD103AWS-7 from Diodes Incorporated is a surface-mount Schottky barrier diode rated for 40 V peak repetitive reverse voltage, 350 mA forward current, and 0.37 V max forward voltage at 20 mA, with 5.0 µA max reverse leakage at 30 V - designed specifically for automotive polarity protection and flyback recirculation in space-constrained DC/DC converter inputs.
For engineers reviewing the SD103AWS-7 datasheet, SD103AWS-7 pinout, SD103AWS-7 application, or SD103AWS-7 equivalent, key selection criteria include low VF for efficiency-critical 12 V automotive rails, negligible tRR (<6 ns) for high-frequency switching integrity, SOD323 footprint compatibility, and AEC-Q qualification traceability via the SD103AWSQ variant.
Technical Context
This Schottky diode employs guard ring construction to suppress transient-induced junction breakdown and achieves ultra-low reverse recovery time by eliminating minority carrier storage - enabling use in 1–5 MHz buck converter freewheeling paths without switching loss penalties. Its 35 pF capacitance at 0 V supports fast edge handling in ESD-clamped signal lines.
The device operates across –65 °C to +125 °C with 625 °C/W junction-to-ambient thermal resistance on standard 25 mm² copper pads, and its 200 mW power dissipation limit defines maximum continuous IF under ambient derating per Figure 4 of DS30101 Rev. 22-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Withstands 40 V repetitive reverse bias without avalanche conduction in 12 V automotive systems with load-dump transients. |
| IFM | 350 mA - Supports continuous output current in low-power auxiliary rails (e.g., infotainment USB charging circuits). |
| VF MAX | 0.37 V @ 20 mA - Reduces forward conduction loss to <7.4 mW at nominal bias, critical for thermally constrained PCB layouts. |
| IR MAX | 5.0 µA @ 30 V - Ensures minimal standby leakage in always-on vehicle modules (e.g., CAN wake-up receivers). |
| tRR | <6 ns - Eliminates reverse recovery tail, preventing shoot-through in synchronous rectifier gate-drive timing windows. |
| CT | 35 pF @ 0 V - Limits capacitive loading on high-speed control signals (e.g., PWM feedback nodes) without degrading loop stability. |
Pinout & Package
Package: SOD323 - ultra-small plastic surface-mount package (1.30 × 1.70 × 0.90 mm), matte tin-plated terminals, cathode band marking, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground return or switch-node source) in polarity protection configurations. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; tied to input rail in reverse-voltage protection; carries full load current during freewheeling. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Suppresses localized electric field crowding during ISO 7637-2 pulse 5a transients, extending surge survivability beyond 1.5 A IFSM rating. |
| Negligible reverse-recovery time | tRR <6 ns enables clean turn-off in 2–3 MHz DC/DC controllers without requiring snubbers or dead-time adjustment. |
| Low reverse capacitance | 35 pF at 0 V allows integration into 10–50 MHz clock line clamping networks without signal integrity degradation. |
| AEC-Q qualified variant available | SD103AWSQ meets AEC-Q101 stress test requirements for automotive under-hood applications, including temperature cycling and HTRB. |
Applications
| Automotive Polarity Protection | DC/DC Converter Freewheeling |
|---|---|
Use Scenario: Reverse battery connection safeguard in 12 V vehicle accessory ports (e.g., OBD-II, USB-C PD modules). IC Role / Device Role: Series blocking diode placed between battery input and downstream PMIC/regulator. Use Value: 0.37 V VF minimizes voltage drop at 350 mA, preserving >97% input headroom for LDOs operating near dropout. |
Use Scenario: Freewheel path in 2 MHz buck converter powering ADAS camera sensor bias rails. IC Role / Device Role: Low-loss synchronous rectifier replacement in non-isolated step-down topology. Use Value: Sub-6 ns tRR prevents cross-conduction with high-side MOSFET, maintaining >92% efficiency at 300 mA load. |
| ESD-Suppressed Signal Clamping | Low-Power Standby Rail Isolation |
Use Scenario: Bidirectional ESD clamp on LIN bus transceiver I/O pins exposed to vehicle harness. IC Role / Device Role: Back-to-back Schottky pair (with companion diode) limiting voltage excursions to ±0.7 V. Use Value: 35 pF CT avoids resonance with 100 Ω LIN termination, preserving 19.2 kbps signal rise/fall times. |
Use Scenario: Isolation diode between always-on microcontroller RTC supply and main system rail. IC Role / Device Role: Leakage-suppressing barrier preventing backfeed from backup coin cell into discharged main battery. Use Value: 5.0 µA IR at 30 V ensures <1 µA total standby drain, extending 12-month coin cell life in telematics modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54AWT1G | VF = 0.32 V @ 100 mA (lower), but VRRM = 30 V and IR = 10 µA @ 25 V (higher leakage). | Preferred in 5 V logic-rail clamping where lower VF matters more than 40 V margin. | Select when optimizing for ultra-low VF in ≤30 V systems and accepting higher IR in always-on monitoring nodes. |
| BAT54CW-7-F | VRRM = 30 V, VF = 0.33 V @ 100 mA, CT = 40 pF - slightly higher capacitance, same SOD323 package. | Suitable for cost-sensitive consumer DC/DC where AEC-Q is not required. | Choose for non-automotive designs needing identical footprint and tighter VF tolerance, but without automotive qualification needs. |
Compared with SD103AWS-7, SBAT54AWT1G trades 10 V reverse margin for lower conduction loss in 5–24 V rails, while BAT54CW-7-F matches mechanical fit and cost but lacks AEC-Q validation and has elevated leakage - making SD103AWS-7 the sole choice for production automotive modules requiring guaranteed 40 V transient immunity.
Availability
SD103AWS-7 is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and portable medical devices requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SD103AWS-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-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.
The SD103AWS-7 belongs to Diodes' automotive-qualified Schottky diode product line, engineered for robustness in harsh environments - emphasizing low VF, fast switching, and AEC-Q-compliant reliability in compact SOD323 packaging.
FAQ
What is the maximum junction temperature for SD103AWS-7 during continuous operation?
The SD103AWS-7 has an absolute maximum junction temperature of +125 °C. Under continuous 350 mA forward current, junction temperature rise is governed by RθJA = 625 °C/W and ambient conditions - for example, at TA = 85 °C and PD = 122.5 mW (0.35 A × 0.35 V), TJ ≈ 163 °C, exceeding rating; thus derating to ≤200 mA is required above 70 °C ambient per Figure 4.
Does SD103AWS-7 meet AEC-Q101 requirements?
No - SD103AWS-7 is not AEC-Q101 qualified. The automotive-compliant version is SD103AWSQ, which undergoes full AEC-Q101 stress testing including HTGB, TCT, and HTRB. SD103AWS-7 shares identical electrical specs and SOD323 packaging but lacks the qualification documentation and lot-level traceability required for automotive production.
Can SD103AWS-7 replace SD103CWS in a 20 V circuit?
Yes - SD103AWS-7 has VRRM = 40 V versus SD103CWS's 20 V, so it safely substitutes in 20 V applications. However, VF is specified at 0.37 V (20 mA) for SD103AWS-7 versus 0.60 V for SD103CWS at 200 mA, meaning conduction loss will be lower at light loads but may differ at higher currents due to differing test conditions.
What is the cathode band orientation on the SOD323 package?
The cathode band on SD103AWS-7 is located at the end of the SOD323 body opposite the anode - visible as a distinct dark stripe aligned with the shorter dimension of the package. Per Diodes' marking diagram, the band corresponds to Pin 2 (cathode) in standard SOD323 pinout, with Pin 1 (anode) at the unmarked end.
SD103AWS-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):
- 40 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 @ 30 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
SD103AWS-7 FAQ
1.How can I place an order for SD103AWS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103AWS-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 SD103AWS-7 reliable?
The price and inventory of SD103AWS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD103AWS-7 is usually 5 days.
3.What payment methods are accepted for SD103AWS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103AWS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103AWS-7?
SD103AWS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103AWS-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 SD103AWS-7?
For technical support, including SD103AWS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103AWS-7 requirements.
6.How does Aetrix verify that SD103AWS-7 is sourced from the original manufacturer or authorized distributors?
All SD103AWS-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 SD103AWS-7 meets industry standards.
7.What is the process for return or replacement of SD103AWS-7?
All SD103AWS-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD103AWS-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 SD103AWS-7 part is unused and in its original packaging.
Return procedure for SD103AWS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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