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Vishay General Semiconductor - Diodes Division SD103AW-HE3-18
- Part No.:
- SD103AW-HE3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SD103AW-HE3-18.pdf
- Description:
- DIODE SCHOTTKY 40V 350MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,130
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Product details
Overview
SD103AW-HE3-18 from Vishay Semiconductors is a single AEC-Q101 qualified Schottky diode in SOD-123 package, rated for 40 V repetitive peak reverse voltage, 350 mA forward current, and 600 mV forward voltage at 200 mA. It serves as a low-loss protection or steering diode in MOS gate drive circuits and low-voltage battery systems.
For engineers reviewing the SD103AW-HE3-18 datasheet, SD103AW-HE3-18 pinout, SD103AW-HE3-18 application, or SD103AW-HE3-18 equivalent, key selection criteria include its 10 ns reverse recovery time, 50 pF junction capacitance at 0 V, AEC-Q101 qualification, SOD-123 thermal resistance of 300 K/W, and black cathode band marking for polarity identification.
Technical Context
This Schottky diode uses a metal-on-silicon barrier structure with PN junction guardring for improved ruggedness and leakage control. Its 370 mV typical forward voltage at 20 mA enables efficient biasing in low-level logic interfaces and fast-switching signal paths.
The device operates across -55 °C to +125 °C and features 2 A single-cycle surge capability. Its 5 μA maximum leakage at 30 V reverse bias supports stable performance in precision clamping and hold-up applications where dark current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage before breakdown; defines safe operating range in clamp or flyback protection. |
| IF | 350 mA continuous - Steady-state forward current limit; determines usable current headroom in power rail steering. |
| VF @ 200 mA | 600 mV - Low conduction loss enabling minimal voltage drop in battery-fed circuits and MOS gate protection paths. |
| trr | 10 ns - Fast reverse recovery supports high-frequency switching (>10 MHz) without significant tail current or ringing. |
| CD @ 0 V | 50 pF - Junction capacitance impacts AC coupling and RF signal integrity; suitable for sub-100 MHz signal path applications. |
| RthJA | 300 K/W - Thermal resistance from junction to ambient; requires PCB copper area planning for sustained 350 mA operation. |
| Tj max | 125 °C - Maximum allowable junction temperature; sets derating envelope for ambient and power dissipation combinations. |
Pinout & Package
Package: SOD-123 - Surface-mount plastic case, 2.55 mm × 1.40 mm footprint, 10.3 mg weight, black cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node (e.g., supply rail or driver output); polarity critical for correct conduction direction. |
| Cathode | Forward current exit / reverse blocking terminal | Marked with black band; ties to lower-potential node (e.g., ground or MOS source); reverse voltage applied here during blocking. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and infotainment applications requiring reliability over temperature and lifetime stress. |
| Metal-on-silicon Schottky barrier | Enables lower forward voltage than silicon PN diodes, reducing conduction loss in portable and energy-sensitive designs. |
| PN junction guardring | Suppresses edge leakage and improves voltage standoff uniformity, enhancing long-term stability in humid or biased conditions. |
| 10 ns reverse recovery | Minimizes switching losses and EMI in high-speed digital interface protection and DC-DC converter freewheeling paths. |
Applications
| Automotive Infotainment Power Rail Protection | USB Port Overvoltage Clamping |
|---|---|
Use Scenario: Protecting 5 V and 3.3 V rails in head unit MCU and audio codec sections from load dump transients and backfeed. IC Role / Device Role / Timing Role: Steering diode isolating auxiliary supplies while maintaining low forward drop during normal operation. Use Value: 40 V VRRM withstands ISO 7637-2 Pulse 1/2a; 600 mV VF avoids brownout during hot-swap events. |
Use Scenario: Preventing reverse current flow from downstream USB peripherals into host VBUS during cable insertion/removal. IC Role / Device Role / Timing Role: Unidirectional blocking diode placed in series with VBUS line prior to USB switch or LDO. Use Value: 10 ns trr ensures no data corruption during hot-plug transitions; 5 μA IR prevents standby current drain. |
| Rechargeable Li-ion Battery System Blocking | Low-Voltage Logic-Level Signal Steering |
Use Scenario: Isolating dual-cell (8.4 V max) Li-ion packs from system loads during charging to prevent parasitic discharge. IC Role / Device Role / Timing Role: Reverse-blocking diode in series with battery positive path to enforce unidirectional current flow. Use Value: 350 mA IF rating supports typical portable device charge currents; 300 K/W RthJA allows thermal management on 1 oz copper. |
Use Scenario: Routing TTL/CMOS logic signals between multiple microcontrollers sharing a common bus with level-shifting requirements. IC Role / Device Role / Timing Role: Biasing and steering diode in wired-OR configuration or level translator front-end. Use Value: 370 mV VF at 20 mA preserves logic high margin; 50 pF CD limits capacitive loading on 10 MHz clock lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SD103BW-HE3-18 | 30 V VRRM, same package and thermal specs; 5 μA IR tested at 20 V instead of 30 V | Lower reverse voltage rating restricts use to ≤30 V systems (e.g., 24 V automotive accessories) | Select when system reverse stress never exceeds 30 V and cost optimization is prioritized over margin. |
| BAT54C-HE3-18 | Dual common-cathode configuration in SOT-23; 30 V VRRM, 240 mV VF @ 10 mA, 10 pF CD | Offers dual-diode integration but lacks AEC-Q101 qualification and has lower surge rating (1.5 A IFSM) | Prefer for space-constrained dual-path designs where AEC-Q101 is not mandated and lower capacitance is critical. |
Compared with SD103BW-HE3-18 and BAT54C-HE3-18, the SD103AW-HE3-18 provides the highest reverse voltage margin (40 V) and automotive qualification, making it optimal for primary power rail protection where transient robustness and compliance are mandatory.
Availability
SD103AW-HE3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, USB power management circuits, and rechargeable battery protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SD103AW-HE3-18 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
Vishay Semiconductors is a global manufacturer of discrete semiconductors and passive components, specializing in high-reliability diodes, MOSFETs, and resistors for industrial and automotive markets.
The SD103AW-HE3-18 belongs to Vishay's SOD-123 Schottky diode family, engineered for low-loss, high-speed protection and signal routing in compact, thermally constrained environments.
FAQ
What is the maximum junction temperature for SD103AW-HE3-18?
The SD103AW-HE3-18 has a maximum junction temperature of 125 °C, as specified in the Vishay datasheet Rev. 1.7. This limit applies under steady-state conditions with proper PCB thermal design. Exceeding this temperature risks parametric shift and long-term reliability degradation. Derating curves in Figure 5 of the SD103AW-HE3-18 datasheet define safe operating voltage vs. ambient temperature combinations.
Is SD103AW-HE3-18 RoHS-compliant and halogen-free?
Yes, SD103AW-HE3-18 is RoHS-compliant per EU Directive 2011/65/EU and halogen-free per Vishay's material categorization standard (document 99912). The "HE3" suffix explicitly denotes AEC-Q101 qualification and RoHS compliance. No lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE substances exceed threshold limits.
What does the "18" packaging code mean for SD103AW-HE3-18?
The "18" in SD103AW-HE3-18 indicates 10,000 units per 13-inch reel using 8 mm tape width. This packaging format is optimized for high-volume SMT assembly. The alternative "08" code specifies 3,000 units per 7-inch reel-same tape width but smaller reel size for prototyping or low-volume builds.
How does SD103AW-HE3-18 differ from SD103AW-E3-18?
SD103AW-HE3-18 is AEC-Q101 qualified and intended for automotive applications, whereas SD103AW-E3-18 is commercial-grade only. Both share identical electrical specs and SOD-123 packaging, but the HE3 variant undergoes additional stress testing (e.g., temperature cycling, HTRB) and has controlled lot traceability required for automotive BOMs.
Can SD103AW-HE3-18 replace a 1N5817 in an existing design?
SD103AW-HE3-18 can functionally replace 1N5817 in many low-current applications due to comparable VF and IF, but caution is required: 1N5817 is DO-41 packaged (through-hole) with 1 A IF and 20 V VRRM, while SD103AW-HE3-18 is SOD-123 (SMT), 350 mA IF, and 40 V VRRM. PCB layout, thermal design, and voltage margin must be revalidated.
SD103AW-HE3-18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 50pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -55°C ~ 125°C
SD103AW-HE3-18 FAQ
1.How can I place an order for SD103AW-HE3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103AW-HE3-18 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 SD103AW-HE3-18 reliable?
The price and inventory of SD103AW-HE3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD103AW-HE3-18 is usually 5 days.
3.What payment methods are accepted for SD103AW-HE3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103AW-HE3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103AW-HE3-18?
SD103AW-HE3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103AW-HE3-18 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 SD103AW-HE3-18?
For technical support, including SD103AW-HE3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103AW-HE3-18 requirements.
6.How does Aetrix verify that SD103AW-HE3-18 is sourced from the original manufacturer or authorized distributors?
All SD103AW-HE3-18 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 SD103AW-HE3-18 meets industry standards.
7.What is the process for return or replacement of SD103AW-HE3-18?
All SD103AW-HE3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SD103AW-HE3-18, 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 SD103AW-HE3-18 part is unused and in its original packaging.
Return procedure for SD103AW-HE3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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