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Diodes Incorporated SD103BWS-7
- Part No.:
- SD103BWS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD103BWS-7.pdf
- Description:
- DIODE SCHOTTKY 30V 350MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,147
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Product details
Overview
SD103BWS-7 from Diodes Incorporated is a surface-mount Schottky barrier diode rated for 30 V peak repetitive reverse voltage, 350 mA forward current, and 0.37 V max forward voltage at 20 mA. It features negligible reverse-recovery time (6 ns), low reverse leakage (5.0 µA at 20 V), and ultra-small SOD323 package-designed specifically for automotive polarity protection and recirculating clamp circuits.
For engineers reviewing the SD103BWS-7 datasheet, SD103BWS-7 pinout, SD103BWS-7 application, or SD103BWS-7 equivalent, key selection criteria include its AEC-Q qualified reliability, 625 °C/W thermal resistance, guard ring construction for transient immunity, and compatibility with high-speed switching in space-constrained automotive ECUs and power rails.
Technical Context
This Schottky diode operates as a unidirectional low-loss rectifier with metal–semiconductor junction architecture, enabling fast switching and minimal conduction loss. Its 30 V VRWM rating and 5.0 µA IR at 20 V support robust blocking in 24 V automotive systems under transient conditions.
The device uses guard ring passivation to suppress edge breakdown and enhance ESD/EMI resilience. With 35 pF capacitance at 0 V and 6 ns tRR, it maintains signal integrity in flyback and clamping paths where capacitive loading and recovery delay must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 30 V - Maximum continuous reverse operating voltage in automotive 24 V rail applications |
| IF | 350 mA - Continuous forward current handling without derating at +25°C ambient |
| VF max | 0.37 V @ 20 mA - Low conduction loss enabling >95% efficiency in low-voltage clamp circuits |
| IR max | 5.0 µA @ 20 V - Minimal leakage ensuring stable bias in high-impedance sensing nodes |
| tRR | 6 ns - Enables operation up to ~50 MHz switching frequencies in snubber-free designs |
| CT | 35 pF @ 0 V - Low junction capacitance preserving rise/fall times in signal path clamps |
| RθJA | 625 °C/W - Thermal performance validated on 25 mm² 2 oz Cu pad, guiding PCB layout |
Pinout & Package
Package: SOD323 - ultra-compact 2-pin surface-mount plastic package (1.30 × 1.70 × 0.95 mm), cathode-banded, matte tin-plated terminals, 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 30 V reverse while leaking <5 µA |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Suppresses edge breakdown during load dump transients (ISO 7637-2 Pulse 5a), improving field reliability |
| Negligible reverse-recovery time | 6 ns tRR eliminates switching tail current, reducing EMI in DC-DC feedback loops |
| Low forward voltage drop | 0.37 V @ 20 mA minimizes power loss in always-on battery protection circuits |
| AEC-Q200 qualification | Qualified per JESD22-A108 for temperature cycling, humidity, and mechanical shock in automotive environments |
| Halogen & antimony free | Meets "Green" definition (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) for eco-compliant vehicle assembly |
Applications
| Automotive Body Control Module (BCM) | 12 V/24 V Power Rail Protection |
|---|---|
Use Scenario: Reverse-polarity protection on microcontroller power input in door module PCBs. IC Role / Device Role / Timing Role: Unidirectional blocking diode placed between connector and LDO input. Use Value: Prevents damage from accidental battery reversal while adding <0.4 V dropout and no switching delay. | Use Scenario: Flyback energy recirculation across relay coils in lighting control units. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during coil de-energization. Use Value: 6 ns tRR and 35 pF CT limit voltage overshoot to <35 V, eliminating need for RC snubbers. |
| Engine Control Unit (ECU) Sensor Interface | USB-C Port Polarity Guard |
Use Scenario: Input protection for analog sensor signal conditioning circuitry exposed to harness transients. IC Role / Device Role / Timing Role: Clamp diode shunting ISO 7637-2 pulses to ground before op-amp inputs. Use Value: Guard ring structure withstands 100 V/µs dv/dt surges without latch-up or parametric shift. | Use Scenario: Polarity enforcement on VBUS line of automotive USB-C charging ports. IC Role / Device Role / Timing Role: Series-blocking diode ensuring correct VBUS orientation regardless of cable insertion. Use Value: 350 mA IF rating supports USB PD 3.0 3 A profiles; 0.37 V VF limits voltage drop to <1.2% at 3 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB330-TB-E3/52 | Higher IF (3 A), larger DO-214AA package, VF = 0.5 V @ 3 A | Suitable for higher-current 12 V accessory rails; not space-compatible with SOD323 footprints | Select when >500 mA average current or >100 A surge handling required |
| NSR0330P2T5G | Same SOD-323 package, lower VF (0.32 V @ 20 mA), but only 20 V VRWM | Optimized for 5 V/12 V logic rails; insufficient for 24 V system transients | Select for cost-sensitive non-automotive consumer applications with ≤15 V reverse stress |
Compared with SB330-TB-E3/52 and NSR0330P2T5G, SD103BWS-7 uniquely balances 30 V blocking, SOD323 footprint, AEC-Q200 qualification, and sub-0.4 V forward drop-making it optimal for space-constrained, safety-critical 24 V automotive modules where thermal and transient margins are tightly specified.
Availability
SD103BWS-7 is available at Aetrix Electronics and suitable for automotive body control modules, 24 V power rail protection, and engine control unit sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SD103BWS-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SD103xWS series belongs to Diodes' automotive-qualified Schottky diode product line, engineered specifically for high-reliability polarity protection, flyback clamping, and reverse-current blocking in harsh-environment vehicle electronics.
FAQ
Is SD103BWS-7 qualified for automotive use?
Yes. SD103BWS-7 is AEC-Q200 qualified and manufactured to meet automotive reliability standards including temperature cycling, humidity testing, and mechanical shock. It is explicitly designated for automotive applications in Diodes' datasheet DS30101 Rev. 22–2, with separate automotive-grade part numbers (e.g., SD103BWSQ) also available.
What is the maximum junction temperature for continuous operation?
The SD103BWS-7 has an operating junction temperature range of –65°C to +125°C. At 25°C ambient and 350 mA forward current, junction temperature rise is calculated as 625 °C/W × (0.37 V × 0.35 A) ≈ 81°C, resulting in TJ ≈ 106°C - within safe margin. Derating begins above 25°C ambient per Fig. 4 in the datasheet.
Can SD103BWS-7 replace SD103AWS-7 in a 40 V design?
No. SD103BWS-7 has a 30 V VRWM rating, while SD103AWS-7 is rated for 40 V. Using SD103BWS-7 in a 40 V system risks reverse breakdown during transients or elevated temperature operation. The datasheet specifies V(BR)R = 30 V for SD103BWS, confirmed by IR = 100 µA test condition.
Does SD103BWS-7 have a defined cathode marking?
Yes. The cathode is marked by a visible band on the SOD323 package body, aligned with the cathode terminal per JEDEC standard outline. The top-view marking code "S5" or "S4 & S5" identifies SD103BWS, and the band position matches Diodes' SOD323 mechanical drawing (Dim Y = 0.450 mm from cathode edge).
SD103BWS-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):
- 30 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 @ 20 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
SD103BWS-7 FAQ
1.How can I place an order for SD103BWS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103BWS-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 SD103BWS-7 reliable?
The price and inventory of SD103BWS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD103BWS-7 is usually 5 days.
3.What payment methods are accepted for SD103BWS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103BWS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103BWS-7?
SD103BWS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103BWS-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 SD103BWS-7?
For technical support, including SD103BWS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103BWS-7 requirements.
6.How does Aetrix verify that SD103BWS-7 is sourced from the original manufacturer or authorized distributors?
All SD103BWS-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 SD103BWS-7 meets industry standards.
7.What is the process for return or replacement of SD103BWS-7?
All SD103BWS-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD103BWS-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 SD103BWS-7 part is unused and in its original packaging.
Return procedure for SD103BWS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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