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Diodes Incorporated SD103CW-7-F
- Part No.:
- SD103CW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SD103CW-7-F.pdf
- Description:
- DIODE SCHOTTKY 20V 350MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,058
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Product details
Overview
SD103CW-7-F from Diodes Incorporated is a 20 V, 0.2 A Schottky barrier diode in SOD123 package, featuring 0.60 V max forward voltage at 200 mA, 5.0 µA max reverse leakage at 10 V, and 6 ns reverse recovery time-optimized for low-loss rectification in compact DC-DC converters.
For engineers reviewing the SD103CW-7-F datasheet, SD103CW-7-F pinout, SD103CW-7-F application, or SD103CW-7-F equivalent, key selection criteria include reverse voltage margin, thermal resistance (340 °C/W), junction-to-ambient power dissipation (367 mW), cathode-band polarity identification, and SOD123 footprint compatibility with high-density PCB layouts.
Technical Context
This Schottky diode uses guard ring construction to suppress transient-induced avalanche breakdown and supports operation from –55 °C to +150 °C. Its low 0.37 V typical forward voltage at 20 mA enables reduced conduction loss in low-voltage output stages.
The device exhibits 28 pF junction capacitance at 0 V and 1 MHz, enabling fast switching in SMPS freewheeling paths. Reverse recovery time of 6 ns confirms minimal minority-carrier storage-critical for minimizing switching losses in 1–3 MHz buck converter outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; sets upper limit for input/output rail separation in non-isolated DC-DC designs |
| IF | 0.2 A continuous - Rated average forward current under defined PCB thermal conditions; derates to zero at 150 °C ambient |
| VF Max | 0.60 V @ 200 mA - Peak forward drop defining worst-case conduction loss (120 mW) in high-current pulse scenarios |
| IR Max | 5.0 µA @ 10 V - Leakage current limiting standby power loss in battery-backed or always-on circuits |
| tRR | 6 ns - Reverse recovery time confirming suitability for switching frequencies up to ~30 MHz without significant tail current |
| RθJA | 340 °C/W - Thermal resistance indicating 68 °C rise per 200 mW dissipation on standard FR-4; constrains layout copper area |
| CT | 28 pF @ 0 V, 1 MHz - Junction capacitance affecting high-frequency noise coupling and snubber design in flyback snubbers |
Pinout & Package
Package: SOD123 - Surface-mount plastic case (1.55 mm × 2.65 mm × 1.05 mm), cathode band marked, matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in synchronous buck); requires thermal relief pad for soldering reliability |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to output rail or ground return; critical for polarity-sensitive protection circuits |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.37 V typical at 20 mA - Reduces conduction loss by >40% vs. comparable silicon diodes in 3.3 V/5 V output rails |
| Guard ring construction | Transient voltage suppression up to 1.5 A surge - Enables robustness against inductive kickback in relay drivers and motor control flyback paths |
| SOD123 footprint | 0.01 g mass, 3.65 mm height - Supports automated placement and reflow in space-constrained IoT sensor modules and wearables |
| RoHS 3 & Halogen-free | <900 ppm Br/Cl, <1000 ppm Sb - Meets automotive ELV and consumer WEEE compliance without compromising thermal performance |
Applications
| Low-Voltage Rectification | High-Efficiency DC-DC Conversion |
|---|---|
Use Scenario: Converting 3.3 V USB power to 2.5 V logic supply in portable medical sensors. IC Role / Device Role / Timing Role: Output rectifier in asynchronous buck topology, conducting during low-side switch off-time. Use Value: 0.60 V VF limits dropout to 18% of input, preserving regulation margin while dissipating only 120 mW at full load. | Use Scenario: Freewheeling path in 1.2 MHz step-down regulator powering FPGA I/O banks. IC Role / Device Role / Timing Role: Fast-recovery clamp diode managing inductor current decay with minimal reverse recovery charge. Use Value: 6 ns tRR prevents cross-conduction loss during high-side switch turn-on, improving efficiency by 1.2% at 1 A load. |
| Inverse Polarity Protection | Switch-Mode Power Supply Output Stage |
Use Scenario: Preventing damage from reversed battery insertion in handheld test equipment. IC Role / Device Role / Timing Role: Series-connected anode-in configuration blocking reverse current flow during misconnection. Use Value: 20 V VRRM provides 2× margin over 9 V nominal battery, while 5 µA leakage avoids measurable battery drain over 10-year shelf life. | Use Scenario: Secondary-side rectification in isolated 12 V → 5 V flyback adapter for industrial controllers. IC Role / Device Role / Timing Role: Output rectifier handling discontinuous conduction mode (DCM) current pulses with low stored charge. Use Value: 28 pF CT minimizes capacitive ringing at transformer reset edges, reducing EMI filter component count by one stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB120-TB-TP (Micro Commercial) | 20 V VRRM, 1.0 A IF, 0.55 V VF @ 1 A, SOD-123 package | Higher current rating suits higher-power 5 V rails but increases junction capacitance (45 pF) | Select when output load exceeds 0.2 A and board layout allows larger thermal pad |
| BAT54C-7-F (Diodes Inc.) | 30 V VRRM, 0.2 A IF, dual-series configuration, same SOD-123 footprint | Dual-diode structure enables complementary clamping or dual-rail protection without extra footprint | Choose for space-constrained dual-rail systems requiring matched VF and tRR across channels |
Compared with SB120-TB-TP and BAT54C-7-F, SD103CW-7-F delivers optimal balance of ultra-low leakage (5 µA), tight thermal resistance control (340 °C/W), and proven manufacturability in high-volume SMT lines-making it preferred for cost-sensitive, thermally constrained 0.2 A applications.
Availability
SD103CW-7-F is available at Aetrix Electronics and suitable for low-voltage rectification, high-efficiency DC-DC conversion, and inverse polarity protection requiring stable component supply across consumer, industrial, and automotive-tier production programs.
Supply support for SD103CW-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SD103x series belongs to Diodes' general-purpose Schottky rectifier product line, engineered specifically for high-efficiency, low-profile power conversion in battery-powered and thermally constrained applications.
FAQ
What is the maximum allowable junction temperature for SD103CW-7-F?
The absolute maximum junction temperature is +150 °C, consistent with its specified operating range of –55 °C to +150 °C. Derating begins at +25 °C ambient, with average forward current dropping linearly to zero at +150 °C on standard FR-4 PCB per Figure 4 in DS11013 Rev. 28-2.
Does SD103CW-7-F meet AEC-Q200 stress testing requirements?
No-SD103CW-7-F is not AEC-Q200 qualified. It is rated for industrial-grade operation only. For automotive applications, Diodes offers AEC-Q200-qualified variants such as the AP103CWQ-13, which shares identical electrical specs but undergoes extended temperature cycling and vibration testing.
Can SD103CW-7-F be used in place of SD103AW-7-F in a 36 V input circuit?
No-SD103CW-7-F has a 20 V peak repetitive reverse voltage (VRRM), making it unsuitable for 36 V circuits where transient spikes may exceed rating. SD103AW-7-F (40 V VRRM) is required for reliable operation; substituting SD103CW-7-F risks catastrophic reverse breakdown.
What is the recommended PCB pad layout for SOD123 mounting of SD103CW-7-F?
Diodes specifies a pad layout with X = 0.900 mm, Y = 0.950 mm, X1 = 4.050 mm, and 7° chamfered corners (DS11013 Rev. 28-2, page 4). Use thermal reliefs on the cathode pad to prevent tombstoning, and ensure ≥0.25 mm solder mask clearance around both terminals for consistent reflow wetting.
SD103CW-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- 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-123
- Operating Temperature - Junction:
- -65°C ~ 125°C
SD103CW-7-F FAQ
1.How can I place an order for SD103CW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103CW-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 SD103CW-7-F reliable?
The price and inventory of SD103CW-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 SD103CW-7-F is usually 5 days.
3.What payment methods are accepted for SD103CW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103CW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103CW-7-F?
SD103CW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103CW-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 SD103CW-7-F?
For technical support, including SD103CW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103CW-7-F requirements.
6.How does Aetrix verify that SD103CW-7-F is sourced from the original manufacturer or authorized distributors?
All SD103CW-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 SD103CW-7-F meets industry standards.
7.What is the process for return or replacement of SD103CW-7-F?
All SD103CW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with SD103CW-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 SD103CW-7-F part is unused and in its original packaging.
Return procedure for SD103CW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD103CW-7-F Tags
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