Diodes Incorporated SD103CW-13-F

Overview

SD103CW-13-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-designed for low-loss rectification in compact DC-DC converters and polarity protection circuits.

For engineers reviewing the SD103CW-13-F datasheet, SD103CW-13-F pinout, SD103CW-13-F application, or SD103CW-13-F equivalent, key selection criteria include its 20 V reverse rating, SOD123 thermal resistance (340 °C/W), cathode-band polarity marking, and suitability for space-constrained 5–12 V power rails requiring fast switching and low conduction loss.

Technical Context

This Schottky diode uses a planar guard ring structure to suppress edge breakdown and improve transient robustness. Its low barrier height enables sub-0.6 V forward drop at rated current while maintaining stable 5.0 µA leakage at VR = 10 V.

The device operates across –55 °C to +150 °C with 367 mW power dissipation on FR-4 board. Its 28 pF junction capacitance at 0 V and 6 ns tRR support high-frequency switching up to ~50 MHz in flyback and buck converter freewheeling paths.

Key Specifications

Pinout & Package

Package: SOD123 - Surface-mount plastic case (1.55 mm × 2.65 mm × 1.05 mm), cathode marked by band, matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1.

Key Features

Applications

Availability

SD103CW-13-F is available at Aetrix Electronics and suitable for low-voltage rectification, DC-DC converter freewheeling, and inverse polarity protection requiring stable component supply and consistent SOD123 form factor.

Supply support for SD103CW-13-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 for cost-sensitive, space-constrained applications demanding low VF, fast recovery, and reliable operation from –55 °C to +150 °C.

FAQ

What is the maximum junction temperature for SD103CW-13-F?

The device has an operating junction temperature range of –55 °C to +150 °C. At 0.2 A DC current and 25 °C ambient on a standard FR-4 board, junction temperature rise is approximately 68 °C (340 °C/W × 0.2 A² × 0.6 Ω), well within safe limits. Derating begins above 75 °C ambient per Figure 4.

Is SD103CW-13-F suitable for automotive applications?

SD103CW-13-F is not AEC-Q101 qualified. While it meets industrial temperature and reliability requirements, Diodes specifies that automotive-grade variants require explicit PPAP documentation and IATF 16949 manufacturing-contact Diodes directly for AEC-compliant equivalents like the B120AF-13-F.

How does SD103CW-13-F differ from SD103AW-13-F?

SD103CW-13-F has a 20 V V_RRM and 5.0 µA I_R @ 10 V, while SD103AW-13-F offers 40 V V_RRM and 5.0 µA I_R @ 30 V. Both share identical VF (0.60 V), package (SOD123), and tRR (6 ns), but CW is optimized for ≤12 V systems where lower leakage at reduced voltage improves efficiency.

Can SD103CW-13-F replace a 1N5817 in existing designs?

Yes-SD103CW-13-F matches the 1N5817's 20 V V_RRM, 0.2 A I_F, and DO-213AA (SOD-123) footprint. Its 0.60 V V_F is comparable, and 6 ns tRR is significantly faster than the 1N5817's ~30 ns, improving high-frequency performance without layout changes.