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SD103 Small Signal Schottky Diode

[Click the image to enlarge it]

SD103 is a surface mount Schottky Diode with a Low voltage drop of 370mA, high efficiency and fast switching rate. It is commonly used in low voltage, high frequency inverters, freewheeling, efficient full wave bridges in telephone subsets and polarity protection applications.


Pin Configuration

Pin No.

Pin Name




Current always Enters through Anode



Current always Exits through Cathode



  • SMC Schottky Barrier rectifier
  • Forward Current (IF): 350mA
  • Maximum Forward Voltage (VF): 0.370V (@20mA)
  • Reverse Current (IR): 5µA
  • Maximum DC Blocking Voltage: 40V
  • SMD Marking: S6
  • Available in SOD-123 and DO-35 Package


Note: Complete Technical Details can be found at the SD103 datasheet given at the end of this page.


Alternative for SD103: NTE585, SS310, SS54


Other Schottky Diodes: bat85, 1N4148, 1N4733A


Brief Note on SD103

The cathode terminal of this diode can be identified by using the colour band. Compared to normal diodes Schottky diode has relatively faster switching speed and hence can be used in high frequency switching circuits. It also has low forward drop voltage, the voltage drop across the SD103 diode 370mA.

SD103 Schottky Diode Characteristic Graph


As shown in the graph the Diode has a minimum voltage drop of approx. 0.1V across it when 0.01A is flowing through it, as the current increases the Voltage drop across the diode also increase. The maximum current through the diode is 350mA and the maximum reverse voltage is 40V. The complete details of the diode can be found at the datasheet below.


Applications of Diode

  • Can be used to prevent reverse polarity problem
  • High Frequency Inverters
  • Used as a protection device
  • Current flow regulators
  • Polarity Protection applications


2D representation (SOD—123W)

This diode is available in SOD-123W package. The dimensions for the package is shown below

SD103 Schottky Diode 2D-Model

Component Datasheet

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