HER303 Diode

Specifications of HER303 diode

  • Maximum Recurrent Peak Reverse Voltage: 200 V
  • Maximum Average Forward Output Current: 3 A
  • Maximum Forward Voltage Drop per element at 1.0A DC: 1 V
  • Maximum reverse recovery time: 50 ns
  • Typical Junction Capacitance: 70 pF
  • Package: DO-27
  • Weight: 0.4 grams
  • Operating and Storage Temperature Range: -65...+150 °C

Polarity and Pinout

The HER303 diode has a cathode (-) and anode (+). In the schematic symbol, the tip of the triangle with the line on top of it is the cathode. The cathode is marked on the body of a diode by a band as shown below.
HER303 diode polarity
The current can flow from only the anode to the cathode and never from the cathode to the anode - the HER303 diode is like a one way electric valve.

Dimensions of HER303 diode

Dimensions HER303 diode

Replacement and Equivalent

You can replace the HER303 with the HER503, SF34, SF35, SF36, SF38, SF54, SF55, SF56, SF58, UF5402, UF5404