SF51 Diode

• Maximum Recurrent Peak Reverse Voltage: 50 V
• Maximum Average Forward Output Current: 5 A
• Maximum Forward Voltage Drop per element at 1.0A DC: 0.95 V
• Maximum reverse recovery time: 35 ns
• Typical Junction Capacitance: 50 pF
• Package: DO-27
• Weight: 1.18 grams
• Operating and Storage Temperature Range: -65...+150 °C

The SF51 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.The current can flow from only the anode to the cathode and never from the cathode to the anode - the SF51 diode is like a one way electric valve.You can replace the SF51 with the SF52, SF53, SF54, SF55, SF56, SF58