What Is the 1N5817? 1A 20V Schottky Diode and Uses
The 1N5817 is a Schottky diode rated 1 A and 20 V reverse voltage. With a low forward drop (~0.45 V) it is used in SMPS, reverse-polarity protection and low-voltage rectification. In the same family the 1N5818=30V, 1N5819=40V. Its reverse leakage is higher than an ordinary diode; if the circuit voltage is near 20V, the 1N5819 is safer.
The 1N5817 is a Schottky diode rated 1 A and 20 V reverse voltage. With a low forward voltage drop (~0.45 V) and fast switching it is preferred in low-voltage power and switching circuits. For the concept, see what is a Schottky diode.
What is the 1N5817 used for?
Switching power supplies (SMPS), reverse-polarity protection, low-voltage rectification and OR-ing. It is in the same family as the 1N5819; the difference is reverse voltage (5817=20V, 5818=30V, 5819=40V). Its low forward drop gives high efficiency.
Specifications
| Parameter | Value |
|---|---|
| Type | Schottky rectifier |
| Current (IF) | 1 A |
| Reverse voltage (VR) | 20 V |
| Vf | ~0.45 V (low) |
Watch out
Schottky diodes have higher reverse leakage current than ordinary diodes, and it rises with temperature. The 20 V reverse limit is low; if the circuit voltage is close to it, the 1N5819 (40V) is safer. Schottkys are not suitable for high-voltage AC rectification.
Equivalents
- 1N5819: 40V, same family (higher voltage).
- SS14: an SMD 1A 40V Schottky.
- 1N5822: a 3A Schottky (higher current).
Find it in our catalog
Use the 1N5817 search.