What is 1N5819? – 1A, 40V, Diode, Schottky Barrier Rectifier

What is 1N5819?

This is a Schottky diode that is commonly used in electronic circuits. It has a low forward voltage drop and a fast switching speed, making it useful for applications such as voltage regulation, rectification, and power supply protection. The diode is rated for a maximum voltage of 40V and a maximum current of 1A.

Function : 40V, 1.0 Ampere Schottky Barrier Rectifier, Diode

Package: DO-41 type

Manufacturer: Fairchild Semiconductor



Advantages Vs Disadvantages


1. Low forward voltage drop reduces power dissipation and improves efficiency in voltage regulation and rectification circuits.
2. Fast switching speed makes it useful in applications that require rapid switching, such as power supply protection circuits.
3. High surge current capability allows the diode to handle short-term overloads without damage.
4. Low reverse leakage current minimizes power losses and improves circuit performance.


1. Low maximum rated voltage and current limit the diode’s usefulness in high-power applications.
2. The low forward voltage drop can cause the diode to conduct even with low forward bias voltages, which can be a problem in some circuits.
3. The high switching speed can cause ringing and other unwanted effects in some circuits, which may require additional circuit design measures to mitigate.


This is Schottky Barrier Rectifier.

1. 1.0 ampere operation at TA = 90°C with no thermal runaway.
2. For use in low voltage, high frequency inverters free wheeling, and polarity protection applications.

Absolute Maximum Ratings and Characteristics


Absolute Maximum Ratings (Ta = 25°C)

1. Maximum Repetitive Reverse Voltage: Vrrm = 40V

2. Average Rectified Forward Current: IF(AV) = 1A

3. Power Dissipation : 1.25 W

5. Operating Junction: Tj = -65 to +150 °C

6. Storage temperature: Tstg = -65 to +150 °C


1N5819 Datasheet

1N5819 pdf



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