Table of Contents
1N5822 Schottky Diode: Specs, Applications & Circuit Guide
Introduction
In the pursuit of power efficiency, the 1N5822 Schottky Diode has become a well-known component in the electronic component market. Unlike standard silicon diodes that rely on a P-N junction, the 1N5822 uses a metal-semiconductor junction. This key difference gives it a lower forward voltage drop, about 0.525 V compared with 0.7 V to 1.1 V for standard silicon diodes, as well as ultra-fast switching speed. These advantages make it a reliable choice for high-efficiency DC-DC conversion and battery protection.
1.Technical Specifications
For B2B buyers and engineers, the 1N5822 offers a robust balance of current capacity and low thermal stress.
| Specification | Value |
|---|---|
| Maximum Repetitive Reverse Voltage VRRM | 40 V |
| Maximum Average Forward Current IF(AV) | |
| Forward Voltage Drop VF at 3 A | Approx. 0.525 V |
| Peak Surge Current IFSM | 80 A, 8.3 ms half sine wave |
| Reverse Leakage Current | 1 mA max at 40 V |
| Operating Temperature | -65°C to +125°C |
| Package | DO-201AD Axial Lead |
2.Working Principle: The Schottky Barrier
Schottky barrier concept. By replacing the p-type semiconductor with metal, the diode eliminates the charge storage effects found in standard PN junctions.
Low Barrier Potential: Results in less energy wasted as heat during conduction.
Zero Reverse Recovery Time
3.Professional Applications in 2025/2026
The 1N5822 is widely used as an output rectifier in DC-DC converters. Its low $V_F$ directly translates to higher system efficiency, particularly in low-voltage rails (3.3V, 5V) where a 0.7V drop would be a massive percentage of total power.
2. Solar Power Systems
In solar panels, the 1N5822 acts as a Blocking Diode. It prevents the battery from discharging back into the solar panel during the night or low-light conditions. Its high 3A rating is sufficient for small to mid-range solar chargers.
3. Reverse Polarity Protection
For industrial controllers and IoT gateways, the 1N5822 protects delicate circuitry from accidental battery reversal. Its low voltage drop ensures that the system still receives adequate voltage even with the diode in series.
4. Flyback Diode for Inductive Loads
4.1N5822 vs. Other Schottky Diodes
| Feature | 1N5822 | 1N5819 | MBR340 |
|---|---|---|---|
| Max Current | 3A | 1A | |
| Max Voltage | 40V | 40V | 40V |
| Package | DO-201AD (Axial) | DO-41 (Axial) | TO-220 (Power) |
| B2B Strategy | Best for 3A Axial | Best for 1A Low-Cost | Best for Heatsink Mount |
5.Testing the 1N5822
Diode Mode:
Forward Bias: Red probe on Anode, Black on Cathode. Expect 0.2V to 0.5V (Schottky diodes read lower than silicon).
Reverse Bias: Black on Anode, Red on Cathode. Should read “OL” (Open Loop).
Fault Check
6.Sourcing and Lifecycle Tips
: Active. The 1N5822 is a mature, stable component with a very low risk of obsolescence.
Manufacturers: Top-tier sources include STMicroelectronics, ON Semiconductor (onsemi), Vishay, and Diodes Inc.
BOM Optimization: For surface-mount (SMD) designs, the SS34
7.Conclusion
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Alice lee
Business Manager
Focused on the electronic components sector, the author shares industry knowledge, product insights, and sourcing perspectives related to modern electronics manufacturing. With close attention to market trends, component applications, and supply chain developments, the content is designed to support engineers, buyers, and businesses in making more informed decisions.