The 1N5822 is a high-current Schottky Barrier Diode specifically designed for low-voltage, high-frequency rectification. It offers a significant upgrade over the 1N5819, increasing the current capacity to 3.0A. The most critical advantage of the 1N5822 is its exceptionally low forward voltage drop, which minimizes power loss and heat generation. This makes it an ideal choice for high-efficiency switching power supplies, battery chargers, and solar power applications where every millivolt of saved energy translates into longer battery life and improved system performance.
1N5822 Pinout (DO-201AD)
The 1N5822 is housed in a larger DO-201AD package to handle higher current and better heat dissipation.
| Pin | Terminal | Description |
| 1 | Cathode | The negative terminal (marked with a band) |
| 2 | Anode | The positive terminal |
Technical Specifications – maximum
- Peak Repetitive Reverse Voltage (VRRM): 40V
- Average Forward Rectified Current (IO): 3.0A
- Forward Voltage Drop (VF): 0.525V (at 3A)
- Peak Forward Surge Current (IFSM): 80A
- Reverse Current (IR): 2.0mA
- Operating Junction Temperature: -65°C to +125°C
Key Features & Benefits
- Extremely Low Voltage Drop: Higher efficiency and lower heat output than standard silicon diodes.
- 3-Amp Rating: Ideal for medium-power DC-DC converters and battery management.
- Fast Switching Speeds: Negligible reverse recovery time, perfect for high-speed switching.
- High Surge Capacity: Capable of handling 80A peak surges during circuit startup.
Common Applications
- Switching Power Supplies: High-efficiency rectification in buck/boost converters.
- Solar Battery Charging: Preventing reverse current flow from battery to solar panel.
- Freewheeling Diode: Managing inductive spikes in motor and relay drivers.
- Battery Isolation: Separating multiple power sources with minimal voltage loss.
1N5822 Equivalent & Substitutes
- 1N5820 / 1N5821
- MBR340
- SS34
- SB340
Related Tutorials on ElxHub
- Basics: Diodes – Basics, Types, and Working
- Solar Projects: How to Use Diodes in Solar Charging Circuits
- Selection Guide: Ultimate Diode Selection Guide
Conclusion
The 1N5822 is a champion of efficiency in the 3-Amp power class. By drastically reducing the voltage drop across the diode, it allows engineers to build cooler, smaller, and more efficient power systems. For solar chargers and modern switching regulators, the 1N5822 remains one of the most cost-effective ways to boost overall circuit performance.
Download the Diode Datasheet pdf:
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