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1N5817-E3/54

VSH1N5817-E3/54

Vishay
Very similar Schottky diode with comparable behavior for low-drop rectification in small power circuits.
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Overview

The 1N5817-E3/54 is a Schottky barrier rectifier designed for low-voltage, high-frequency rectification in small power circuits. It features a metal-to-silicon junction that provides low forward voltage drop and fast switching characteristics. This through-hole diode is housed in a standard DO-204AL (DO-41) axial package, making it easy to integrate into traditional PCB layouts.

Why Choose This Part

This diode offers a low forward voltage drop of approximately 0.45V at 1A, which minimizes power loss compared to standard silicon rectifiers. Its fast switching speed and high surge current capability make it suitable for high-frequency applications up to 20V. The axial DO-41 package provides a familiar footprint for prototyping and simple through-hole manufacturing.

Applications

Polarity Protection
Protects low-voltage battery-operated devices from damage if the power source is connected with reverse polarity.
Freewheeling Diode
Used across inductive loads like small DC motors or relays to suppress voltage spikes during switching.
Secondary Rectification
Ideal for high-frequency rectification in low-voltage DC/DC converters and switched-mode power supplies.
OR-ing Circuits
Combines multiple power sources into a single rail while preventing backfeeding into inactive sources.

Key Specifications

Speed Fast Recovery =< 500ns, > 200mA (Io)
Technology Schottky
Mounting Type Through Hole
Package / Case DO-204AL, DO-41, Axial
Capacitance @ Vr, F 125pF @ 4V, 1MHz
Supplier Device Package DO-204AL (DO-41)
Current - Reverse Leakage @ Vr 1 mA @ 20 V
Voltage - DC Reverse (Vr) (Max) 20 V
Current - Average Rectified (Io) 1A
Operating Temperature - Junction -65degC ~ 125degC
Voltage - Forward (Vf) (Max) @ If 450 mV @ 1 A

Getting Started

When designing with this component, ensure the peak reverse voltage does not exceed 20V and the average rectified current remains under 1A. Observe the cathode band for proper orientation on your breadboard or PCB. Thermal management should consider the lead temperature to maintain the junction within the -65 to +125 degrees Celsius range.

Also Consider

1N5818-E3/54 VSHVishay - Provides a higher DC reverse voltage rating of 30V if the 20V limit of the 1N5817 is insufficient.
1N5819-E3/54 VSHVishay - Offers a 40V reverse voltage rating for applications requiring additional headroom while maintaining the same 1A current rating.
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