1N5825

series introduction

# Introduction to the 1N5825 Product Series

## 1. Overview
The 1N5825 product series belongs to the category of Schottky barrier diodes. These diodes are widely recognized in the electronics industry for their unique characteristics and diverse applications. Schottky diodes, in general, are known for their fast switching speeds and low forward voltage drop, and the 1N5825 series is no exception.

## 2. Key Specifications

### Electrical Characteristics
- **Forward Voltage Drop**: One of the most significant features of the 1N5825 series is its low forward voltage drop. Typically, at a forward current of 3A, the forward voltage drop is around 0.55V. This low voltage drop results in less power dissipation across the diode, making it highly efficient in power - conversion applications. For example, in a DC - DC converter, a lower forward voltage drop means less energy is wasted as heat, leading to improved overall system efficiency.
- **Reverse Voltage Rating**: The 1N5825 series has a reverse voltage rating of 20V. This rating indicates the maximum reverse - bias voltage that the diode can withstand without breaking down. It is crucial in applications where the diode may be exposed to reverse voltages, such as in rectifier circuits.
- **Forward Current Rating**: These diodes are designed to handle a continuous forward current of up to 3A. This high - current - handling capability makes them suitable for power - supply applications where large amounts of current need to be rectified or switched.

### Thermal Characteristics
- **Thermal Resistance**: The thermal resistance of the 1N5825 series is an important parameter that affects its performance in high - power applications. A lower thermal resistance allows the diode to dissipate heat more effectively. For instance, a typical thermal resistance from junction to ambient (RθJA) might be around 62.5°C/W. This means that for every watt of power dissipated in the diode, the junction temperature will increase by 62.5°C above the ambient temperature.

## 3. Package and Physical Characteristics
- **Package Type**: The 1N5825 series is commonly available in a DO - 201AD package. This package is a through - hole type, which is well - suited for printed circuit boards (PCBs) and provides good mechanical stability. The DO - 201AD package has a standard pin configuration, making it easy to integrate into existing circuit designs.
- **Dimensions**: The package dimensions are standardized, with a length of approximately 9.5mm, a width of about 5.5mm, and a height of around 3.5mm. These dimensions are important for PCB layout design, as they determine the space required for the diode on the board.

## 4. Applications

### Power Supplies
- **DC - DC Converters**: In DC - DC converters, the 1N5825 series can be used as a rectifier diode. Its low forward voltage drop reduces power losses, which is especially important in high - efficiency converters. For example, in a step - down DC - DC converter, the diode is used to convert the high - frequency AC output of the switching stage back to DC. The fast switching speed of the Schottky diode ensures that the converter can operate at high frequencies, leading to smaller and more efficient power supplies.
- **Linear Power Supplies**: In linear power supplies, the 1N5825 can be used as a protection diode. It can prevent reverse current flow in case of a power - supply malfunction, protecting the sensitive components in the circuit.

### Battery - Powered Devices
- **Battery Charging Circuits**: The low forward voltage drop of the

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