1N5400 Diode Pinout and Specifications

1N5400 Diode Pinout and Specifications

Are you looking to master the 1N5400 diode pinout and specifications? If so, then you’ve come to the right place. In this blog post, we’ll go over everything you need to know about the popular 1N5400 diode. You’ll learn what it is, its various properties and characteristics, its pinout configuration, and more. By the end of this blog post, you should be well-equipped with reliable knowledge regarding how to use a 1N5400 diode in your electronic project!

1N5400 Diode Description

The 1N5400 diode is a three-terminal device that acts as a low voltage, high current rectifier.

This device has excellent avalanche characteristics and can be used in applications such as power supplies, DC/DC converters, motor controllers, etc. The rated maximum repetitive forward voltage (Vf) of the device is 3 V with a reverse breakdown voltage (VR) of 50 V. Its peak surge current rating is 10 A and it can safely withstand temperature up to 150 °C without any deterioration in performance. Boasting a lightning-fast recovery time of less than 4 μs for pulse durations under 500 ns, this diode ensures reliable operation even at high frequencies.

The 1N5400 diode is a cost-effective solution for many switching applications due to its low forward voltage drop and high power dissipation. Not only is this product RoHS compliant, but it also comes in multiple packages like DO-41, SOD-323 and the impressive SMAJ series. This makes it suitable for use in a variety of systems where space is limited. With the right implementation, this diode can provide excellent performance with minimal energy loss. [1]

1N5400 Diode Description

1N5400 Pinout and Specifications

The 1N5400 diode has two terminals at the cathode end and one terminal at the anode end. The terminals are labeled as Cathode (C), Anode (A) and Ground (G). The pinout of this device is illustrated below:
| C | A | G |
| — | — | — |
| Cathode | Anode | Ground |

The 1N5400 diode also has a few key specifications that should be kept in mind when designing any system around it. These include its maximum repetitive forward voltage, reverse breakdown voltage, peak surge current rating, temperature range and recovery time. Its rated Vf is 3 V with a VR rating of 50 V. It can handle up to 10 A of peak surge current and can safely operate at temperatures up to 150 °C. The device also has a fast recovery time from under 4 μs for pulse durations less than 500 ns.

1N5400 Features

The 1N5400 diode is a popular choice for many DC/DC converters, motor controllers and other applications due to its low forward voltage drop, high current handling ability and fast recovery time. It also has avalanche characteristics that make it suitable for use in switching applications.

Furthermore, the device is RoHS compliant and available in various packages such as DO-41, SOD-323 and SMAJ series making it an excellent option for space-constrained systems. With the right implementation, this diode can provide reliable performance with minimal energy loss even at higher frequencies.

1N5400 Replacement and Equivalent

The 1N5400 diode has a number of equivalent replacements and alternatives. Some of these include the BZX84C3V0-7B, 1N5402, and ECF100A diode types. All of these have similar pinouts as the 1N5400 but may have slight variations in their forward voltage drop or maximum current rating.

1N5400 Replacement and Equivalent

It is important to check the datasheets of each replacement part before making a substitution to ensure that it meets all requirements for your application.

When choosing an alternative for the 1N5400 diode, be sure to compare its various specifications such as peak reverse voltage (VRRM), average rectified current (IF(AV)), maximum surge current (I(SUR)), and forward voltage drop (VF). It is important to ensure that the replacement part can handle the current requirements of your application, as well as any reverse voltage spikes.

Additionally, some considerations should be made for how much power is dissipated by the diode in normal operation. If you are unsure about which replacement part to choose, it may be best to consult with a professional for advice.

Whenever replacing an electrical component, safety should always be a top priority. Make sure all necessary precautions have been taken before performing any repairs or replacements on electrical equipment. [2]

Where to Use 1N5400 Diode

The 1N5400 diode can be used for a variety of purposes, including general purpose rectification and reverse protection. It is often used as a replacement for germanium diodes in circuit applications where higher temperature operation is required, or when faster switching speeds are desired. It can also be used in voltage limiting applications like zener diode circuits as well as snubber circuits where high surge capability is needed.

In addition to these uses, the 1N5400 diode may also be employed in power supply regulation and free-wheeling applications. It’s versatile enough to work in almost any basic application that requires a standard silicon signal diode.

Furthermore, its low forward voltage drop makes it suitable for most switch applications.

How to Safely Long Run in a Circuit

Long running in a circuit with a 1N5400 diode is relatively simple and safe. First, make sure that the voltage rating of the diode matches the voltage used in your circuit. Second, ensure that the power rating of the diode matches or exceeds the power requirements for your circuit components. Finally, make sure that you have taken any necessary precautions to prevent accidental overloads or short circuits.

To avoid potential damage from overheating, use an appropriate heat sink or other cooling mechanism during long runs involving high currents. Also make sure that you check for proper insulation to reduce risk of electric shock when working with higher voltages. Additionally, double-check connections to ensure no unexpected sources are applied to any part of the circuit.

How to Safely Long Run in a Circuit

These safety considerations should always be kept in mind when using a 1N5400 diode for long runs and other applications. Following these steps can help you to safely achieve the results you need without compromising performance or reliability. With proper precautions, the 1N5400 Diode is an excellent choice for providing reliable power management in circuits of all kinds. [3]

1N5400 Applications

The 1N5400 diode is a versatile component that can be used in several applications. It has a wide range of uses in circuits including power supplies, controlling the flow of current, and protection against reverse voltages or overcurrents.

1N5400 Applications

In power supplies, it is often used as an input rectifier to regulate DC voltage levels. This allows power supplies to operate at lower voltages while minimizing energy loss when converting AC voltage into DC voltage. It also allows signals sent through a circuit to remain consistent regardless of fluctuations in the input voltage supply.

It can be used as part of a flyback diode circuit to protect against short-circuits caused by electrostatic discharge (ESD). By connecting two diodes in series with the flyback diode, it creates a current path to prevent damage from ESD and other high voltage surges.

The 1N5400 can also be used as a part of an overcurrent protection circuit to limit the amount of current flowing through the circuit at any given time. This is especially useful in circuits that may draw more current than they can handle without damaging components or causing malfunctions.

Finally, 1N5400 diodes can be used as part of radio frequency (RF) circuits to protect against interference from external signals. By connecting two diodes in parallel with the RF circuit, it allows for strong isolation between the input and output, reducing crosstalk and keeping signal quality high. [4]

Benefits and Cons of Using 1N5400 Diode

The 1N5400 is a diode with a variety of applications, from power rectification to voltage regulation. It offers several benefits over other diodes because of its small size and high efficiency.


  • High voltage breakdown ratings – This means that higher voltages can be handled without causing damage to the diode.
  • Low forward voltage drop – This allows more current to pass through the device without significant losses in electrical energy.
  • Fast switching times – The response time for this diode is fast enough for most applications including those requiring transient protection or noise filtering.
  • Low power dissipation – Power dissipation is reduced due to the low forward voltage drop, which helps to reduce the overall power requirements.


  • Low current capacity – The diode is limited in its current handling capabilities, meaning that it is not suitable for use in applications requiring high currents.
  • Poor temperature stability – This diode can be affected by changes in ambient temperature, causing a change in its performance characteristics. Additionally, higher temperatures can lead to reduced efficiency and increased power losses.
  • High reverse leakage current – This means that more current will pass through the device when the reverse polarity is applied than with other diodes, resulting in power losses and degraded performance.

Overall, the 1N5400 diode offers many benefits including a high breakdown voltage rating, fast switching times, low power dissipation and a small footprint. However, its limitations in terms of current capacity, temperature stability and reverse leakage current should be taken into consideration when selecting the best diode for an application. [5]


What is the voltage of 1N5400 diode?

The voltage of a 1N5400 diode is approximately 3.0V. It has a reverse breakdown voltage of 50V and forward voltage drop of 0.7V when conducting current. Additionally, it can handle up to 1A of continuous forward current and 3A peak surge current.

What is the pinout for a 1N5400 diode?

The pinout for a 1N5400 diode consists of two pins: an Anode pin (positive) and Cathode pin (negative). The Anode is typically marked with a stripe or dot on the body of the diode, while the Cathode will be left unmarked in most cases. When connecting the diode, make sure the Anode pin is connected to the positive voltage source and the Cathode pin is connected to ground or other negative voltage source.

What are the typical applications for 1N5400 diode?

The 1N5400 diode can be used in a variety of applications, including power supplies, LED circuits, switching applications, and protection against reverse voltages. It can also be used as a signal diode or clamping diode in many electronics projects. Furthermore, 1N5400 diodes are often used as flyback diodes in high-voltage rectifier assemblies.

Useful Video: Diodes (LED, IR, Photo and Laser diode) Basic Electronics


The 1N5400 is a versatile and reliable diode with a variety of applications. Its rugged construction makes it suitable for use in hostile environments and its low current handling capability makes it perfect for signal protection circuits. Its pinout is easy to understand, and it can be used as a replacement for other diodes with similar specifications. With all these features, the 1N5400 diode is an excellent choice for both novice and experienced users alike.


  1. http://www.el-component.com/diodes/1n5400
  2. https://www.futurlec.com/Diodes/1N5400pr.shtml
  3. http://www.datasheetcafe.com/1n5400-datasheet-pdf/
  4. https://datasheetspdf.com/pdf/1259952/WON-TOP/1N5400/1
  5. https://www.mouser.com/datasheet/2/115/ds28007-41625.pdf