1N5819 Schottky Diode Characteristics, Parameters, Package, Application Fields

07 May 2024 178

Ⅰ. Introduction to 1N5819

Ⅱ. Characteristics of 1N5819 diode

Ⅲ. 1N5819 diode parameters

Ⅳ. Package of 1N5819 diode

Ⅴ. Judgment of the quality of 1N5819 diode

Ⅵ. How to use 1N5819 diode?

Ⅶ. Application fields of 1N5819 diode

Ⅰ. Introduction to 1N5819


1N5819 is a rectifier diode with low voltage drop, high efficiency and high response speed. It is suitable for automotive electronics, solar panels, portable devices and other power conversion systems that require compact design. Its maximum forward voltage can reach 40V, its maximum continuous current is 1A, and it has a fast reverse recovery time, with a typical value of 50 nanoseconds. Additionally, it has a peak current capability of 25A and an operating temperature range of -65°C to 125°C. Therefore, 1N5819 diodes have been widely used in many fields such as automobiles, communications and power management.

Alternatives and equivalents:



• SR003


Ⅱ. Characteristics of 1N5819 diode

1. Reliability: 1N5819 has excellent reliability and stability. It can work stably for a long time and is suitable for various application environments and working conditions.

2. Small size: 1N5819 generally has a smaller volume and size, making it suitable for compact electronic equipment and circuit board designs.

3. Low voltage drop: The forward voltage drop of 1N5819 is relatively low, making it more efficient in low voltage applications. It can reduce energy loss and provide more stable circuit operation under low voltage conditions.

4. Fast recovery time: 1N5819 is a high-speed switching diode with fast recovery time. This means it can quickly transition from on to off, providing higher switching efficiency and better performance.

Ⅲ. 1N5819 diode parameters

The following parameters can help us understand the performance and use of 1N5819 diode. The meaning and function of each parameter will be introduced in detail below:

1. Forward voltage drop (VF): The forward voltage drop of 1N5819 is 0.46V when the forward current is 1A, which means that when the diode is forward-conducting, the voltage drop across it is 0.46V. Therefore, in a practical application, when the 1N5819 is on, it will produce a voltage drop of 0.46V.

2. Reverse recovery time (trr): The reverse recovery time of 1N5819 is 150 ns, which means that after the diode switches from the forward conducting state to the reverse off state, it takes 150ns to fully Restore its reverse blocking capabilities. This parameter is particularly critical in high-speed switching applications because it directly affects the response speed and efficiency of the system.

3. Maximum reverse voltage (VR): The maximum reverse voltage rating of the 1N5819 is 40V, which means that when operating in reverse, the maximum voltage that this diode can withstand must not exceed 40V. In circuit design, if reverse protection function is required, we can choose this diode with appropriate reverse voltage rating.

4. Maximum forward current (IF): The maximum forward current of 1N5819 is 1A, which means that the current cannot exceed 1A when working in the forward direction. In the application, we can select the appropriate diode according to the required current.

5. Forward resistance (Rf): Forward resistance refers to the internal resistance of the 1N5819 diode in the conductive state under normal operating conditions. For the 1N5819 diode, the forward resistance is 0.25Ω. This parameter can help us calculate the power loss and heat generated inside the diode under specific conditions.

Ⅳ. Package of 1N5819 diode


Ⅴ. Judgment of the quality of 1N5819 diode

Judging the quality of 1N5819 diode usually requires the following steps:

1. Observe the appearance: When inspecting the 1N5819 diode, we should first observe whether its appearance is complete and ensure that there is no obvious damage or cracks. If you notice obvious problems with the appearance, this is a sign that the diode may be damaged.

2. Temperature test: After connecting the 1N5819 diode to the appropriate circuit, we should closely observe whether it will overheat under normal operating conditions. If a diode heats up abnormally, this may indicate an underlying problem or malfunction.

3. Reverse breakdown test: Connect the 1N5819 diode to a suitable circuit and gradually increase the reverse voltage. If a diode begins to breakdown before it reaches its rated reverse voltage (40V), this may indicate an underlying problem or failure.

4. Using a multipurpose tester: Use a multimeter to measure the forward voltage drop and reverse leakage current of the 1N5819 diode. In forward-biased conditions, appropriate current should be able to flow through the diode, and the voltage drop at this time should not be too high. Under reverse bias conditions, the multimeter should detect no or almost no reverse leakage current.

To sum up, by observing whether the appearance of the 1N5819 diode is complete, conducting temperature tests and reverse breakdown tests, and using a multimeter (multipurpose tester) to measure its forward voltage drop and reverse leakage current, we can relatively accurately determine the quality of the 1N5819 diode.

Ⅵ. How to use 1N5819 diode?

First, we need to clarify the specific application of 1N5819 in the circuit. It can be used in various scenarios such as reverse polarity protection in power supply circuits, noise immunity filters in switching power supplies and inverter circuits, and battery charge and discharge protection. According to the specific application requirements, we need to choose the appropriate circuit connection method. When using 1N5819, we must pay attention to its key parameters such as maximum forward current, maximum reverse voltage, and forward voltage drop. In practical applications, it must be ensured that the limits of these parameters are not exceeded to prevent damage to the diode. Next, we should select the appropriate 1N5819 package type based on the specific application environment and space constraints. Make sure the package type selected meets the requirements of the circuit while providing appropriate thermal performance and mechanical strength. Then, connect the 1N5819 into the circuit with the correct polarity and make sure the soldering quality is good. During the welding process, care must be taken to avoid overheating and excessive welding time to prevent damage to the diode. Finally, be sure to follow safe operating procedures when using the 1N5819. Avoid working under conditions exceeding its rated voltage and current to prevent short circuit, fire and other dangerous situations.

Ⅶ. Application fields of 1N5819 diode

Finally, we will introduce in detail the specific uses of 1N5819 diodes in different application fields. The first is emergency stop protection. In some circuits, emergency situations may cause the current to increase rapidly. To protect the safety of circuits and equipment, we need a protection device that can quickly cut off the current. The 1N5819 diode is ideal for this protection mechanism due to its fast recovery characteristics. The second is reverse protection. In many circuits, it is necessary to protect the circuit from reverse voltage or reverse current. At this time, the 1N5819 diode can be used as a reverse protection device. Its fast recovery capability can quickly cut off reverse voltage or current to ensure that the circuit is not damaged. Finally there is the DC-DC converter. In DC-DC converters, 1N5819 diodes are used as rectifiers. Its fast recovery speed ensures lower switching losses, thereby increasing the efficiency of the DC-DC converter. In addition, the low forward voltage drop of the 1N5819 diode helps reduce the power consumption of the entire DC-DC converter.

Frequently Asked Questions

1. What is the voltage drop of a 1N5819 diode?

The 1N5819 is a Schottky Diode with forward voltage drop of 600mV and a forward current of 1A.

2. What is 1N5819 diode?

The 1N5819 is a Schottky diode with a low forward voltage drop and high switching speed. It is commonly used in high frequency applications like Inverters, DC-DC converters etc.

3. Can I use 1N4007 instead of 1N5819?

You could use one of those 1N4007, but ideally you would want a diode with a lower forward voltage drop like a Schottky diode, type 1N5819, to keep down voltage losses (drop).

4. Is 1N5819 a Schottky diode?

The 1N5819 from STMicroelectronics is an axial led low drop power schottky rectifier in DO-41 package. These diodes are featured with very small conduction losses, negligible switching losses, extremely fast switching and low forward voltage drop.

5. What are the differences between the 1N4148 vs 1N5819? 

The reverse leakage of 1N5819 tube is relatively large, but it has the characteristics of small capacitance and high speed. But it is not as fast as 1N4148.