1N5819 is a diode model that belongs to the Schottky Diode type. It has two pins and is usually used in high frequency applications such as inverters, DC-DC converters, etc.

1N5819 is a Schottky diode in DO-41 package. It is a diode of the 1N581x series. There are other diodes in this series, namely the 1N5817 and 1N5818. All diodes in this series have a maximum output current of 1A. Maximum repetitive voltage is 40V, non-repetitive peak forward current is 25A. The maximum power dissipation of the diode is 1.25 watts. It features low voltage drop, fast switching, and low reverse leakage current.

Schottky diodes are designed for use in high-frequency circuits, power supplies, battery-powered and energy-saving applications, while rectifier diodes are designed for rectifying AC current and converting it into DC current, high-voltage blocking and driving high-voltage loads, etc.

Ⅰ.1N5819 specifications

•Number of pins:2
•Capacitance:110 pF
•Length:5.2 mm
•Number of pins:2
•Polarity:Standard
•Rated current:1.00 A
•Output current:≤1.00 A
•Rated voltage (DC):40.0 V
•Installation style:Through Hole
•Forward current:1 A
•Forward current (Max):1 A
•Forward voltage (Max):900 mV
•Operating temperature (Max):+125℃
•Operating temperature (Min):-60 ℃
•Thermal resistance:45℃/W (RθJC)
•Forward voltage:600mV @1A
•Maximum forward surge current (Ifsm):25 A
•Product Category:Schottky Diodes and Rectifiers

 

Ⅱ.Features of 1N5819

1.Basic characteristics: 1N5819 is a diode with fast recovery characteristics. It is made of silicon material and has a high operating temperature range and current handling capability. The 1N5819 has a rated reverse voltage of 40V and a rated forward current of 1A. This makes it suitable for low power applications and rectification tasks in switching power supplies.

2.Reliability: As a common standard component, 1N5819 has been widely verified to perform reliably in various applications and has a long service life.

3.Package diversity: 1N5819 can be used in different package types, such as DO-41, SMA and SMB, to adapt to different application requirements.

4.High temperature performance: 1N5819 can usually work stably in a higher temperature range, which makes it suitable for applications under various environmental conditions.

5.Low reverse withstand voltage: The reverse withstand voltage of 1N5819 is usually less than 60V, so it is suitable for low-voltage (not higher than 12V) switching power supplies. It should be noted that the reverse withstand voltage value cannot be exceeded during use, otherwise the diode may be damaged.

6.Low forward voltage drop: 1N5819 has a low forward voltage drop in the forward conduction state. This means that under normal operating conditions, it provides lower power losses and voltage drops. This is important for applications that require efficient energy conversion and reduced system heat.

7.Stability and reliability: 1N5819 has good thermal characteristics and temperature tolerance. It can work stably at higher operating temperatures and has smaller thermal resistance and thermal capacity. This makes 1N5819 more reliable and anti-interference, suitable for various harsh environmental conditions.

8.Fast recovery characteristics: 1N5819 has fast recovery time (Trr). This means that when the diode switches from the forward conducting state to the reverse blocking state, it can quickly return to the conducting state, reducing energy loss during the switching process. This characteristic makes the 1N5819 ideally suited for high-frequency switching circuits and applications requiring fast response.

Ⅲ.Working principle of 1N5819

•1N5819 is a Schottky diode whose working principle is based on the characteristics of Schottky junction. Schottky diodes are composed of a metal and semiconductor structure. Compared with ordinary PN junction diodes, their structures are slightly different.

•When a forward voltage is applied to the forward terminal of 1N5819, electrons enter the N-type semiconductor from the hole region of the P-type semiconductor, and holes enter the P-type semiconductor from the electron region of the N-type semiconductor, forming a current flow. Unlike ordinary PN junction diodes, in Schottky diodes, electrons are transported through the metal/semiconductor contact (Schottky contact), which has a low potential barrier and therefore a low forward voltage drop (VF), thus Reduced power consumption and heat generation.

•The Schottky structure allows only a small part of carriers (electrons, holes) at both ends of 1N5819 to pass through the potential barrier, thereby reducing the reverse leakage of the device. Therefore, 1N5819 has good reverse polarity blocking performance and can be used in power supply protection and other occasions.

Ⅳ.Maximum Ratings of 1N5819

 

Ⅴ.Thermal Response of 1N5819

 

Ⅵ.The difference between 1N5819 and IN4007

1.Forward voltage drop:
•The 1N5819 has a low forward voltage drop (typically between 0.45V and 0.6V), which makes it highly efficient at low voltages.
•The forward voltage drop of 1N4007 is usually high, generally about 0.7V.

2.Type:
•1N5819 is a Schottky diode
•1N4007 is a silicon rectifier diode

3.Reverse leakage current:
•Due to the characteristics of Schottky diodes, 1N5819 has lower reverse leakage current under reverse voltage.
•The reverse leakage current of 1N4007 is relatively high, especially at higher reverse voltages.

4.Application fields:
•1N5819 is often used in circuits with high frequency and fast response requirements, such as switching power supplies, DC-DC converters and inverters.
•1N4007 is usually used in low frequency and higher power rectifier circuits, such as power adapters and bridge rectifier circuits.

 

Ⅶ.Application fields of 1N5819

1.DC-DC converter: 1N5819 can be used as a diode in a DC-DC converter to help achieve efficient conversion of electrical energy. In DC-DC converters, 1N5819 diodes can be used as switching diodes to participate in the efficient conversion process of electrical energy. A DC-DC converter is an electronic device capable of converting one DC voltage to another DC voltage, usually used to increase or decrease the power supply voltage to meet the needs of different devices or systems.

2.Switching power supply: Due to its fast switching characteristics and low voltage drop, 1N5819 is suitable for use in rectification and reverse protection circuits in switching power supplies. Switching power supply is an efficient power conversion technology that chops the input voltage into high-frequency pulses, then uses a transformer to perform voltage conversion, and then rectifies and filters to obtain the required output voltage. In this process, the fast switching characteristics of the 1N5819 diode make it very suitable for use in the rectification circuit of a switching power supply.

3.Inverter: In the inverter circuit, 1N5819 can be used to rectify the output and convert alternating current into direct current. The main function of an inverter is to convert direct current (DC) into alternating current (AC) in order to power loads that require AC power. At the output of the inverter, there is usually a rectifier circuit that converts the AC power generated by the inverter into DC power for use by the load or further processing.

4.Charger: 1N5819 can be used in the rectification part of the charger circuit to convert alternating current into direct current to charge batteries or electronic devices. The main function of the charger is to convert AC power (such as household power) into DC power suitable for battery charging. In this process, the rectifier circuit plays a key role, responsible for converting alternating current into direct current. In the charger circuit, the 1N5819 diode can be used as a rectifier diode. When alternating current passes through the charger, the 1N5819 diode switches according to the polarity of the alternating current. During the positive half cycle, the diode is on, allowing current to pass; during the negative half cycle, the diode is off, preventing current from passing through. In this way, the alternating current can be converted into pulsating direct current through the unidirectional conductivity of the diode.

5.Power adapter: In the power adapter, 1N5819 can be used in a bridge rectifier circuit to convert alternating current into direct current to supply the power required by electronic devices. The main task of the power adapter is to convert unstable AC power that is not suitable for direct use in electronic devices into DC power that is stable and suitable for use by the device. The bridge rectifier circuit is a key part of the power adapter. It consists of four diodes, two of which conduct electricity forward and the other two diodes conduct electricity in reverse, thereby ensuring that current flows during each half cycle of the alternating current. load.

6.Power supply protection: As a fast-response diode, 1N5819 can be used in power supply protection circuits to prevent reverse voltage and overcurrent from damaging circuits and equipment. In power protection circuits, 1N5819 diodes can be used to build a reverse voltage protection circuit. That is, when reverse voltage occurs in the circuit, the diode will quickly conduct and guide the reverse voltage to the ground, thereby protecting the circuit. Other components are protected from damage. The 1N5819 is primarily designed as a fast-response rectifier diode, and its overcurrent protection capability is relatively limited. For applications requiring higher overcurrent protection capabilities, it may be necessary to select specialized overcurrent protection devices such as transient voltage suppressors (TVS) or fast-blow fuses.

7.Communication equipment: In communication equipment, 1N5819 diodes are used in power supply and signal processing circuits to stabilize and protect voltage. Its high-speed switching characteristics make it an ideal component for signal shaping and processing. In power circuits, 1N5819 diodes can be used for voltage stabilization and protection. Communication equipment has high requirements on power supply stability, because unstable power supply may cause signal distortion or equipment failure. The fast response and stable voltage characteristics of the 1N5819 diode can help stabilize the power supply voltage and provide protection in the event of overvoltage or overcurrent, thereby ensuring the normal operation of communication equipment.

8.Consumer electronics: In the field of consumer electronics, 1N5819 diodes are often used in switching power supplies of electronic equipment. Its fast recovery time and low forward voltage drop make it ideal for efficient power conversion. In the field of consumer electronics, 1N5819 diodes are indeed widely used in switching power supplies of electronic equipment, mainly due to their fast recovery time and low forward voltage drop characteristics. The 1N5819 diode responds quickly to changes in the power supply due to its fast recovery time, which helps reduce energy loss and improve power supply efficiency.

9.Power management: 1N5819 can be used as a reverse protection diode for the power supply to prevent reverse voltage from causing damage to the power circuit. It can also be used for rectification and voltage adjustment of power circuits to ensure the stability and efficiency of the power supply. For voltage regulation, the 1N5819 diode can work with other components to maintain stability in the power supply output voltage. It can play the role of voltage dividing or current limiting in the circuit to ensure that the power circuit can provide stable output voltage under various working conditions.

 

Ⅷ.Correctly install and remove 1N5819 diode

•Install

1.Confirm polarity: 1N5819 diodes are polarized and usually have a marking identifying their positive terminal. Make sure to correctly identify and confirm their polarity to avoid installation errors.

2.Preparatory work: Before installation, ensure that the target circuit is powered off and take necessary anti-static measures to avoid damage to electronic components.

3.Choose the correct package type: According to the circuit requirements and actual conditions, choose the appropriate 1N5819 package type, such as DO-41, SMA or SMB, etc.

4.Install onto the circuit board: Insert the pins of the 1N5819 diode into the corresponding holes on the circuit board, making sure the pins are correctly aligned and making sure they are in good contact with the circuit board.

5.Soldering: Use appropriate soldering tools and methods to solder the pins of the 1N5819 diode to the circuit board firmly. Be careful to avoid overheating to prevent damage to the diodes.

6.Testing: After the installation is completed, perform necessary tests and inspections to ensure that the 1N5819 is installed correctly and connected to the circuit normally.

•Disassembly

1.Power off: Before disassembling the 1N5819 diode, be sure to disconnect the power supply and ensure that the circuit is in a safe state.

2.Prepare tools: Prepare appropriate soldering tools, such as a soldering sucker or soldering shovel, to safely remove the 1N5819 diode soldered to the circuit board.

3.Heating the pins: Use a soldering station or soldering iron to heat the pins of the 1N5819 diode to be removed to soften the solder.

4.Remove the solder: Use a solder wick to suck up the heat-softened solder, or use a soldering shovel to carefully remove the solder from the pins and circuit board.

5.Handle with Care: Handle the 1N5819 diode with care during disassembly, making sure not to damage its pins or case.

6.Inspection: After disassembly is complete, check the status of the circuit board and 1N5819 diode to ensure there is no damage or other problems.

7.Safe Handling: Handle disassembled 1N5819 diodes safely to avoid bending or damaging the pins for possible future reuse.

Frequently Asked Questions

1.What is the typical forward voltage drop of 1N5819?
The typical forward voltage drop of 1N5819 is between 0.45V and 0.6V.

2.How to correctly use 1N5819 diode in a circuit?
First, determine the working mode of the diode, select the appropriate circuit location, then determine the polarity of the diode, then control the current and voltage, and finally consider the heat dissipation issue.

3.What are the advantages or disadvantages of the 1N5819 diode compared to other types of diodes (such as silicon rectifier diodes)?
Advantages:1N5819 diode has the advantages of fast recovery time, low forward voltage drop, small reverse leakage, etc.
Disadvantages:limited current capacity, low withstand voltage