DST2045AX Rectifier: Features, Pinout, and Datasheet
Schottky Diode Rectifier Fast Recovery =< 500ns, > 200mA (Io) 580mV @ 20A -55°C~155°C 1.2mA @ 45V 2-Termination Tape & Reel (TR) P600, Axial Through Hole









Schottky Diode Rectifier Fast Recovery =< 500ns, > 200mA (Io) 580mV @ 20A -55°C~155°C 1.2mA @ 45V 2-Termination Tape & Reel (TR) P600, Axial Through Hole
DST2045AX is a 20A, 45V Axial Single Schottky Barrier Rectifier. This article mainly introduces features, pinout, datasheet and other detailed information about Littelfuse Inc. DST2045AX.

Schottky Diode Explained
DST2045AX Description
Littelfuse's DST2045AX Ultra Low VF Schottky Barrier Rectifier is developed to suit the needs of commercial and industrial applications by providing high temperature, low leakage, and low VF devices.
It's ideal for high-frequency switching mode power supplies, as well as free-wheeling and polarity protection diodes.
DST2045AX Pinout
The following figure is DST2045AX Pinout.

Pinout
DST2045AX CAD Model
The following figures are DST2045AX Symbol, Footprint and 3D Model.

Symbol

Footprint

3D Model
DST2045AX Features
• Ultra low forward voltage drop
• High-frequency operation
• High junction temperature capability
• Guard ring for enhanced ruggedness and long term reliability
• Single die in P600 package
Specifications
- TypeParameter
- Factory Lead Time23 Weeks
- Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Through Hole - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Through Hole - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
P600, Axial - Diode Element Material
The parameter "Diode Element Material" refers to the specific semiconductor material used in the construction of a diode. This material determines the electrical characteristics and performance of the diode, including its forward voltage drop, reverse breakdown voltage, and switching speed. Common diode element materials include silicon, germanium, and gallium arsenide, each offering different advantages for various applications. The choice of material impacts the diode's efficiency, thermal stability, and overall suitability for specific electronic circuits.
SILICON - Number of Elements1
- Operating Temperature (Max.)150°C
- Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tape & Reel (TR) - Published2016
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations2
- ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - Applications
The parameter "Applications" in electronic components refers to the specific uses or functions for which a component is designed. It encompasses various fields such as consumer electronics, industrial automation, telecommunications, automotive, and medical devices. Understanding the applications helps in selecting the right components for a particular design based on performance, reliability, and compatibility requirements. This parameter also guides manufacturers in targeting their products to relevant markets and customer needs.
GENERAL PURPOSE - Additional Feature
Any Feature, including a modified Existing Feature, that is not an Existing Feature.
FREE WHEELING DIODE - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
WIRE - Peak Reflow Temperature (Cel)
Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.
NOT SPECIFIED - Reach Compliance Code
Reach Compliance Code refers to a designation indicating that electronic components meet the requirements set by the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation in the European Union. It signifies that the manufacturer has assessed and managed the chemical substances within the components to ensure safety and environmental protection. This code is vital for compliance with regulations aimed at minimizing risks associated with hazardous substances in electronic products.
unknown - Time@Peak Reflow Temperature-Max (s)
Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.
NOT SPECIFIED - JESD-30 Code
JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.
O-PALF-W2 - Configuration
The parameter "Configuration" in electronic components refers to the specific arrangement or setup of the components within a circuit or system. It encompasses how individual elements are interconnected and their physical layout. Configuration can affect the functionality, performance, and efficiency of the electronic system, and may influence factors such as signal flow, impedance, and power distribution. Understanding the configuration is essential for design, troubleshooting, and optimizing electronic devices.
SINGLE - Speed
In electronic components, "Speed" typically refers to the rate at which data can be processed or transferred within the component. It is a measure of how quickly the component can perform its functions, such as executing instructions or transmitting signals. Speed is often specified in terms of frequency, such as clock speed in processors or data transfer rate in memory modules. Higher speed components can perform tasks more quickly, leading to improved overall performance in electronic devices. It is an important parameter to consider when designing or selecting electronic components for specific applications.
Fast Recovery =< 500ns, > 200mA (Io) - Diode Type
In electronic components, the parameter "Diode Type" refers to the specific type or configuration of a diode, which is a semiconductor device that allows current to flow in one direction only. There are various types of diodes, each designed for specific applications and functions. Common diode types include rectifier diodes, zener diodes, light-emitting diodes (LEDs), and Schottky diodes, among others. The diode type determines the diode's characteristics, such as forward voltage drop, reverse breakdown voltage, and maximum current rating, making it crucial for selecting the right diode for a particular circuit or application. Understanding the diode type is essential for ensuring proper functionality and performance in electronic circuits.
Schottky - Current - Reverse Leakage @ Vr
Current - Reverse Leakage @ Vr is a parameter that describes the amount of current that flows in the reverse direction through a diode or other semiconductor component when a reverse voltage (Vr) is applied across it. This leakage current is typically very small, but it is important to consider in electronic circuits as it can affect the overall performance and reliability of the component. The reverse leakage current is influenced by factors such as the material properties of the semiconductor, temperature, and the magnitude of the reverse voltage applied. Manufacturers provide this parameter in datasheets to help engineers and designers understand the behavior of the component in reverse bias conditions.
1.2mA @ 45V - Voltage - Forward (Vf) (Max) @ If
The parameter "Voltage - Forward (Vf) (Max) @ If" refers to the maximum voltage drop across a diode when it is forward-biased and conducting a specified forward current (If). It indicates the maximum potential difference the diode can withstand while allowing current to flow in the forward direction without breaking down. This value is crucial for designing circuits as it helps determine how much voltage will be lost across the diode during operation. Higher Vf values can lead to reduced efficiency in power applications, making this parameter essential for optimizing circuit performance.
580mV @ 20A - Case Connection
Case Connection refers to the method by which an electronic component's case or housing is connected to the electrical circuit. This connection is important for grounding purposes, mechanical stability, and heat dissipation. The case connection can vary depending on the type of component and its intended application. It is crucial to ensure a secure and reliable case connection to maintain the overall performance and safety of the electronic device.
ISOLATED - Forward Current
Current which flows upon application of forward voltage.
20A - Operating Temperature - Junction
Operating Temperature - Junction refers to the maximum temperature at which the junction of an electronic component can safely operate without causing damage or performance degradation. This parameter is crucial for determining the reliability and longevity of the component, as excessive heat can lead to thermal stress and failure. Manufacturers specify the operating temperature range to ensure that the component functions within safe limits under normal operating conditions. It is important for designers and engineers to consider the operating temperature - junction when selecting and using electronic components to prevent overheating and ensure optimal performance.
-55°C~155°C - Max Reverse Voltage (DC)
Max Reverse Voltage (DC) refers to the maximum voltage that a semiconductor device, such as a diode, can withstand in the reverse bias direction without failing. Exceeding this voltage can lead to breakdown and potential damage to the component. It is a critical parameter in circuit design to ensure reliability and prevent failure when the device is subjected to reverse voltage conditions.
45V - Average Rectified Current
Mainly used to characterize alternating voltage and current. It can be computed by averaging the absolute value of a waveform over one full period of the waveform.
20A - Number of Phases1
- Reverse Current-Max
Reverse Current-Max is a parameter used to specify the maximum amount of current that can flow in the reverse direction through an electronic component, such as a diode or a transistor. This parameter is important because it indicates the maximum reverse current that the component can handle without being damaged. It is typically measured in amperes (A) and is crucial for ensuring the reliability and longevity of the component in a circuit. Designers need to consider this parameter when selecting components to prevent reverse current from exceeding the specified limit and causing potential failure.
1200μA - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
DST2045AX Part Numbering and Marking System
The following figure shows DST2045AX Part Numbering and Marking System.

Part Numbering and Marking System
DST2045AX Applications
• Switching Mode Power Supply
• DC/DC Converters
• Free-Wheeling Diodes
• Polarity Protection Diodes
DST2045AX Package
The following figure is DST2045AX Package.

Package
DST2045AX Manufacturer
Littelfuse products are used in a wide range of electrical energy-related applications, from consumer gadgets to cars and industrial buildings. With rising platforms in power regulation and sense, they have the industry's broadest and deepest array of circuit protection devices. As part of their corporate strategy of accelerated organic expansion and strategic acquisitions, they are growing into complimentary markets. Power semiconductors, heavy-duty switches, magnetic, optical, electromechanical, and temperature sensors, as well as equipment for the safe regulation and distribution of electrical power, are among these markets.
Trend Analysis
Datasheet PDF
- Datasheets :
- Environmental Information :
What is a Schottky barrier rectifier?
The Schottky diode or Schottky Barrier Rectifier is named after the German physicist “Walter H. Schottky”, which is a semiconductor diode designed with metal by the semiconductor junction. It has a low-forward voltage drop and a very rapid switching act. Actually, it is one of the oldest semiconductor devices in reality.
What is the use of Schottky barrier diode?
Schottky diodes are used for their low turn-on voltage, fast recovery time and low-loss energy at higher frequencies. These characteristics make Schottky diodes capable of rectifying a current by facilitating a quick transition from conducting to blocking state.
How does a Schottky rectifier work?
A typical diode combines p-type and n-type semiconductors to form a p-n junction. In a Schottky diode, metal replaces the p-type semiconductor. When metal is combined with an n-type semiconductor an m-s junction is formed.
Can Schottky diodes be used in rectifiers?
Schottky diodes are also used as rectifiers in switched-mode power supplies. The low forward voltage and fast recovery time lead to increased efficiency. They can also be used in power supply "OR"ing circuits in products that have both an internal battery and a mains adapter input, or similar.
What is the difference between a rectifier diode and a Schottky diode?
Schottky diode, also known as barrier diode is mainly used in low voltage circuits because the forward voltage drop of Schottky diode(Vf) is less than a rectifier diode. The forward voltage drop of a Schottky diode is typically in the range of 25 to 0.5 V whereas the Vf of a rectifier diode is around 0.7 volts.
What is the name of the DST2045AX Ultra Low VF Schottky Barrier Rectifier?
Littelfuse.
What is Littelfuses DST2045AX Ultra Low VF Schottky Barrier Rectifier ideal for?
High-frequency switching mode power supplies.
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