1N5408 1000V 3A Rectifier Diode - General Purpose Plastic Rectifier Diode

1000V 3A Rectifier Diode for General Purpose Electronics

This 1000V 3A rectifier diode is a dependable through-hole diode for converting AC to DC, blocking reverse voltage, and handling general rectification tasks in electronic circuits. It is commonly used in power supplies, adapters, converters, inverters, and other circuits where current needs to flow in only one direction.

The 1N5408 is part of the Vishay General Semiconductor 1N5400 series and is rated for up to 1000V repetitive peak reverse voltage with a 3A average forward rectified current rating. It is a good choice when you need a higher-current rectifier diode than smaller signal or 1A rectifier diodes can provide.

1N5408 Rectifier Diode for Power Supplies and DC Circuits

The 1N5408 diode is often used in general purpose rectification for power supplies, battery chargers, DC input protection, freewheeling diode circuits, converters, and hobby electronics projects. Its 1000V reverse voltage rating gives it extra voltage headroom for many AC and DC designs.

Because it is a single rectifier diode, it can be used by itself for reverse polarity protection or paired with other diodes to build rectifier circuits, depending on the application. The color band on the body marks the cathode end, making polarity easier to identify during installation.

High Surge Current Rating for Reliable Rectification

This diode is designed with high forward surge capability, making it suitable for circuits that may see brief startup or inrush current conditions. The 1N5408 is rated for a 200A peak forward surge current for an 8.3 ms single half sine-wave, superimposed on the rated load.

It also features low leakage current and a low forward voltage drop for its class, helping it perform reliably in everyday rectifier and power control circuits.

Through-Hole DO-201AD Package

The diode uses a DO-201AD molded epoxy body with axial leads for through-hole mounting. This package style is easy to install on perfboards, protoboards, terminal strips, and circuit boards designed for leaded components.

The molded epoxy body meets UL 94 V-0 flammability rating, and the matte tin plated leads are solderable for standard electronics assembly work.

Technical Data

Part Number	1N5408
Manufacturer Series	Vishay General Semiconductor 1N5400 Series
Diode Type	General Purpose Plastic Rectifier Diode
Circuit Configuration	Single Diode
Package	DO-201AD, axial lead
Maximum Repetitive Peak Reverse Voltage	1000V
Maximum DC Blocking Voltage	1000V
Maximum RMS Voltage	700V
Maximum Average Forward Rectified Current	3.0A
Peak Forward Surge Current	200A, 8.3 ms single half sine-wave
Maximum Instantaneous Forward Voltage	1.2V at 3.0A
Maximum DC Reverse Current	5.0µA at 25°C, 500µA at 150°C
Typical Junction Capacitance	30pF
Typical Thermal Resistance	20°C/W
Operating Junction and Storage Temperature	-50°C to +150°C
Polarity Marking	Color band denotes cathode end

Key Features

• 1000V maximum repetitive peak reverse voltage
• 3A average forward rectified current rating
• 200A peak forward surge current rating
• Low forward voltage drop
• Low leakage current
• DO-201AD axial lead package for through-hole mounting
• Color band marks the cathode end for easier polarity identification
• Useful for power supplies, inverters, converters, and freewheeling diode applications
• Replaces NTE5809

Common Uses

This 1N5408 rectifier diode is useful for electronics repair, power supply projects, DC protection circuits, battery charger circuits, and general-purpose rectifier designs. It is also a practical part to keep on hand for replacing similar 3A rectifier diodes in compatible circuits.

Always verify the voltage, current, package size, polarity, and thermal requirements of your circuit before substituting or installing any diode.

Photo is an accurate photo of the diode.

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