China 1N5400 to 1N5408 Rectifier Diodes 3A 50V-1000V DO-27 Package - Reliable Suppliers and Factory Options
Function
Unidirectional Conduction
Acts as an electronic "one-way valve": it conducts current freely when forward-biased and blocks current when reverse-biased, which is the fundamental characteristic of all diodes.
AC-DC Rectification
Converts alternating current (AC) into pulsating direct current (DC), the most common application. It is used in half-wave, full-wave, and bridge rectifier circuits to provide DC power for electronic devices.
Freewheeling (Flyback) Protection
In inductive loads (e.g., motors, relays, solenoids), it absorbs the reverse electromotive force (EMF) generated when the load is turned off. This prevents high-voltage spikes from damaging other components in the circuit.
Circuit Protection
Its high reverse voltage rating suppresses voltage surges and blocks reverse current, providing basic overvoltage and reverse connection protection for power circuits.
Product Specifications
Product Dimension
Installation method
The maximum soldering temperature for the 1N5408 is 275°C for 10 seconds. Set the soldering iron temperature to 300~350°C, and limit the soldering time per pin to no more than 3 seconds.
Application
AC-DC rectification in switching power supplies, adapters, and chargers
Freewheeling protection for inductive loads (motors, relays, solenoids)
Rectification and buffering in inverters and frequency converters
Power rectification and protection in household appliances and industrial control systems
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FAQ
A: No. The 1N5408 is a conventional rectifier diode with a long reverse recovery time. It is only suitable for low-frequency (<100kHz) applications and is not recommended for high-frequency fast-recovery rectifier circuits.
A: Yes. In high-current applications, multiple 1N5408 diodes can be connected in parallel to increase the rated current. However, it is necessary to ensure uniform current distribution in each branch to avoid local overheating and damage caused by parameter differences.
A: The lead bending position should be at least 2mm away from the diode body to prevent lead breakage or internal chip damage caused by stress concentration. The leads can be tinned before soldering to improve soldering reliability.
A: The color ring end of the diode body is the cathode (negative pole), and the other end is the anode (positive pole). Soldering must strictly correspond to the circuit markings; reversed polarity will cause the circuit to fail and may even burn out the subsequent components.
A: The maximum soldering temperature for the 1N5408 is 275°C for 10 seconds. When using a manual soldering iron, set the temperature to 300~350°C, and limit the soldering time per pin to no more than 3 seconds to prevent thermal damage.
A: The 1N5408 is widely used for AC-DC rectification in switching power supplies, adapters, and chargers; freewheeling protection for inductive loads (motors, relays, solenoids); rectification and buffering in inverters; and general power rectification in household appliances and industrial controls.
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