1N5408 3A 1000V General Purpose Rectifier Diode DO-27

1N5408 3A 1000V General Purpose Rectifier Diode DO-27 is a robust and highly dependable component that engineers rely on for handling medium-to-high current rectification tasks in power supply circuits. As a general-purpose silicon rectifier, this diode effectively converts alternating current (AC) into pulsating direct current (DC) with minimal power loss. Its key strength lies in its high forward current rating of 3 Amperes and an impressive peak inverse voltage (PIV) rating of 1000 Volts. This high-voltage tolerance makes the 1N5408 exceptionally suitable for use in circuits connected directly to the AC mains supply, providing excellent protection against voltage spikes and transients. You will find this diode to be an indispensable workhorse for a vast range of consumer, industrial, and hobbyist power applications.

Key Features:

• High Voltage Tolerance: Features a high Peak Inverse Voltage (PIV) of 1000V, providing a robust safety margin for circuits connected to standard 120V/240V AC lines.
• High Current Capability: Handles a steady forward current of 3 Amperes, which makes it suitable for power supplies, battery chargers, and medium-power applications.
• Low Forward Voltage Drop: Minimizes power dissipation and heat generation, leading to higher efficiency in rectifier circuits.
• Rugged DO-27 Package: The large, axial-leaded package ensures excellent heat dissipation and mechanical stability for through-hole mounting.
• General Purpose Rectification: Optimized for use in various rectifier configurations, including half-wave, full-wave center-tapped, and bridge rectifiers.

Technical Specifications:

• Diode Type: Standard Recovery Rectifier
• Maximum Repetitive Peak Reverse Voltage (V_RRM): 1000 V
• Maximum DC Blocking Voltage (V_R): 1000 V
• Maximum Average Forward Rectified Current (I_O): 3.0 A
• Maximum Peak Forward Surge Current (I_FSM): 200 A (8.3 ms half sine-wave)
• Maximum Forward Voltage Drop (V_F): 1.2 V (at 3.0 A)
• Operating Temperature Range: -55 °C to +150 °C

Mechanical Specifications:

• Package Type: DO-27 (Also known as DO-201AD)
• Mounting Style: Through-Hole (Axial Leads)
• Body Material: Molded plastic case.
• Polarity Marking: A color band designates the cathode (negative) end.

Dimensions:

• Body Diameter: ~5.3 mm
• Body Length: ~9.5 mm
• Lead Diameter: ~1.2 mm
• Lead Length: Minimum 25.4 mm (per side)

Pinout and Wiring:

• Anode (Input): The end without the color band; this is where current enters the diode.
• Cathode (Output): The end marked with the color band; this is where current leaves the diode.
• Wiring Note: Always connect the cathode (band side) to the positive side of the DC circuit. Install the diode with the cathode facing the direction you want the current to flow.

Datasheet Reference:

• Download Datasheet

Commonly Used in:

• DIY Power Supplies: A fundamental component in linear regulated and unregulated power supply circuits.
• Automotive Electronics: Used for reverse polarity protection and general rectification tasks in 12V and 24V systems.
• Industrial Control: Employed in solenoid drivers and relay coils for flyback protection (free-wheeling diodes).

Applications:

• AC-to-DC Conversion: Build half-wave or full-wave bridge rectifiers to convert AC wall power into DC.
• Polarity Protection: Install the diode in series to prevent damage to sensitive components if the power supply is accidentally connected backward.
• Flyback Protection: Use it across inductive loads (like motors or relays) to safely dissipate energy spikes when the power is switched off.

Equivalent Models:

• 1N5406: Identical 3A current rating but with a lower PIV of 600V.
• FR307: A 3A diode with a similar PIV, but it is a Fast Recovery diode, suitable for high-frequency switching applications where the 1N5408 would be too slow.

Package Includes:

• 1 x 1N5408 3A 1000V General Purpose Rectifier Diode DO-27