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1N5408 Rectifier Diode (5 Piece Pack)

Specification	Details
Current Rating	3.0 Amperes
Voltage Rating	1000V (PIV)
Diode Type	Standard Recovery
Surge Current	200A (Peak)
Package Type	DO-201AD (Axial)
Material	Silicon Junction

Price

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₹ 16.95

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बारकोड: 5470

Product Description

The 1N5408 Rectifier Diode is a high-capacity silicon power diode designed for efficient AC-to-DC conversion and circuit protection. Rated at a robust 3A continuous current and a massive 1000V peak inverse voltage (PIV), it is the industrial "big brother" to the common 1N4007 series. Its large DO-201AD package allows it to handle significant power throughput with lower thermal resistance, making it ideal for battery chargers, bridge rectifiers, and high-voltage power supplies. The 1N5408 is a standard recovery diode, meaning it is optimized for 50Hz/60Hz mains rectification rather than high-frequency switching.

Key Features

High Current Handling: Supports up to 3A of continuous current, nearly three times the capacity of standard hobby-grade diodes.
Superior Voltage Protection: The 1000V PIV rating ensures the diode can safely block high-voltage spikes and back-EMF without breaking down.
High Surge Capability: Can withstand instantaneous current surges up to 200A, protecting the circuit during initial power-on or motor startup.
Low Leakage Current: Precision silicon construction minimizes reverse current flow, increasing overall efficiency in battery-sensitive applications.
Rugged Axial Construction: Features thick, high-conductivity leads and a flame-retardant epoxy case for reliable performance in industrial environments.

Technical Details

Mounting Style: Through-hole (Axial).
Polarity: Cathode indicated by a silver/white band.
Lead Diameter: ~1.2mm (thicker than 1N400x series).

Prototyping and Engineering Tips from Robogears

Building a Bridge Rectifier: To convert 230V AC to DC for a high-power project, you can arrange four 1N5408 diodes in a "Bridge" configuration. This setup will comfortably handle up to a 3A load, providing a reliable DC bus for motor drivers or LED arrays.
Polarity Verification: CRITICAL: Always orient the silver band (Cathode) toward the positive (+) side of the DC circuit or the output. If installed backward, the diode will block current flow entirely in a DC circuit or cause a short circuit in an AC bridge.
Heat Management: While rated for 3A, the diode will get hot during continuous operation at full load. Leave at least 5mm of lead length between the diode body and the PCB to allow for air circulation, and ensure the solder joints are large enough to act as minor "heat sinks."
Flyback Protection: This is the perfect diode for protecting your MOSFETs and Relays from 24V or 48V DC motors. Place the diode in parallel with the motor (Cathode to Positive), and its 1000V rating will easily swallow the massive "Inductive Kickback" spikes when the motor stops.
Fast Switching Limitation: Do not use the 1N5408 in high-frequency DC-DC buck converters (over 1kHz). Because it is a "Standard Recovery" diode, it is too slow to switch off, which will cause overheating. Use a Schottky or Ultra-Fast diode for high-frequency switching instead.

Package Includes

5 x 1N5408 Rectifier Diodes

Disclaimer: Always ensure the peak voltage of your circuit does not exceed the 1000V rating. When soldering, do not apply heat for more than 3-5 seconds to prevent damaging the internal silicon junction. Perform a diode test with a multimeter before installation to ensure the component is functional.

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