The RUR420U is a hyperfast rectifier diode manufactured by Fairchild/ON Semiconductor. It is designed for applications requiring efficient and rapid switching, making it suitable for various power electronics circuits. This diode offers a combination of low forward voltage drop and fast reverse recovery time, which contributes to reduced power losses and improved overall system performance.

Applications

• Power supplies
• Welding Power supplies
• Freewheeling diodes in switching power supplies
• Power inverters
• Motor control circuits

Features

• Hyperfast recovery time (typically around 25ns)
• Low forward voltage drop (typically around 1.7V at 4A)
• High reverse voltage capability (200V)
• High surge current capability (60A)
• Operating junction temperature: -65°C to +175°C
• Isolated Mounting Tab

Benefits

• Reduced switching losses in power circuits, leading to higher efficiency.
• Lower operating temperatures due to reduced power dissipation.
• Improved reliability and lifespan of power electronic systems.
• Enhanced performance in high-frequency applications.
• Simplified circuit design due to the diode's fast switching characteristics.

Additional Details

The RUR420U is typically available in a TO-220 package, which facilitates easy mounting and heat sinking. It's crucial to manage the heat generated by the diode under high current conditions to ensure optimal performance and prevent thermal runaway. The diode's hyperfast recovery characteristics make it suitable for applications where minimizing reverse recovery current and its associated noise are critical. It is a planar epitaxial construction.

The device features a high avalanche energy, which is specified with reasonable conditions, and is tested to assure operation under those conditions. This is a design aspect that assures the diode can withstand a certain level of transient overvoltage without failing, enhancing the ruggedness of the application.