The RUR440S is a hyperfast rectifier diode manufactured by Intersil. It is specifically designed for use in applications that demand rapid and efficient switching, making it a valuable component in various power electronics designs. The key advantages of this diode include a low forward voltage drop and a very fast reverse recovery time, both of which contribute to reduced power losses and improved system efficiency.

Applications

• Switch Mode Power Supplies (SMPS)
• Power Factor Correction (PFC) circuits
• Uninterruptible Power Supplies (UPS)
• High-frequency inverters
• Freewheeling diodes in motor control

Features

• Hyperfast recovery time (typically around 35ns)
• Low forward voltage drop (typically 1.3V at 4A)
• High reverse voltage capability (400V)
• Low leakage current
• High surge current capability (40A)
• Operating junction temperature: -65°C to +175°C

Benefits

• Reduced switching losses, leading to improved energy efficiency.
• Lower heat dissipation, enhancing the reliability and lifespan of the system.
• Improved performance in high-frequency switching applications.
• Simplified circuit design due to predictable and fast switching characteristics.
• Minimized EMI (Electromagnetic Interference) due to reduced reverse recovery current.

Additional Details

The RUR440S is typically housed in a TO-220AC package, which provides effective heat dissipation and ease of mounting. Adequate heat sinking is crucial, especially when operating at higher current levels, to ensure optimal performance and prevent overheating. The hyperfast recovery characteristics of the RUR440S make it well-suited for designs where minimizing reverse recovery current and associated noise is paramount.

The internal construction is planar, and this part is also qualified to handle specific avalanche energy conditions. It has a hermetic package.