The KEMET T520 series is a high-performance polymer tantalum capacitor designed for demanding applications requiring high volumetric efficiency, low ESR, and excellent high-frequency performance. The T520B686M004AE040 specifically denotes a 68µF capacitance, 4V voltage rating, and an ESR of 40 mΩ. These capacitors utilize a conductive polymer cathode, which provides significant advantages over traditional MnO2 tantalum capacitors.

Applications

• DC-DC Converters: Used for input and output filtering to reduce voltage ripple and noise.
• Power Management Circuits: Employed for stable power delivery in various electronic devices.
• High-Frequency Decoupling: Provides effective decoupling for sensitive integrated circuits.
• Portable Electronics: Ideal for use in smartphones, tablets, and other mobile devices due to their small size and high performance.
• Networking Equipment: Used in routers, switches, and other networking devices for power supply filtering and decoupling.

Features

• Conductive Polymer Cathode: Offers lower ESR and improved reliability compared to MnO2 capacitors.
• Low ESR (40 mΩ): Minimizes power loss and improves circuit efficiency.
• High Volumetric Efficiency: Provides high capacitance in a small package.
• Stable Capacitance Over Temperature and Voltage: Ensures consistent performance across a wide range of operating conditions.
• RoHS Compliant: Meets environmental regulations for hazardous substances.

Benefits

• Improved Circuit Performance: Lower ESR results in reduced voltage ripple and improved transient response.
• Increased Reliability: Conductive polymer cathode eliminates the risk of ignition failure associated with MnO2 capacitors.
• Miniaturization: High volumetric efficiency allows for smaller and lighter designs.
• Longer Lifespan: The robust design and stable materials contribute to a longer operational life.
• Reduced Power Consumption: Lower ESR minimizes power dissipation, leading to increased energy efficiency.

Additional Details

The T520B686M004AE040 capacitor utilizes a molded case for enhanced mechanical protection and environmental stability. It is designed for surface mount technology (SMT) assembly. The operating temperature range typically spans from -55°C to +105°C. The part is lead-free and compatible with modern soldering processes. This capacitor offers excellent performance characteristics, making it suitable for demanding industrial and consumer applications. The ripple current rating should be carefully considered during design to ensure reliable operation. Detailed datasheets are available from KEMET, providing comprehensive specifications and performance curves.