The KEMET T491B475M020AS is a surface-mount solid tantalum capacitor designed for general-purpose applications. Part of the T491 series, this capacitor offers stable performance and reliability, making it suitable for a wide range of electronic circuits. The "B" case size provides a good balance between capacitance and physical dimensions.

Applications

• Bypass Capacitors: Filtering noise in power rails for integrated circuits.
• Decoupling Capacitors: Providing local energy storage for digital and analog circuits.
• Timing Circuits: Establishing time constants in timers and oscillators.
• DC-DC Converters: Smoothing output voltage in switching power supplies.
• General-Purpose Circuits: Suitable for diverse electronic devices like computers, telecom equipment, and consumer electronics.

Features

• Solid Tantalum Construction: Provides inherent stability and reliability.
• Surface Mount Design: Facilitates automated assembly and reduces board space.
• Standard Grade: Suitable for general-purpose applications.
• RoHS Compliant: Adheres to environmental regulations.
• Stable Electrical Characteristics: Capacitance and ESR remain consistent over temperature and voltage.

Benefits

• Reliable Performance: Solid tantalum construction ensures long-term stability.
• Efficient Assembly: Surface mount design simplifies manufacturing processes.
• Compact Size: B case size offers a good balance between capacitance and size.
• Wide Temperature Range: Operates reliably across a broad temperature spectrum.
• Environmentally Friendly: RoHS compliance ensures adherence to environmental standards.

Additional Details

The T491B475M020AS features a capacitance of 4.7µF with a tolerance of ±20%. Its rated voltage is 20V DC. The operating temperature range is typically -55°C to +125°C. The equivalent series resistance (ESR) is a critical parameter, affecting ripple current handling and voltage drop; refer to the datasheet for specific ESR values at different frequencies. Proper derating of voltage and temperature is essential for long-term reliability. The capacitor is available in standard tape and reel packaging for automated assembly. KEMET offers comprehensive datasheets and application notes to assist in design and implementation.