The GRM21BB31H474KA87L is a multilayer ceramic capacitor (MLCC) manufactured by Murata Electronics North America. MLCCs are ubiquitous passive components used for various purposes in electronic circuits, including decoupling, bypassing, filtering, and energy storage.

Applications

• Decoupling capacitors in power supplies: Provide a stable voltage source for integrated circuits by filtering out noise and voltage fluctuations.
• Bypass capacitors in digital circuits: Shunt high-frequency noise to ground, preventing it from interfering with circuit operation.
• Filtering in audio circuits: Block unwanted frequencies and allow desired frequencies to pass through.
• Timing circuits: Used in conjunction with resistors to create time delays.
• Resonant circuits: Form resonant circuits with inductors for applications such as wireless communication and signal generation.

Features

• High capacitance value: 0.47µF (microfarads) allows for effective filtering and energy storage.
• Small size: 0805 case size (2.0mm x 1.25mm) makes it suitable for high-density circuit boards.
• High voltage rating: 50V (volts) allows for use in a variety of power supply and signal processing applications.
• Temperature characteristic B: This indicates a specific temperature coefficient of capacitance, defining how the capacitance changes over temperature. This is crucial for stability in various operating conditions.
• RoHS compliant: Restriction of Hazardous Substances directive compliance ensures environmental friendliness.

Benefits

• Improved circuit stability: Effective decoupling and bypassing reduces noise and voltage fluctuations, leading to more reliable circuit operation.
• Reduced electromagnetic interference (EMI): Filtering out high-frequency noise minimizes EMI, preventing interference with other electronic devices.
• Smaller circuit board size: Compact 0805 size allows for high-density component placement, reducing the overall size of the circuit board.
• Long lifespan: MLCCs are known for their high reliability and long lifespan.
• Cost-effective: MLCCs are generally a cost-effective solution for capacitance requirements.

Additional Details

The GRM series from Murata is a popular choice for general-purpose applications. The GRM21BB31H474KA87L utilizes a ceramic dielectric material, providing excellent stability and performance characteristics. It is designed for reflow soldering, a standard surface mount technology (SMT) assembly process. The specific 'B' temperature characteristic provides designers with predictable performance over a specified temperature range. Detailed specifications can be found on the Murata website or in the product datasheet, including insulation resistance, dissipation factor, and other relevant parameters.