GRM219R72A472K

series introduction

# Introduction to the GRM219R72A472K Product Series

## 1. Overview
The GRM219R72A472K belongs to a high - performance series of multilayer ceramic capacitors (MLCCs) manufactured by Murata, a globally recognized leader in electronic component technology. These capacitors are widely used in a vast array of electronic applications due to their excellent electrical characteristics, reliability, and compact size.

## 2. Product Naming Convention
Let's break down the product code "GRM219R72A472K" to understand its key features:
- **GRM**: This is the basic series code for Murata's general - purpose multilayer ceramic capacitors. It indicates that the capacitor is designed for a wide range of common electronic circuits.
- **219**: Represents the size of the capacitor. In this case, it corresponds to a 1.6mm x 0.8mm x 0.8mm (length x width x height) package, which is a relatively small form - factor, making it suitable for applications where space is at a premium.
- **R7**: Specifies the dielectric material. The "R7" dielectric is a Class II dielectric, which offers a high capacitance value relative to its size. It has a temperature coefficient of ±15% over a temperature range of - 55°C to +125°C, providing stable performance across a wide operating temperature.
- **2**: Indicates the rated voltage. Here, it represents a rated voltage of 100V, meaning the capacitor can safely operate in circuits with a maximum voltage of 100 volts.
- **A**: This is a code related to the capacitance tolerance. In this series, "A" typically represents a tighter tolerance range.
- **472**: The capacitance value is encoded in this part of the code. Using the standard three - digit code for capacitors, the first two digits (47) are the significant figures, and the third digit (2) is the multiplier. So, \(47\times10^{2}pF = 4700pF=4.7nF\).
- **K**: Represents the capacitance tolerance. A "K" tolerance means the actual capacitance value can vary by ±10% from the nominal value of 4.7nF.

## 3. Electrical Characteristics

### Capacitance
The nominal capacitance of the GRM219R72A472K is 4.7nF. This value is carefully controlled during the manufacturing process, with a tolerance of ±10%. The capacitance stability is also influenced by factors such as temperature, voltage, and frequency.

### Temperature Coefficient
As mentioned earlier, the "R7" dielectric has a temperature coefficient of ±15% over the temperature range of - 55°C to +125°C. This means that the capacitance value may change within this percentage range as the temperature varies. Despite this variation, the capacitor still provides reliable performance in most real - world applications.

### Rated Voltage
With a rated voltage of 100V, the GRM219R72A472K can handle relatively high - voltage circuits. It is designed to withstand the specified voltage without significant degradation in performance or risk of breakdown.

### Equivalent Series Resistance (ESR)
The ESR of the GRM219R72A472K is relatively low. A low ESR is beneficial as it reduces power losses in the capacitor, especially in high - frequency applications. This results in improved efficiency and less heat generation, which can enhance the overall reliability of the circuit.

### Self - Resonant Frequency (SRF

Images for reference

GRM Series_0805_0.85

0805 (2012 Metric)

GRM Series_0805_0.85

Datasheets

• GRM219R72A472KA01 Ref Sheet
• Chip Monolithic Ceramic Caps Part Numbering
• PDF 3

Partlist