RC0402FR-072KL Series

series introduction

# Introduction to the RC0402FR - 072KL Product Series

## 1. Overview
The RC0402FR - 072KL product series belongs to the realm of surface - mount resistors, which are essential components in modern electronic circuits. These resistors are designed to offer precise resistance values, high reliability, and excellent performance in a wide range of applications. The "RC0402" indicates the physical size of the resistor, following the standard surface - mount device (SMD) package naming convention. The "FR" typically stands for a specific type of resistor material or construction, often denoting a film resistor, which is known for its stability and accuracy. The "07" represents the tolerance code, and "2KL" indicates the resistance value.

## 2. Physical Characteristics

### 2.1 Package Size
The 0402 package is one of the most commonly used small - sized SMD packages. It has a length of approximately 1.0 mm and a width of about 0.5 mm. This compact size makes it ideal for use in densely populated printed circuit boards (PCBs), such as those found in mobile phones, tablets, and other portable electronic devices. The small footprint allows for more components to be placed on a single PCB, enabling miniaturization of electronic products.

### 2.2 Construction
The resistive element in the RC0402FR - 072KL series is likely a thin - film or thick - film construction. Thin - film resistors are made by depositing a very thin layer of resistive material, such as a metal alloy, on a ceramic substrate. This results in a resistor with high precision, low temperature coefficient of resistance (TCR), and excellent long - term stability. Thick - film resistors, on the other hand, are created by screen - printing a resistive paste onto a ceramic substrate and then firing it at a high temperature. They are generally more cost - effective and suitable for applications where high precision is not the primary requirement.

## 3. Electrical Characteristics

### 3.1 Resistance Value
The "2KL" in the part number indicates a resistance value of 2 kΩ (2000 ohms). This value is carefully calibrated during the manufacturing process to ensure that it falls within the specified tolerance range. The resistance value is a crucial parameter in electronic circuits as it determines the amount of current flowing through a particular path according to Ohm's law (V = IR, where V is voltage, I is current, and R is resistance).

### 3.2 Tolerance
The "07" tolerance code typically corresponds to a tolerance of ±1%. This means that the actual resistance value of the resistor can vary by up to 1% from the nominal value of 2 kΩ. For example, a 2 kΩ resistor with a ±1% tolerance can have an actual resistance value ranging from 1980 Ω to 2020 Ω. A low tolerance is important in applications where precise control of current and voltage is required, such as in precision measurement circuits and analog signal processing.

### 3.3 Temperature Coefficient of Resistance (TCR)
The TCR of the RC0402FR - 072KL series is an important characteristic that describes how the resistance value changes with temperature. A low TCR indicates that the resistance value remains relatively stable over a wide temperature range. This is crucial in applications where the operating temperature can vary significantly, such as in automotive electronics, industrial control systems, and outdoor electronic devices.

### 3.4 Power Rating
The power rating of these resistors is determined by their physical size and construction. Due to the small 0402 package, the power rating is relatively low, typically in the range of 0

Images for reference

CRSM RL0402

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Datasheets

Partlist

RC0402FR-072KL