MCR03ERTJ203
Compact 20K ohm resistors for surface-mount electronic circuits
Manufacturer： rohm
series introduction
# Introduction to the MCR03ERTJ203 Product Series
## 1. Overview
The MCR03ERTJ203 is a highly specialized and reliable product series within the realm of electronic components. These components play a crucial role in a wide range of electronic circuits, offering precise electrical characteristics and excellent performance.
## 2. Product Type and Function
### Type
The MCR03ERTJ203 belongs to the category of resistors. Resistors are fundamental passive electronic components that are used to control the flow of electric current in a circuit. They oppose the flow of electrons, thereby reducing the current and also helping to divide voltages.
### Function
- **Current Limiting**: In many electronic circuits, it is essential to limit the amount of current flowing through a particular component. The MCR03ERTJ203 resistors can be used to achieve this. For example, in an LED circuit, a resistor is used to prevent excessive current from flowing through the LED, which could otherwise damage it.
- **Voltage Division**: They are also used in voltage - dividing circuits. By using two or more resistors in series, the input voltage can be divided into smaller, more manageable voltages. This is useful in applications such as sensor circuits, where a specific voltage level needs to be provided to a sensor for proper operation.
## 3. Technical Specifications
### Resistance Value
The "203" in the MCR03ERTJ203 code indicates the resistance value. Using the standard resistor - marking code, the first two digits (20) are the significant figures, and the third digit (3) is the multiplier. So, the resistance value of the MCR03ERTJ203 is \(20\times10^{3}\Omega= 20k\Omega\).
### Tolerance
The "J" in the product code represents the tolerance of the resistor. A "J" tolerance indicates a ±5% tolerance level. This means that the actual resistance value of the MCR03ERTJ203 resistor can vary by up to 5% from the nominal value of 20kΩ. For example, the actual resistance could be anywhere between \(20k\Omega\times(1 - 0.05)=19k\Omega\) and \(20k\Omega\times(1 + 0.05)=21k\Omega\).
### Power Rating
The MCR03ERTJ203 typically has a power rating that is suitable for low - power applications. The specific power rating depends on the design and construction of the resistor, but it is often in the range of a few hundred milliwatts. This power rating determines the maximum amount of power that the resistor can dissipate without being damaged. For example, if a resistor is dissipating more power than its rated value, it may overheat and fail.
### Temperature Coefficient
The temperature coefficient of the MCR03ERTJ203 is an important parameter that describes how the resistance value changes with temperature. A low temperature coefficient indicates that the resistance value remains relatively stable over a wide range of temperatures. This is crucial in applications where the operating temperature can vary significantly, such as in automotive or industrial electronics.
## 4. Physical Characteristics
### Size
The "03" in the product code may refer to the size of the resistor. It is likely to be a surface - mount device (SMD) with a specific package size. Surface - mount resistors are popular in modern electronics due to their small size, which allows for more compact circuit designs. The small size also enables high - density PCB (Printed Circuit Board) layouts, which are essential for miniaturized electronic devices.
### Construction
The MCR03ERTJ20
Images for reference
MCR006
RHM Series Top
RHM Series Side