CRCW251240R2FKEG
Thick film resistors, 40.2 ohms, 1W, 1%, SMD 2512 size
Manufacturer： ['vishay', 'dale']
series introduction
# Introduction to the CRCW251240R2FKEG Product Series
## 1. Overview
The CRCW251240R2FKEG belongs to a high - performance resistor product series. Resistors are fundamental passive components in electronic circuits, and this particular series is designed to meet the diverse and demanding requirements of modern electronic applications. The "CRCW" typically indicates the product family, "2512" refers to the package size, "40R2" represents the resistance value, and "FKEG" may contain additional information about the product's specific characteristics, tolerance, and other features.
## 2. Package Size (2512)
### Physical Dimensions
The 2512 package size is a standard surface - mount package in the electronics industry. It has specific length and width dimensions. Generally, a 2512 package has a length of approximately 6.35 mm and a width of about 3.18 mm. This relatively large package size offers several advantages.
### Thermal Performance
The larger surface area of the 2512 package allows for better heat dissipation compared to smaller package sizes. When a resistor is in operation, it dissipates power in the form of heat. With the 2512 package, the heat can be more effectively transferred to the surrounding environment, which helps to maintain the stability of the resistor's electrical performance and reduces the risk of overheating. This makes it suitable for applications where relatively high power is dissipated.
### Mounting and Handling
The 2512 package is easy to handle during the manufacturing process. Automated pick - and - place machines can accurately position these resistors on printed circuit boards (PCBs). The larger size also provides more solderable area, which enhances the mechanical stability of the resistor on the PCB, reducing the likelihood of the resistor coming loose due to vibrations or mechanical stress.
## 3. Resistance Value (40R2)
### Precise Resistance
The resistance value of 40.2 ohms is specified with a high degree of precision. This precise resistance value is crucial in many electronic circuits, such as in voltage - dividing circuits, current - limiting circuits, and signal - conditioning circuits. For example, in a voltage - dividing circuit, the ratio of resistances determines the output voltage. A precise 40.2 - ohm resistor ensures that the calculated output voltage is accurate, which is essential for the proper functioning of the overall circuit.
### Tolerance
The resistor in the CRCW251240R2FKEG series is likely to have a tight tolerance. Tolerance refers to the allowable deviation from the specified resistance value. A low - tolerance resistor, such as one with a tolerance of ±1% or even ±0.1%, ensures that the actual resistance value of the resistor remains within a very narrow range around the nominal 40.2 - ohm value. This is important in applications where high - precision is required, such as in medical electronics, aerospace, and high - end audio equipment.
## 4. Electrical Performance
### Power Rating
Due to its 2512 package size, the CRCW251240R2FKEG resistor can handle a relatively high power rating. The power rating indicates the maximum amount of power that the resistor can dissipate without being damaged. A higher power rating allows the resistor to be used in circuits where significant power is dissipated, such as in power supplies and motor control circuits.
### Temperature Coefficient
The temperature coefficient of resistance (TCR) is an important parameter for resistors. It describes how the resistance value changes with temperature. The CRCW251240R2FKEG series is likely to have a low TCR, which means that the resistance
Images for reference
CRCW-2512
SMD Thick Film Side
SMD Thick Film Top