CRCW251290K9FKEG
High-power thick film resistors for precision electronic circuits
Manufacturer： vishay
series introduction
# Introduction to the CRCW251290K9FKEG Product Series
## 1. Overview
The CRCW251290K9FKEG belongs to a high - performance resistor product series. Resistors are fundamental passive electronic components that play a crucial role in a wide range of electronic circuits. This particular series is designed to meet the demanding requirements of modern electronic applications, offering precise resistance values and reliable performance.
## 2. Product Naming Convention
- **CRCW**: This is the general series code for the resistor product line. It indicates the specific family of resistors, which often share common manufacturing processes and design characteristics.
- **2512**: This represents the physical size of the resistor, known as the surface - mount device (SMD) package size. In the case of 2512, it means the resistor has a length of 0.25 inches (6.35 mm) and a width of 0.12 inches (3.05 mm). This relatively large size allows for better power dissipation and mechanical stability compared to smaller SMD packages.
- **90K9**: This denotes the resistance value of the resistor. Here, the resistance is 90.9 kΩ (kilo - ohms). The value is specified with a high degree of precision, which is essential for many electronic circuits where accurate resistance is required for proper operation.
- **F**: The letter “F” represents the tolerance of the resistor. In the resistor color - code and marking system, “F” indicates a tolerance of ±1%. This means that the actual resistance value of the CRCW251290K9FKEG resistor can vary by a maximum of 1% from the specified 90.9 kΩ value. A low tolerance is crucial in applications where precise voltage division, current limiting, or signal conditioning is necessary.
- **KEG**: These additional characters are often used by the manufacturer to indicate specific product features, manufacturing batches, or other internal information.
## 3. Electrical Characteristics
### Resistance Value
As mentioned earlier, the nominal resistance value of the CRCW251290K9FKEG is 90.9 kΩ. This value is carefully controlled during the manufacturing process to ensure that it falls within the ±1% tolerance range. The accurate resistance value is essential for applications such as voltage dividers, where the output voltage is directly proportional to the ratio of the resistances in the circuit.
### Power Rating
Due to its 2512 package size, the CRCW251290K9FKEG typically has a relatively high power rating. It can handle a certain amount of electrical power without overheating or experiencing significant changes in its electrical properties. The power rating is an important consideration in applications where the resistor may be subjected to high currents or voltages. For example, in power supply circuits or high - power amplifier circuits, a resistor with an appropriate power rating is required to ensure reliable operation.
### Temperature Coefficient
The temperature coefficient of resistance (TCR) is another important electrical characteristic of the CRCW251290K9FKEG. It indicates how the resistance value of the resistor changes with temperature. A low TCR means that the resistance value remains relatively stable over a wide temperature range. This is crucial in applications where the operating temperature may vary, such as in automotive electronics, industrial control systems, and outdoor electronic devices.
## 4. Physical Characteristics
### Package Size
The 2512 package size of the CRCW251290K9FKEG makes it suitable for a variety of printed circuit board (PCB) designs. It is large enough to be easily handled during the PCB assembly process, which can improve the manufacturing efficiency
Images for reference
CRCW-2512
SMD Thick Film Side
SMD Thick Film Top