OK3955E-R52 Datasheet/PDFThrough Hole Resistors are a type of resistor used for applications requiring a higher power rating than what is available from the standard thick film SMD component. They are designed to be soldered directly to a printed circuit board, and can be used in a variety of electronic components, such as DC-DC converters, linear regulators, motor controllers, and power supplies. The OK3955E-R52 is a through hole resistor from TE Connectivity, and it provides a power rating of up to 742 W.
Design and Applications
The OK3955E-R52 is a small size radial leaded resistor with a power rating of 742 W and a resistance range from 0.1Ω up to 57.98KΩ. It has an operating temperature range of -55°C to +125°C and is designed to provide high reliability and long-term stability in harsh environments such as those found in automotive, telecom, industrial, and defence applications. The resistor is housed in a TO-263-5 package, and is made of metal-oxide film, which is resistant to corrosion, vibration, and high temperatures.
The OK3955E-R52 is specifically designed to be used in applications where robustness and high operating temperature are key, such as automotive, telecom, industrial, and defence components. It can also be used in power supplies, DC-DC converters, linear regulators, motor controllers, and other high-power devices where a standard SMD thick film resistor is not suitable.
Working Principle
The OK3955E-R52 works by utilizing the principle of thermal equilibrium. When current passes through the device, it generates heat due to its resistance, which causes its metal-oxide film to expand. This expansion of the film forces the resistor to move back towards its free state. When there is no current, the resistor returns to its equilibrium with no force acting on it. This thermal equilibrium is what creates a stable resistance value and allows it to continue working within the temperature limits of its environment.
The OK3955E-R52 also has a thermal coefficient of resistance, which helps to reduce temperature drift caused by changes in ambient temperatures. This ensures that it provides a stable resistance value in harsh and varying temperatures.
Advantages
The OK3955E-R52 offers several advantages over its thick film SMD counterparts, including:
- High power rating of up to 742 W
- Resistance range from 0.1Ω up to 57.98KΩ
- Operating temperature range of -55°C to +125°C
- Robust and reliable design
- Thermal coefficient of resistance
Conclusion
The OK3955E-R52 is a through hole resistor from TE Connectivity that provides a power rating of up to 742 W and a resistance range from 0.1Ω up to 57.98KΩ. It is designed to be used in extreme environmental conditions, and has a thermal coefficient of resistance to reduce temperature drift.
It is suitable for applications where robustness and high operating temperature are key, such as automotive, telecom, industrial, and defence components, as well as power supplies, DC-DC converters, linear regulators, motor controllers, and other high-power devices.