RN55C4020FRSL

Through Hole Resistors are a type of resistor which are characterized by their construction, consisting of a cylindrical casing (usually ceramic, glass, or plastic) with leads projecting from either end. These leads are usually of different lengths, and loop around to make contact with the external circuitry. The resistor itself is generally a thin, flat disc of conductive material, often copper, which is commonly referred to as the “wiper”.

The RN55C4020FRSL is a solution-based metal-oxide thin-film resistor developed by the Rohm Corporation with low TCR (temperature coefficient of resistance) characteristics and tight tolerance (±0.005%). It has a voltage rating of 2W and a temperature range from -65°C (-85°F) to +200°C (+392°F). The silicone coating also offers outstanding stability, reliability, and protection from harsh environments.

The application fields of the RN55C4020FRSL are mainly related to precision, highly stable resistors in control or switching circuits. They offer excellent performance in power factor correction (PFC) circuits, especially in applications with strict requirements like industrial equipment, renewable energy systems, and motion control. The resistor can also be used to regulate and stabilize electric currents in various motor controls and load applications.

The working principle of the RN55C4020FRSL involves the use of temperature coefficient of resistance (TCR) to ensure precise and stable resistance values. The main task of the resistor is the adjustment of the gate voltage in a power factor controller (PFC) to detect the current consumed by the power supply. The resistor acts as a voltage divider which, in combination with several other elements, is used to sense the current on the input side. The effective resistance value is determined by the current-sense resistor and the ratio of the other components in the circuit.

The current-sense resistor works by comparing the current on the output of the rectifier to the input current of the switch, thereby adjusting the gate voltage of the switch accordingly. This allows the PFC circuit to sense the current drawn by the load or the current sent to the load in a continuous feedback loop. The RN55C4020FRSL also provides high voltage stability with its excellent TCR characteristic.

The RN55C4020FRSL is a reliable and precise solution for many through-hole resistor applications requiring high voltage stability and precision. Its high-temperature coefficient of resistance (TCR) provides a reliable and accurate level of resistance needed for accurate and stable results in PFC, motor control, and load applications. The silicone coating enables it to withstand harsh environments, and its wide range of resistance ensures that it is suitable for a variety of applications.