RWR78S4020FRB12 Resistors

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Through Hole Resistors are among the most important passive components in electric and electronic circuits. They are essential for controlling current flow and providing signal conditioning in analog circuitry. One type of through hole resistor, the RWR78S4020FRB12, is a unique device typically employed in high power systems. It is designed for TO-247 packages in which the terminal leads are through hole with an outer cylindrical shank. The resistor also features a wide operating temperature range and a high power rating, making it suitable for a variety of applications.

The RWR78S4020FRB12 is a reinforced film resistor with a voltage rating of 78V and a power rating of 40W. It has a low thermal resistance which prevents the device from overheating when current flows through it. The resistance value can be between 0 and 3 ohms, and the tolerance of the nominal resistance can be as low as 10%. The device is available in a variety of sizes and shapes to suit different mounting requirements. Its insulation and protection features make it suitable for use in both indoor and outdoor environments.

The RWR78S4020FRB12 is ideal for applications that require a high current rating. It can be used in power supplies, battery chargers, solar panels, LED lighting and motor controllers, among other applications. Its tolerance is also useful for applications that require precise current control for greater accuracy. It is often found in automotive, defense and aerospace industries.

The working principle of the RWR78S4020FRB12 is relatively simple. It consists of two metal plates, each with a thin tantalum barrier between them. When current flows through it, the resistive film between the two plates heats up, due to the ohmic resistance, which leads to a rise in temperature. This rise in temperature causes an increase in effective resistance and dissipates the heat generated from the current flowing through the resistor.

The resistor also ensures consistent and reliable performance when exposed to temperature changes. This helps to maintain stable and efficient thermal management in the system. Additionally, it also offers enhanced protection against overloads, current surges or short circuits due to its high tolerance and the high current rating of the resistor. This makes the device ideal for use in high power applications.

In summary, the RWR78S4020FRB12 is an excellent choice for high power applications that require precise control of current flow and efficient thermal management. Its wide operating temperature range, high power rating, and low thermal resistance make it a great option in various industries. Its stable performance and reliable operation make it a popular choice in a wide variety of applications.

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