The aluminum housing of an Aluminum Housed Resistor is a core component, mainly serving three functions: heat dissipation, protection of the resistor core, and auxiliary installation. It directly affects the performance and service life of the resistor, and the details are as follows:
First is the efficient heat dissipation function. When an Aluminum Housed Resistor works, it generates heat due to the passage of current. Aluminum has strong thermal conductivity, which can quickly conduct the heat generated by the resistor core to the surface of the housing. Then the heat is dissipated through the contact between the housing and air or with the cooperation of heat dissipation structures (such as heat sinks), preventing the core from being burned due to overheating at high temperatures and ensuring the resistor operates stably under rated power. Compared with housings made of materials like plastic, the heat dissipation efficiency of aluminum housings can be improved by more than 30%, making them especially suitable for high-power scenarios.
Second is the function of protecting the core. The aluminum housing can physically isolate external impurities such as dust, moisture, and oil stains, preventing these impurities from entering the resistor core and affecting its insulation performance or causing short circuits. At the same time, the housing can also resist slight collisions and squeezes, avoiding damage to the core due to external forces and extending the overall service life of the resistor.
Third is the auxiliary installation function. Aluminum housings are usually designed with structures such as bolt holes and mounting lugs, which facilitate fixing the Aluminum Housed Resistor at the designated position of the equipment (such as the inner wall of the chassis, heat dissipation brackets). This not only makes the installation of the resistor more stable but also further optimizes heat dissipation through the fixing method - for example, attaching the housing closely to the heat dissipation bracket can enhance heat conduction and improve the overall heat dissipation effect.
