What should we consider when selecting adjustable potentiometer models? The following aspects should be clear before we choose adjustable potentiometers.
When the voltage applied across the adjustable potentiometer reaches a certain level, a breakdown phenomenon occurs, resulting in an irreversible increase in resistance or an open circuit. Therefore, it is necessary to limit the applied voltage. The breakdown of resistors typically happens between the leads or between the spiral grooves. The breakdown voltage between leads depends on the shape, distance between leads, and the ambient atmospheric pressure. Hence, the breakdown voltage between the slots of the resistor depends on the quality of the slots, slot width, and the voltage resistance performance of the applied insulating material. The current value determined based on the nominal resistance and rated power dissipation is known as the rated current.
It is evident from the above explanation that when the rated power consumption remains constant, the smaller the resistance value, the greater the rated current. For low-resistance resistors, their contact resistance constitutes a significant portion. As current passes through, more power is consumed at this point, leading to increased heat generation. Additionally, observing from the contact area, due to the high current density in this region, localized overheating is inevitable, which can cause premature aging. Furthermore, if there are high-voltage electrical pulses in the circuit, it is advisable to choose glass enamel film potentiometers.
Three Principles for Selecting Variable Potentiometer Models:
We have selected potentiometers produced by manufacturers with quality, functional, cost-performance, efficiency, and service advantages.
2. Select potentiometer manufacturers from the catalog that meet the above requirements and place direct orders for the potentiometers.
We select potentiometers manufactured on production lines certified by recognized institutions, adhering to high-quality standards.
