The adjustable resistance is also called variable resistance. Its English is Rheostat. The adjustable resistance is a kind of resistance. The resistance value of the adjustable resistance can be adjusted manually to meet the needs of the circuit. Adjustable resistance can be divided into many different types and types according to the size of the resistance value, the adjustment range, adjustment form, manufacturing process, production materials, volume size, etc., divided into: adjustable resistance of electronic components, adjustable porcelain plate Resistors, SMD adjustable resistors, wirewound resistors, etc. The nominal value of the adjustable resistance is that the standard can be adjusted to the maximum resistance of the resistance. In theory, the resistance of the adjustable resistance can be adjusted to any value within 0 and the nominal value, but because of the actual structure and design accuracy requirements, etc. For reasons, it is not always easy to achieve "arbitrary" requirements by 100%. It is only "substantially" adjusted within the allowable range to change the resistance.
SR085 8mm Cermet Adjustable Power Resistor Adjustable Power Resistor are designed to withstand and dissipate large amounts of power. In general they have a power rating of at least 5 Watt. They are made from materials with a high thermal conductivity, allowing efficient cooling. They are often designed to be coupled with heat sinks to be able to dissipate the high amount of power. Some might even need forced air or liquid cooling while under maximum load. Some are wire wound, some are made from wire grids for ease of cooling, but the common thing for all power resistors is that they are built to dissipate the most power while keeping their size as small as possible. An example use for power resistors are load banks used to dissipate power generated during engine braking in vehicles using electrical motors, such as locomotives or trams.