PDB181-E415F-203B

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Rotary potentiometers (also known as rotating potentiometers) and rheostats are two types of adjustable resistance devices used in a variety of applications, from alignment to volume control and instrumentation. The PDB181-E415F-203B (hereinafter referred to as the 203B) is a single turn, 4 wire rotary potentiometer and rheostat, rated at 10kΩ at 25V, supplied in a miniature 14.7mm body. It is designed to provide easy operation and good durability with long life and is commonly used in consumer electronics, automotive, and appliance applications.

The 203B consists of a resistance track, a wiper contact and a body or housing connected to terminals. The resistance track is a continuous loop of resistive material which is curved into a semi-circle and connected at both ends, usually by wire-bonds or soldering. The wiper contact is a metal nib or brush which is connected to a slider and then attached to the housing. As the track is rotated, the slider changes position on the track, changing the resistance accordingly.

When the 203B is used as a potentiometer, the resistance between the wiper contact and the end of the track remains the same and is proportional to the angular displacement. When the 203B is used as a rheostat, the end contacts are connected to the two terminals and the wiper contact is connected to the slider, so that the resistance between the wiper contact and one of the end terminals is adjustable.

The 203B is reliable in operation and capable of handling larger currents, making it suitable for many applications. Common applications include volume or gain control in consumer electronics and sound systems, instrumentation, automotive and appliance control, and alignment adjustment. In addition, the 203B can be used as a temperature regulating device with the addition of a ceramic thermistor.

In summary, the 203B is a multi-purpose device capable of adjusting resistance in both rotary potentiometer and rheostat applications. It is a reliable and robust device, designed to provide precise control in a wide range of applications.

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