Trimmer Potentiometers

A trimmer potentiometer is a variable resistor used to adjust circuits in electronic equipment, most commonly radios and televisions. It gets its name from the small adjustment knob or wheel that can be turned to change the resistance value. Trimmer potentiometers come in single turn, multi-turn, and cordless varieties. The resistive element in a trimmer potentiometer can be made out of metal film or carbon and can come with a variety of coatings depending on the application.

Model 1625940-8 is a trimmer potentiometer with an operating range of 100Ω - 10kΩ. The tolerance is ±20%. It has a dielectric strength of 400V and is designed for both surface mount and through-hole technology applications.

Applications

Trimmer potentiometers are used in a wide variety of applications where precise adjustment of resistance values is necessary. They are used in automotive audio systems and adjustable DC to DC converters, as well as for calibrating temperature or voltage controllers for industrial process control. Other uses include adjusting the current in flashbulbs or switching circuits, audio equipment, variable band-pass filters, or stereo outputs.

Working Principle

Trimmer potentiometers are typically adjusting devices where there is no need to change the value of the resistance regularly. They have a sliding contact which can move freely along the resistive surface and change the resistance value. The adjustable contact is usually attached directly to the resistive element, meaning that the resistance value can be easily adjusted using the adjustment knob.

Trimmer potentiometers are also available with external adjustment knobs. In this case, the adjustment knob is connected to the resistive element by a mechanical linkage, such as a screw or lever. This type of trimmer potentiometer is generally used in applications where the user needs to makes adjustments to the resistance offset or bias.

Conclusion

Model 1625940-8 trimmer potentiometer is a versatile and reliable device for adjusting resistance values in electronic circuits. Its adjustable contact is designed for both surface mount and through-hole application and its operating range is between 100Ω and 10kΩ with ±20% tolerance. This trimmer pot is widely used in automotive audio systems, adjustable DC to DC converters, temperature or voltage controllers, flashbulbs or switching circuits, audio equipment, variable band-pass filters, or stereo outputs.