Series:	89
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Resistance:	20 Ohms
Power (Watts):	0.75W, 3/4W
Tolerance:	±20%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	20
Adjustment Type:	Side Adjustment
Resistive Material:	Cermet
Mounting Type:	Through Hole
Termination Style:	PC Pins
Size / Dimension:	Rectangular - 0.750" x 0.190" Face x 0.250" H (19.05mm x 4.83mm x 6.35mm)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Trimmer Potentiometers

Introduction to 89PR20LF

A trimmer potentiometer (also known as a preset or trim pot) is a small device that adjusts an electrical circuit\'s parameters. Its main purpose is to adjust the gain of an amplifier (amplifier gain control) or the frequency of a tuned circuit. The 89PR20LF is a type of trimmer potentiometer made by Bourns, Inc. It is a single-turn, top-adjusted design trimmer pot, available in a variety of configurations and sizes. In terms of its physical appearance, the 89PR20LF is a slim and slightly cylindrical device, with a top adjustment knob for tuning.

Application Fields

The 89PR20LF is a versatile component, and can be used for a variety of applications. Its main application fields include audio electronics (amplifier gain control and tone control), RF digital communications, and instrumentation. In audio electronics, the 89PR20LF can be used to adjust the gain of an amplifier for loudness. It can also be used to adjust the tone of a speaker, with settings for treble, mid, and bass. In RF digital communications, the 89PR20LF can be used to fine-tune the frequency of the receiver or the transmitter, for higher accuracy. In instrumentation, the 89PR20LF can be used to adjust the reading or accuracy of a measuring device, such as a voltmeter or thermometer.

Working Principle

The 89PR20LF operates in a relatively simple manner. It works on the principle of resistance. As the knob at the top of the device is turned in either direction, the resistance of its internal resistive element changes. The resistive element in the 89PR20LF is made of a ceramic material, allowing it to maintain a high degree of precision even after significant use. The range of resistance of the 89PR20LF varies depending on the specific model, but it typically ranges from around 500Ω to 80KΩ.The 89PR20LF can be used in either a standard two-wire configuration or a three-wire configuration. In a two-wire configuration, one of the two leads is connected to either side of the resistive element, while the other lead is connected to the top adjustment knob. This allows the user to adjust the resistance of the 89PR20LF as needed. In a three-wire configuration, an extra wire is connected to the middle of the resistive element, allowing for more accurate adjustment.

Conclusion

The 89PR20LF is a versatile trimmer potentiometer with a broad range of applications. It is a single-turn, top-adjustment design, which makes it particularly easy to tune. It is also a high-precision device, allowing for extremely fine tuning of the electrical parameters in a circuit. While the 89PR20LF is an excellent choice for amplifier gain control and RF tuning, it is also suitable for a variety of other applications.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description