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Trimmer Potentiometers

Introduction

A trimmer potentiometer is a three-terminal variable resistor. It is a miniature-sized adjustable potentiometer that can be used to finely tune or calibrate circuits. Trimmer potentiometers are particularly useful in applications where adjustment may not only be necessary, but frequent, and where the use of a convenient, robust and economical trimmer device is the most appropriate approach.

3290H-1-200 application field and working principle

The 3290H-1-200 is a trimmer potentiometer, in a mountable 4-piece package configuration designed to withstand harsh environmental and physical conditions. The high mechanical strength and reliability of this product make it suitable for an array of applications. The 3290H-1-200 is designed to provide improved performance over conventional trimmers with a longer service life, high power capability, low theteresis and improved level of linearity.

The 3290H-1-200 trimmer potentiometer has three terminals: two fixed terminal pins (C) and a rotary contact (A). The two fixed terminal pins (C) should be connected externally to a voltage supply V+, while the rotary contact (A) applies a voltage divider of rheostat value in the idle state. By rotating the knob, the resistance of the internal rotor is changed, allowing for the desired voltage division ratio to be adjusted accordingly. This allows for the adjustment of current and voltage levels in the circuit.

Applications

The 3290H-1-200 trimmer potentiometer is ideal for use in a variety of applications such as:

• Potentiometer control
• Electric control in automatic systems
• Voltage regulator circuits
• Volume controls in audio systems
• Stabilizing voltage lines
• Adjustment of timer circuits
• DC motor speed control
• Thermo-electric controls

Conclusion

The 3290H-1-200 trimmer potentiometer is a useful tool that can be used to fine-tune or adjust circuits, and is suitable for a variety of applications. The high mechanical strength and reliability of the product make it a dependable choice for use in a wide range of applications.

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