SM-3A204

Series:	SM3
Packaging:	Bulk
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Resistance:	200 kOhms
Power (Watts):	0.125W, 1/8W
Tolerance:	±20%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	11
Adjustment Type:	Side Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	J Lead
Size / Dimension:	Square - 0.154" L x 0.154" W x 0.134" H (3.90mm x 3.90mm x 3.40mm)

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Trimmer Potentiometers: SM-3A204 Application Field and Working Principle

Trimmer Potentiometers, also commonly referred to as “trimpots”, are miniature three-terminal variable resistors that are used to adjust the resistance of a circuit. The most popular type of trimmer potentiometers is the SM-3A204, typically used in electronic circuits. This article will discuss the application field and working principle of the SM-3A204 trimmer potentiometer.

Application Field of the SM-3A204 Trimmer Potentiometer

The SM-3A204 trimmer potentiometer is a three-terminal variable resistor that is typically used for precision adjustment of resistance values in circuit applications. An example of a circuit in which a trimpot may be used is an adjustable voltage regulator. These trimpots are also useful for adjusting the resistance of resistor networks, which can be useful for tuning circuits or for calibrating analog devices.The SM-3A204 trimmer potentiometer is also commonly used in audio applications such as volume control and tone adjustment. The SM-3A204 has a wide range of resistance values, from 10 Ω to several kiloohms, which makes it an ideal choice for applications requiring precision adjustments.

Working Principle of the SM-3A204 Trimmer Potentiometer

The SM-3A204 trimmer potentiometer is a three-terminal variable resistor, which consists of a resistive element and a wiper terminal. The resistive element is comprised of two metal plates separated by an insulating material, such as a ceramic or glass substrate. The wiper terminal is a conductive element which is connected to the resistive element through a spring or other mechanical connection.The operation of the trimmer potentiometer is quite simple – when the wiper terminal is moved along the resistive element, it changes the total resistance of the circuit. The resistance value can be adjusted by turning the shaft of the trimmer potentiometer, which moves the wiper terminal along the resistive element. Turning the shaft clockwise increases the resistance value while turning it counter-clockwise decreases the resistance value.

Conclusion

The SM-3A204 trimmer potentiometer is a useful three-terminal variable resistor that is used for precision adjustment of resistance values in a variety of circuit applications. It is most commonly used in audio applications such as volume control and tone adjustment, but can also be used for adjusting the resistance of resistor networks or for tuning circuits. The trimmer potentiometer functions by turning the shaft, which moves the wiper terminal along the resistive element and thereby adjusting the total resistance of the circuit.

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