SM-42TX203

Series:	SM42
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Resistance:	20 kOhms
Power (Watts):	0.25W, 1/4W
Tolerance:	±10%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	11
Adjustment Type:	Top Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	Gull Wing
Size / Dimension:	Square - 0.189" L x 0.138" W x 0.201" H (4.80mm x 3.50mm x 5.10mm)

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Trimmer Potentiometers are a type of adjustable electrical components that are generally used to adjust settings within electrical circuits. SM-42TX203 is a trimmer component that is widely used for applications ranging from electrical control and audio equipment to automotive control systems. This article will focus on the specific application field and working principle of the SM-42TX203 trimmer potentiometer.The SM-42TX203 is a single turn trimmer potentiometer, which is specifically designed to provide a small setting adjustment with minimal setup time. Its main application field is in circuit adjustment, where it can be used to adjust circuit parameters such as gain, offset and linearity. It is also commonly used in audio equipment, where it is used to adjust settings such as volume and balance.When used for circuit adjustment, the SM-42TX203 is typically connected between a signal source and a load, as shown in Fig. 1. The output voltage is then adjusted by turning the shaft of the potentiometer. The adjustment range of the potentiometer is typically limited by its structural design, and is usually in the range of 25Ω – 75Ω.The working principle of the SM-42TX203 is based on the variable resistive element. The pin of the potentiometer is divided into three components, namely; the center pin, the movable wiper and the end pins. The center pin is connected to one end of the resistor element, while the other end of the element is connected to the two end pins. As the wiper is rotated, the resistance between the wiper and each end pin varies, and this in turn adjusts the voltage output of the potentiometer. It should be noted that the SM-42TX203 has a strict adjustment pitch, which is usually 1℃/5°.In addition to the applications of the SM-42TX203 discussed above, the trimmer is also used in automotive control systems. In this application, the potentiometer is used to adjust vehiclespeed, acceleration and direction control. The SM-42TX203 is also commonly used in robotic systems, where it is used to control the angular movement of the robot arm.The SM-42TX203 trimmer potentiometer is a versatile component that can be used in many different applications. Its main application field is in circuit adjustment, where it can be used to adjust circuit parameters such as gain, offset and linearity. It is also commonly used in audio equipment, automotive control systems and robotic systems. The working principle of the trimmer is based on a variable resistive element, wherein the resistance between the wiper and each end pin is adjusted by rotating the wiper shaft. The adjustment range of the potentiometer is typically limited by its structural design, and is usually in the range of 25Ω – 75Ω.

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