SM-42TB103

Series:	SM42
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Resistance:	10 kOhms
Power (Watts):	0.25W, 1/4W
Tolerance:	±10%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	11
Adjustment Type:	Side Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	Gull Wing
Size / Dimension:	Square - 0.189" L x 0.181" W x 0.154" H (4.80mm x 4.60mm x 3.90mm)

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SM-42TB103 trimmer potentiometers are widely used in fields such as consumer electronics, communication, automotive, and medical. It is one of the most common types of trimmer potentiometers being used in the industry.The SM-42TB103 has a compact size and low profile design. It consists of a spindle, a housing, a wiper plate, and two rotors. The spindle is the main body of the trimmer potentiometer. It\'s body is made from a composite material with a mixture of synthetic and metal components. This gives the tool its strength and flexibility. The wiper plate is the part of the trimmer that actually makes contact with the moving parts of the circuit. This is usually made from a combination of copper, brass, and stainless steel. The rotors are the two rotor arms that cause the motion of the spindle as it rotates.The working principle of the SM-42TB103 trimmer potentiometer is based on the mechanical action of the rotors. The rotors move the spindle as it rotates. When the spindle is stopped, for instance when the knob of the trimmer is in its maximum or minimum position, the rotors are engaged and transmit the stepped motion of the spindle to the wiper plate. This causes the wiper plate to make contact with the components of the circuit board. Depending on the movement of the rotors, the resistance of the wiper plate at certain points changes. This resistance will be measured by the circuit components and will regulate the controlling of certain functions.To install the SM-42TB103, the trimmer is inserted into a PCB, and the PCB is mounted onto the board so it\'s positioned correctly. Then the rotors has to be secured to the housing with screws. Lastly, the wiper plate is attached to the spindle with a fastening mechanism and the trimmer is ready to use.The SM-42TB103 has several advantages over other trimmer potentiometers. It is mechanically resistant, so it works for a long time in perfect condition. It also has excellent performance, which can be measured in terms of its accuracy and reproducibility. It does not consume much power and is suitable to be used in high frequency circuits. Furthermore, its low profile design allows it to fit into smaller spaces, although there is a considerable installation time associated with it.In order to maintain the trimmer potentiometer, dust can be a major factor offering resistance. Its necessary to periodically check the spindle and wiper for dust and residues and vacuum or wipe it off as necessary. To prevent mechanical wear, the rotors should be lubricated from time to time with a few drops of machine oil.The SM-42TB103 trimmer potentiometer is a great choice for controlling encoders, motors, and other common applications in consumer electronics, communication, automotive, and medical applications. It is mechanically reliable, precise, and has a low power consumption. It also has a good performance in high frequency circuits and fits perfectly in spaces, even though installation time can be considerable. To keep it functioning correctly, periodic maintenance is necessary.

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