Series:	ST42
Packaging:	Bulk
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Resistance:	200 Ohms
Power (Watts):	0.25W, 1/4W
Tolerance:	±20%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	1
Adjustment Type:	Top Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	J Lead
Size / Dimension:	Rectangular - 0.197" x 0.177" Face x 0.091" H (5.00mm x 4.50mm x 2.30mm)

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Trimmer Potentiometers

ST42EA201 Application Field and Working Principle

Trimmer potentiometers are essential components used in many electronic circuits, ranging from simple audio connections and amplifiers to complex regulator circuits. The ST42EA201 is a trimmer potentiometer designed specifically to provide precise control over the voltage and current in circuits. Its applications include audio amplifiers, video decoders, motor controllers, and power supplies. A trimmer potentiometer consists of a set of three terminals, usually labeled “A”, “B”, and “C”. Well-constructed potentiometers use a conductive metal-oxide surface which creates a more uniform electrical resistance. The resistance between the terminals is usually adjustable from 0 to 10Ohm. The basic working principle of a trimmer potentiometer is relatively simple. When the wiper is moved across the resistive layer, it is doing so in order to vary the resistance between terminals A and B. When this happens, the voltage between A and B will change accordingly. This principle is applied to the ST42EA201 in order to provide precise voltage regulation. As the wiper is moved across the resistive layer, it alters the resistance between A and B, in turn, altering the voltage between the two. The ST42EA201 is designed particularly for use in devices where high precision is required, such as motor speed controllers. Its features include low noise operation, low power consumption, and the ability to dissipate heat efficiently. It is also resistant to vibration, which makes it suitable for more demanding applications. Additionally, the ST42EA201 has a wide operating temperature range, from -40°C to +85°C. To incorporate the ST42EA201 in a circuit, the device must be grounded. The two poles of the device should be connected to the circuit’s power source in order to supply the appropriate voltage. The device should then be connected to the ground. It is important to note that the number of turns necessary to achieve maximum resistance for the device needs to be taken into account. This number of revolutions can be determined by consulting the manufacturer’s datasheet. The ST42EA201 is an effective and reliable trimmer potentiometer which may be used in a variety of electronic devices. Its simple, adjustable resistance makes it particularly suited for applications where precise voltage regulation is required. It is easy to use and features low power consumption and efficient heat dissipation, making it a good choice for more demanding tasks. Additionally, the wide temperature range means that the device can be used in a variety of climates. Overall, the ST42EA201 is a versatile and reliable trimmer potentiometer which is suitable for a variety of uses. Its simple design and adjustable resistance make it the perfect choice for applications requiring precise voltage and current regulation. Additionally, its low noise operation and efficient heat dissipation make it the ideal choice for more demanding tasks.

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Part Number	Manufacturer	Price	Quantity	Description