ST42ETA102

Series:	ST42
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Resistance:	1 kOhms
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:	Square - 0.197" L x 0.177" W x 0.091" H (5.00mm x 4.50mm x 2.30mm)

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Trimmer Potentiometers

Trimmer potentiometers, such as the ST42ETA102, are resistive electrical components designed for accurate volume control, impedance matching and calibration. The ST42ETA102 is a single-turn trimmer potentiometer with an operating temperature range of -25°C to 95°C, and an overall height of 6mm.

Applications

Trimmer potentiometers have many applications, including as a fine-tuning control component within a larger electronic assembly. A common use is in balancing and tuning the frequency of an amplifier circuit. This includes controlling the amplifier gain, the output sound level and the feedback loop. The ST42ETA102 is also commonly used in laboratory and automation settings as a control component for testing and measuring equipment, including test benches and calibration systems. Additionally, dial-type thermometers and other precision devices often incorporate trimmer potentiometers to help calibrate its analog readout.

Working Principle

Trimmer potentiometers generally use a variable resistor as a way of adjusting the resistance of the component. The ST42ETA102 does this with a full-bodied rotary element that is adjusted using a screw or a rotation knob. As the knob is turned in either direction, the resistance of the element is changed, allowing the user to adjust the component accordingly. The majority of trimmer potentiometers are adjustable—meaning, the knob can be rotated infinitely in either direction—whereas the ST42ETA102 is limited to a single turn, meaning, 360-degree rotation of the knob is equivalent to a full adjustment.

Versatility and Other Features

Trimmer potentiometers such as the ST42ETA102 are designed to be versatile, easy to assemble and easy to adjust. Specifically, the ST42ETA102 features an environmental rubber seal that provides high sealing performance, and a long-life which withstands temperature cycling and prolonged moisture exposure. Other features include excellent electrical characteristics, low-torque performance, and a high electrical reliability. In conclusion, the ST42ETA102 is an adjustable trimmer potentiometer designed for accurate frequency control and calibration. It features excellent electrical characteristics, superior environmental sealing performance and long-life operation. With its easy assembly and adjustability, the ST42ETA102 offers the perfect solution for any device requiring precision tuning or calibration.

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