39255K

Series:	392
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Not For New Designs
Moisture Sensitivity Level (MSL):	--
Resistance:	5 kOhms
Power (Watts):	0.5W, 1/2W
Tolerance:	±10%
Temperature Coefficient:	--
Number of Turns:	1
Adjustment Type:	Top Adjustment
Resistive Material:	Conductive Plastic
Mounting Type:	Through Hole
Termination Style:	PC Pins
Size / Dimension:	Round - 0.513" Dia x 0.469" H (13.03mm x 11.91mm)

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Trimmer Potentiometers

Trimmer Potentiometers, or simply trimmers, are electrically adjustable resistors used to control levels of current, voltage or other electrical signals. They are typically small, discreet components, as broad as most through-hole or surface mount parts used in circuits today.Trimmer Potentiometers are mechanical control devices which allow sub-circuit adjustments and other tweaks. They are found in ultimate integrated circuits (ICs), typically used to fine-tune a circuit operation in wide frequency ranges. An example is in the construction of voltage amplifiers, where the potentiometer allows for correct matching of the output current to the input voltage.A 39255K trimmer is an example of a potentiometer with a wide application field and lots of potential in a range of industries. This particular model is a 15-turn miniature trimmer, which is made up of a single, circular profile bearing a central variable resistor integrated onto a switch, and which is soldered directly onto the circuit board in the closed loop topology. This trimmer is available for surface mounting, with miniaturized dimensions and tolerances that provide for very precise and exact adjustments.The 39255K trimmer is designed for a variety of applications, including digital equipment, low-frequency current control, and signal processing. It offers exceptional performance parameters and excellent repeatability and precision that exceed expectations. The trimmer’s working principle involves allowing the tracks to direct current, usually in the order of 0.1 micron, to make very small increments when responding to different signals. These electrical signals can cause the circuit voltages to vary and a potentiometer can fine-tune these adjustments by varying the flow of electric current to the circuit. The 36255K trimmer’s adjustable resistance principle is based on the linear relationship between the adjusting knob, resistor-disc and resistor track. When the knob is turned, the contact at the center slides down the track, and when the knob is released it snaps back to its original position due to the spring preload. The result is that for a given voltage, current flow is adjusted by providing a different resistance value which helps to bring the voltage back into balance. The use of the potentiometer in combination with external keypad keys can be used to adjust digital remote control circuits, or to adjust the brightness of an LED circuit. Similarly, it can also be used to adjust the output voltage regulation in switching power supplies, as well as for voltage regulation in digital modulation and phase-locked loop circuits. Overall, the 39255K trimmer is a convenient and powerful tool for use in a host of circuit-testing activities. It’s compact size means it can fit conveniently into any small circuit, and offers the user a great deal of flexibility for fine tuning to achieve the desired result. With its excellent performance parameters and wide application field, it can indeed make a major contribution to any circuit design.

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