SM-42X204

Series:	SM4
Packaging:	Bulk
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Resistance:	200 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:	Rectangular - 0.189" x 0.138" Face x 0.201" H (4.80mm x 3.50mm x 5.10mm)

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SM-42X204 Trimmer Potentiometers Application Field and Working Principle

Trimmer potentiometers, marketed under different brand names such as SM-42X204, are miniature variable resistors with three or four limbs. These trimming devices are mainly used in manufacturing process to adjust the parameters of a product for efficiency and accuracy. The most common application of trimming potentiometers is for tuning and adjusting the onset of action of components within electronic and electromechanical circuits. A large variety of industries ranging from consumer electronics to vehicle systems products use trimming potentiometers so as to enhance the operating performance of a given device.

Working principle of trimmer potentiometers

Trimmer potentiometers are three-terminal components: two fixed contacts of resistor element, with one contact adjustable by means of a shaft, knob or screw. As the contact adjustment moves, the amount of resistance between the two fixed contacts is changed. When the size of resistance adjust varies, the current flow, voltage change, or frequency can be altered. Trimmer potentiometers typically use a resistive element consisting of a carbon composition, metal film, wirewound, and cermet (a mix of ceramic and metal particles). They are constructed in a variety of sizes, varied resistance range and a variety of power ratings. Trimmer potentiometers also come with two- and three-turn versions, allowing the user to make fine adjustments.

Circuitry of trimmer potentiometers

Trimmer potentiometers are used in a variety of circuit designs. Different types of mechanisms are implemented in order to adjust the resistor element within the device. This includes the use of a screw, gear, lever, diaphragm, or electrical contact. When trimmer potentiometers are used in an electrical circuit, the resistive element can be adjusted via the knob or screw. As the knob is turned, the resistive element is adjusted and the desired amount of resistance is delivered. Additionally, the resistance in the pot usually decreases when the knob or screw is turned clockwise and increases when the knob or screw is turned anticlockwise.

additional features and functions

Trimmer potentiometers also come with additional features for convenience and protection. These features may include different mounting options for easy installation, a soft-touch knob for added operational comfort, and/or a waterproof version with sealed components. Also, the potentiometers themselves may have built-in pullup resistors, protection diodes, and level shifters.

Conclusion

Trimmer potentiometers can provide a wide variety of adjustments to components in an electronic circuit. Their use is growing due to the fact that they are not only adjustable, but also cost-efficient and reliable. Therefore, SM-42X204 Trimmer Potentiometers are becoming increasingly popular in the electronics industry due to their versatile applications and features.

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