SM-42W103

Series:	SM4
Packaging:	Bulk
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Resistance:	10 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:	J Lead
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-42W103 Trimmer Potentiometers

Trimmer potentiometers, or trimpots, are adjustable electrical components used as a part of an electrical circuit. This type of potentiometer typically consists of a single-turn continuous-rotation rotary shaft, which is adjustable with a screwdriver or other suitable tool and is eye-visible for setting and adjusting the resistance across the two terminal contacts. The SM-42W103 is a type of trimmer potentiometer from the SM series and designed for high dielectric strength and low contact resistance.

Construction

The SM-42W103 trimmer potentiometer is a small sealed rotary device with a one-turn continuous-rotation shaft and flat-shaped bearing. The rotary shaft is constructed from stainless steel, which makes it highly durable and resistant to corrosion. The trimpot has 3 terminals: a wiper contact, which is connected to the rotary shaft, and two output contacts, which are connected to the two external terminals on the side of the device.

Operation

The operation of the SM-42W103 is relatively simple. When the rotary shaft is turned, the wiper contact moves across a circular track composed of copper traces. The resistance between the two output contacts is dependent on the position of the wiper contact and changes according to the rotation of the rotary shaft. The wiper contact also creates a variable voltage divider, which produces a voltage signal with a magnitude dependent on the position of the wiper contact.

Application

The SM-42W103 trimmer potentiometer is primarily used in applications requiring an adjustable voltage divider, such as adjustable gain amplifiers and filter circuits. It can also be used in frequency-selective circuits, such as band-pass filters, and in switches, attenuators, and other signal-processing circuits. In addition, the SM-42W103 is particularly well-suited for use in automotive and industrial electronics circuits due to its superior dielectric strength and low contact resistance.

Advantages

The SM-42W103 trimmer potentiometer is a unique and highly versatile adjustable electrical component that provides a range of useful and advantageous features. Most notably, the device is sealed to IP67 standards and provides excellent protection against dust, water, and contaminants, making it suitable for use in a variety of harsh environmental conditions. Additionally, the trimmer has a robust construction and is designed to withstand high levels of vibration and shock. The SM-42W103 is also low-power, which makes it ideal for battery-powered applications. Finally, it has a positive locking feature, which ensures that the settings remain secure even after exposure to high levels of shock or vibration.

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