SM31B104

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Trimmer potentiometers are among the most common components in electronics and electric equipment. The SM31B104 is a popular trimmer potentiometer used in a variety of applications. It features a low profile design with a small footprint, making it ideal for space-constrained electronic and electric equipment designs.

The SM31B104 is a two terminal, miniature adjustable trimmer, and is available in various sizes ranging from 9.6mm to 11.96mm with a height of 8.5mm. It has a low profile design that enables access from both sides. It is tolerant to temperatures from -55°C to +125°C and performs with a minimum of 250 mA and a maximum of 2A. The SM31B104 is available with resistances of 10KΩ, 20KΩ, 50KΩ, 100KΩ, 250KΩ, 500KΩ, and 1MΩ.

The SM31B104 trimmer potentiometer is a three-terminal device that consists of two fixed outer terminals, one being an insulated end, and one adjustable center terminal. The center terminal is attached to a rotatable resistance element which can be adjusted by inserting a tool into an access hole through the case bottom. This allows for precise and repeatable adjustments.

The SM31B104 is primarily used for frequency adjustment in oscillators, accuracy adjustment for instruments, and balance control in A/V equipment. It can also be used to adjust and set any parameter that has an analog control such as brightness and contrast in television sets, volume control in sound systems, stereo width in equalizers, or any other type of parameter that requires adjustment.

The working principle of the SM31B104 trimmer potentiometer is based on the resistive element that provides the device with its adjustable resistance values. The internal mechanism of the trimmer is composed of the resistive element and two fixed outer terminals. The center terminal is connected to a disk-shaped resistive element and is adjusted when the device is connected to an external circuit, either by manually turning the center terminal or by using a tool inserted into the access hole on the bottom of the case. When the center terminal is turned, the resistance value between the fixed outer terminals is changed.

The SM31B104 trimmer potentiometer is one of the most useful and versatile components available in modern day electronic and electric equipment. Its ability to adjust a wide range of parameters makes it an indispensable tool for designers and technicians. With its low profile design and small footprint, the SM31B104 is the perfect choice for applications requiring precise adjustment over a wide range of resistance.

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