SM-3B205

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The SM-3B205 is a trimmer potentiometer designed for applications such as precision voltage regulation, electronic equipment, and tuning instruments. It features a linear taper and a low-profile, robust construction. This potentiometer has a resistance of 200 Ω, a maximum power rating of 0.5 W, and an operating temperature range of -40°C to +85°C. Its tolerances are rated at ±20%, and the terminal arrangement is 2-finger, top adjust.

Trimmer potentiometers are variable resistors used to control or adjust the level of a signal, usually in electronics and electrical equipment. They are miniature versions of the more common potentiometers used to adjust audio levels and are used to adjust gain, closed-loop control systems, filters, matching networks, tuning, and decibel levels. They can also be used to control motor speed in precision applications.

The working principle of trimmer potentiometers is fairly simple. They are similar to the principle of the resistive divider circuit. The wiper, or contact, is moved along the resistive element and the changing contact resistance causes a change in voltage that can be used to control a variety of signals. The resistive element is divided into linear, logarithmic and anti-logarithmic tapers to produce different voltage levels.

The SM-3B205 is designed with a linear taper, meaning that the voltage changes uniformly as the wiper moves across the resistive element. When the wiper is moved, it causes the resistance to vary between 0 and 200 Ω at a linear rate, producing an output voltage that increases or decreases linearly with the rotation of the wiper. This provides consistent readings and a reliable adjustment range.

Trimmer potentiometers are used in a variety of applications. In instrument tuning, they are used to adjust frequency or sensitivity settings. In closed-loop control systems, they are used to adjust the gain and lower limit of the feedback loop. Filters, matching networks, and decibel levels are also adjusted using trimmer potentiometers. The SM-3B205 is a robust, low-profile trimmer potentiometer designed for use in precision voltage regulation, electronic equipment, and instrument tuning. Its low resistance and high temperature range make it ideal for various applications.

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