Capacitors Blog

The upper model represents a stereo potentiometer. These are actually two pots in one casing, with sliders mounted on shared axis, so they move simultaneously. These are used in stereophonic amps for simultaneous regulation of both left and right channels, etc.

Lower left is the so called slider potentiometer.

Lower right is a wire-wound pot with a wattage of 20W, commonly used as rheostat (for regulating current while charging a battery etc).

For circuits that demand very accurate voltage and current values, trimmer potentiometers (or just trim pots) are used. These are small potentiometers with a slider that is adjusted via a screwdriver.

Previous blog we talk about Potentiometers by means of construction, they can be divided into 2 groups: coated and wire-wound. Now let us to to know more related details of it.

With coated potentiometers, (as shown follow figure), insulator body is coated with a resistive material. There is a conductive slider moving across the resistive layer, increasing the resistance between slider and one end of pot, while decreasing the resistance between slider and the other end of pot.

Wire-wound potentiometers are made of conductor wire coiled around insulator body.  There is a slider moving across the wire, increasing the resistance between slider and one end of pot, while decreasing the resistance between slider and the other end of pot. Wire-wound potentiometers are used in devices which require more accuracy in control. They feature higher dissipation than coated pots, and are therefore in high current circuits. Construction of a wire-wound circular potentiometer (as shown follow figure). The resistive element (1) of the shown device is trapezoidal, giving a non-linear relationship between resistance and turn angle. The wiper (3) rotates with the axis (4), providing the changeable resistance between the wiper contact (6) and the fixed contacts (5) and (9). The vertical position of the axis is fixed in the body (2) with the ring (7) (below) and the bolt (8) (above).

Coated pots are much more common. With these, resistance can be linear, logarithmic, inverse-logarithmic or other, depending upon the angle or position of the slider. Most common are linear and logarithmic potentiometers, and the most common applications are radio-receivers, audio amplifiers, and similar devices where pots are used for adjusting the volume, tone, balance, etc..

Potentiometer (or pot, as it is more commonly known) is a simple electro-mechanical transducer used as a voltage divider. It converts rotary or linear motion from the operator into a change of resistance, and this change is (or can be) used to control anything from the volume of a hi-fi system to the direction of a huge container ship as voltage or current regulators in electronic circuits. By means of construction, they can be divided into 2 groups: coated and wire-wound.

Trimming Potentiometers is used by more and more products, its application including satellite receivers, modems, LCD displays, set-top boxes, and meters and instruments, as well as entertainment devices, such as cameras, and MP3 players.

Below is Suntan Trimming Potentiometers - TSR-3318 characteristics.

Suntan offer full kinds of Trimming Potentiometer as below. Please check http: / / http://www.suntan.com.hk/Trimming-Potentiometers/ for data sheet freely.

TSR-3006 - Rectangular Trimming Potentiometer
TSR-3323 - 4 Terminal Square Trimming Potentiometer
TSR-3296 - 5 Terminal Square Trimming Potentiometer
TSR-3362 - 7 Terminal Square Trimming Potentiometer
TSR-3386 - 8 Terminal Square Trimming Potentiometer
TSR-3329 - Circularity Trimming Potentiometer
TSR-3266 - 5 Terminal Square Trimming Potentiometer
TSR-3318 - 6mm Phenolic Round Trimming Potentiometer
TSR-3306 - 6mm Cermet Round Trimming Potentiometer
TSR-3309 - 9mm Round Trimming Potentiometer
TSR-065 - Phenolic Trimming Potentiometer
TSR-3590 - Precision Multiturn Wirewound Potentiometer
TSR-105H - 6 Terminal Trimming Potentiometer
Delivery: 2 weeks
Packing information: 50pcs/ tube
MOQ: 500 pcs

Suntan Technology Company Limited
----All Kinds of Capacitors

Ceramic Trimmer Potentiometer Features

1. 6mm Round/ Single-Turn/ Cermet Industrial/ Open Frame
2. Cross slot adjustment options
3. Horiontal andvertical mounting styles
4. Dust resistant/ splash resistant covers
5. PC board stand-offs and retention feature
6. Front and top adjust styles

Ceramic Trimmer Potentiometer Electrical Characteristics

1. Standard Resistance Range 100Ω to 1meg ohm
2. Resistance Tolerance ±20% (TK±25%)
3. Adjustment Angle 240°C ± 20°C
4. Residual Resistance ≤500Ω, 10Ω>500Ω, 2% 

Ceramic Trimmer Potentiometer Pictures

Circularity Trimming Potentiometers Features

1. (Single Turn/ Cermet/ Industrial/ Sealed)
2. (5 Terminal S tyles)

Circularity Trimming Potentiometers Electrical Characteristics

• Standard Resistance Range 50Ω - 2MΩ
• Resistance Tolerance ±5%, ±10%
• Absolute Minimum Resistance ≤1% R or 2Ω
• Contact Resistance Variation CRV≤3%or 3Ω
• Insulation Resistance R1≥1GΩ(100Vac)
• Withstand Voltage 500Vac
• Effective Travel 280°

Circularity Trimming Potentiometers Pictures

Round Trimming Potentiometers Features

1. (Single Turn/ Cermet/ Industrial)
2. (2 Terminal S tyles)

Round Trimming Potentiometers Electrical Characteristics

• Standard Resistance Range 10Ω - 2MΩ
• Resistance Tolerance ±30% std
• Absolute Minimum Resistance 1% max (≤2K=30Ω)
• Contact Resistance Variation 3% max
• Resistance Essentially infinite
• Adjustment Angle 235° nom

Round Trimming Potentiometers Contact

• Fax #: 852 8208 6246
• Email : info@suntan.com.hk

Rectangular Trimming Potentiometers Features

1. (Multiturn/ Cermet/ Industrial/ Sealed)
2. (3 Terminal Styles)

Rectangular Trimming Potentiometers Parameters download PDF files