Some Type of Resistors


Much types of Resistors, is the most commonly used of all electronic components. There are different types of resistors are available with their primary function is to limit the current through the electrical circuit and to lower the voltage. Resistors are "Passive Components", which does not
contain a source of strength / reinforcement, but only weaken or reduce the signal voltage there are past them. When used in circuits generated DC Drop Voltage terminal was measured in both legs.

Resistor produces a voltage drop when an electric current flowing through it in accordance with Ohm's Law, with different values ​​on each of resistor produces different values ​​of currents or voltages. This is very useful in electronic circuitry to control or reduce both current and voltage generated after flowing through it.

There are different type of resistors and manufactured in various forms because of certain characteristics and accuracy in accordance with the specific application fields, such as the High Stability, High Voltage, High Current, etc., or used as general purpose resistors where their characteristics are less of a problem. Some common characteristics associated with low resistor such as; Temperature Coefficient, Coefficient Voltage, Noise, Frequency Response, Power and Temperature Rating, Physical Size and Reliability.

On all Electrical and Electronic Resistors circuit illustrated with a line that "zig-zag" with the inclusion of the value in units of Ohms, Ω.

1. Carbon Composition Resistors - Made from carbon powder for low power / small watts.

Carbon Resistors is the Composite Resistors that most common for use in the use of any electronic circuit common and is considered the most expensive resistors. It's resistive element is made from a mixture of carbon powder or carbon graphite (like pencil leads) with ceramic (clay). The ratio of carbon to determine the overall value of resistive ceramic mixture and the higher this ratio the lower the resistance value. The mixture is then formed into a cylindrical shape and metal wire / conductor attached to each end, to provide electrical connections before the outside is coated with insulating material and color-coded signs.

Carbon Composite Resistors have a low to medium power with a low inductance which makes it ideal for high frequency applications, but has a weakness at the level of noise (high noise) and less stable in hot conditions. Identification of carbon composite resistors are prefixed with "CR" (eg CR10kΩ) and is available in Path E6 (± 20% tolerance), Panorama of E12 (± 10% tolerance) and the Panorama of E24 (± 5% & ± 2% tolerance) resistor type generally it has a power of 0.125 or 1 / 4 Watt to 2 Watt.

2. Metal Film Resistors or cermets resistors - Made of conductive metal oxide paste, for very low power

"Film Resistors" consists of Metal Film, Carbon Film and Metal Oxide Films, which is typically made ​​by depositing a pure metal coating, such as nickel, or oxide films, such as tin-oxide, the ceramic insulator rods or substrate. Resistive value of resistor is lowered by the thickness of the film were then given a helical groove by using laser light. This raises the effect of increasing the resistance because the conductive layer or a helical cut in the same result by wrapping the wire in coil form. This manufacturing method allows for the resistors of this type has a higher accuracy than the Carbon Resistor.

Metal Film Resistors have a much better temperature stability than carbon resistors are equal in size the level of noise / low noise and generally better for high frequency or radio frequency applications. Metal Oxide Resistors better capability in high waves with a much higher temperature capability than equivalent metal film resistors. Other types of film resistors is commonly known as the Thick Film Resistors made by superimposing a thicker conductive paste of ceramic and metal, called cermet, the alumina ceramic substrate. Such resistors are used in the manufacture of small electronic circuits such as in the manufacture of PCBs for Calculator, mobile phones and computer peripherals devices la. Has a temperature stability, low noise, and the proper voltage. Metal Film Resistors begins with the notation "MFR" (eg MFR100kΩ) and CF for Carbon Film types. Metal film resistors are available in the trajectory E24 (± 5% & ± 2% tolerance), E96 (± 1% tolerance) and E192 (± 0.5%, ± 0.25% & ± 0.1% tolerance) with the power of 0, 05 (1 / 20) Watt up to 1 / 2 Watt. In general, precision film resistors are low power components.

3. Wire Wound Resistors - With a metallic body as a heat absorbers, have a very high value of watts

Other types of resistors, wire wound resistors are called, are made by winding a thin wire metal alloy (Nichrome) or wire type of to ceramic insulators in the form of a spiral helix that is similar to Film Resistors. Resistors of this type are generally only available Ohm very low with high precision (from 0.01 to 100kΩ). These resistors are widely used in the instrument gauges on a Whetstone bridge circuit. This resistor also able to handle the electrical current is much higher than others with Ohm resistor the same value with a power rating of more than 300 Watts. Resistors of this type are called "Chassis Mounted Resistors". They are designed to be physically mounted on a heatsink or metal plate to further remove the heat generated thereby enhancing the ability of a current greater.

Wire wound resistor of this type begins with the notation "WH" or "W" (for example; WH10Ω) and are available in packs Aluminum Cladded (WH) with accuracy (± 1%, ± 2%, ± 5% & ± 10% tolerance) or the vitreous Enamelled W package (± 1%, ± 2% & ± 5% tolerance) with 1W power up to 300W or more

4. Semiconductor Resistors - Resistors for working at high frequency and precision.

That's some type of resistors are widely used in everyday life, especially in the electronics field.