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Device Type
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Your choices are...
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Attenuator Resistor
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Attenuator resistors reduce the power of a signal by a determined factor without distortion.
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Chip Resistor
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Chip resistors are passive resistors with a form factor of an integrated circuit (IC) chip.
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Fixed resistor
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Fixed resistors have a fixed resistance value.
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Load Bank
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Load banks are resistor systems that provide resistive electrical loads for testing purposes.
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Shunt Resistor
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Shunts resistors are connected in parallel with an instrument or component to divert electrical current. They provide an alternate path for current in case of failure.
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Variable Resistor / Potentiometer
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Variable resistors have a resistance value that can be adjusted or changed by the user. Potentiometers, trimmers, and rheostats are types of variable resistors.
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Voltage Divider
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Voltage dividers provide highly-accurate reference voltages for calibration and testing purposes. They produce an output voltage (Vout) which is proportional to an input voltage (Vin). Voltage dividers consist of a series of fixed resistors (R1 and R2) that function as a highly accurate, variable potentiometer. Kelvin-Varley voltage dividers use a bridge circuit with two standard-value resistors. The ratio of the resistance value determines the voltage or current ratio.
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Other
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Other unspecified resistors. Examples include photoresistors, thermistors, varistors, and sensistors.
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Configuration:
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Your choices are...
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Single Resistor
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Single resistors are standard, passive resistors with a single resistance value.
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Resistor Array
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Resistor chip arrays contain several resistors housed in a single package.
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Other
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Other unlisted, specialized, or proprietary configurations.
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Category / Application
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Your choices are...
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Automotive
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Devices are designed for the automotive industry. They may be used in anti-lock brakes or control systems, and in power train, power steering, or engine control applications.
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Aerospace
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Devices are designed for the aerospace industry. They may be used in satellites, sonar, or general avionics products.
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Audio / Video
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Devices are designed for audio and/or video (AV) applications.
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Computers
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Devices are designed for computers such as notebooks, laptops and tablets.
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Current Sensing Resistor
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Current sensing resistors convert flow-through current to a voltage drop. By monitoring or measuring the voltage drop, current flowing through the resistor can be measured. Typically, current sensing resistors are used to monitor current in products such as power supplies, receptacles, and battery packs.
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Dynamic Braking Resistor
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Dynamic braking resistors (DBR) produce braking torque and absorb the high amounts of energy generated by stopping electric motors. They are used in variable-speed drive systems such as elevators, cranes, and trains. When a system load is decelerated, the kinetic energy is converted into electrical energy. The dynamic braking resistor absorbs this energy and converts it to heat.
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Fusible Resistor
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Fusible resistors are made of a partially-organic film. The flow of high-current melts the film, opening the circuit and stopping the flow of current through the resistor.
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General Use
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General-use devices can be used in most applications. They are often used in consumer products, computers or disk drives, and to provide over-current protection.
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Harmonic Filter Resistor
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Harmonic filter resistors are used in power electronics and solid-state devices which generate harmonic voltages. They dissipate harmonic currents as heat.
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High Current Resistor
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High-current resistors are designed for high-current applications.
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High Frequency Resistor
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High-frequency resistors are designed for high-frequency applications.
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High Voltage Resistor
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High-voltage resistors are designed for high-voltage applications.
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Industrial
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Industrial resistors are designed for heavy-duty, industrial applications.
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Medical
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Medical resistors are used in medical equipment and systems.
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Motor Starting Resistor
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Motor-starting resistors are used in motor-starting devices.
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Neutral Grounding Resistor
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Neutral grounding resistors limit ground fault current to a low level. They are used to improve the safety of distribution systems.
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Precision Resistor
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Precision resistors have a very-low temperature coefficient of resistance (TCR) and a very low tolerance value.
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Power Resistor
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Power resistors are designed for high-power applications. They are used in the automotive industry, control systems, and power generation and distribution applications. Power resistors include load banks, grounding resistors, and dynamic braking resistors (DBR).
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Railway Resistor
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Railway resistors are used in railway applications.
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Surge Resistor
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Surge resistors are designed to handle overload conditions in electrical and electronic circuits.
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Telecom Resistor
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Telecom resistors are designed for telecommunications applications. They are used in telephones, mobile devices, two-way radios, and hand-held devices.
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Other
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Other unlisted or proprietary resistor categories.
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Technology / Construction
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Carbon Composition
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Carbon-composition resistors consist of powdered carbon, an insulating material, and a resin binder. Their resistance value is determined by the ratio of powdered carbon to insulating material. Carbon-composition resistors usually have a precision of no greater than +/-5%. This means that a 100-ohm resistor can range from 95 to 105 ohms in actual value.
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Carbon Film
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Carbon-film resistors are relatively inexpensive and readily available. They have resistance values within ±10% or ±5% of their marked or nominal value.
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Cermet
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Cermet devices are made of cermet, a composite that consists of ceramic and metallic materials. They are often used in high-temperature applications.
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Ceramic Composition
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Ceramic-composition resistors are solid-body devices made of a high-temperature, ceramic resistive material. They have bonded metal contacts. The construction of ceramic-composition resistors concentrates nearly all of the component mass into the resistive element, resulting in a rugged device with high-energy capacity.
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Coiled Wire Resistor
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Coiled wire resistors are made by coiling wire on an insulated core.
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Edgewound Resistor
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Edgewound resistors are made of high-power wire that is wound on edge to form a helical, resistive element.
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Grid Resistor
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Grid resistors consist of high-power wire that is formed into grid. Several grids are then fitted into an enclosure. Grid resistors can withstand both high power and high current.
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Metal Alloy
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Metal-alloy resistors contain metallic elements. Varying these elements can alter the alloy's properties.
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Metal Film
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Metal-film resistors are produced by depositing a resistive element on a high-grade, ceramic rod. The metal film’s resistive element may be carbon, nickel chromium; or a mixture of metal and glass, or metal and metal oxide. The precise resistance is achieved by removing part of the metal film in a spiral pattern around the rod. Typically, the tolerance is within ±2% or ±1% of the nominal value. When a tolerance of +/-1% is achieved, a 100-ohm, 1% resistor falls in the range of 99 to 101 ohms.
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Metal Foil
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Resistors are made of metal foil.
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Metal Oxide
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Metal-oxide resistors are similar to metal-film resistors. Although there are some differences between these resistor types, none affect their use in simple circuits.
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Ribbon Resistor
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Ribbon resistors are power resistors made with metallic, ribbon-like elements. These ribbon elements are formed by folding a strip of metal back and forth.
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Tantalum
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Resistors are made of tantalum, an element that is also used in capacitors. Tantalum resistors are used in audio applications.
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Thick Film
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Thick-film resistors are made by stenciling a resistive metallic paste or ink onto a base in a process similar to silk screening. Usually, this resistive material is considered to be proprietary.
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Thin Film
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Thin-film resistors are formed by vapor-deposition of a thin layer of resistive material onto a base. They are trimmed to a specific value by lasering or sandblasting.
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Wirewound Resistor
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Wirewound resistors are made by winding thin wire onto a ceramic rod. Highly-accurate devices are used in multimeters, oscilloscopes and other measuring equipment. Wirewound resistors that can pass large currents without overheating are used in power supplies and other high-current circuits.
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Other
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Other unlisted, specialized, or proprietary configurations.
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Mounting / Packaging
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Your choices are...
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Surface Mount (SMT / SMD)
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Surface mount technology (SMT) adds components to a printed circuit board (PCB) by soldering component leads or terminals to the top surface of the board. SMT devices (SMD) have a flat surface that is soldered to a flat pad on the face of the PCB. Typically, the PCB pad is coated with a paste-like formulation of solder and flux. With careful placement, SMT components on solder paste remain in position until elevated temperatures, usually from an infrared oven, melt the paste and solder the component leads to the PCB pads.
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Bolt-on (Chassis)
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Chassis mounted devices bolt onto or within a structure’s supporting frame, typically in a metal-to-metal configuration for better heat dissipation. Some chassis types are designed to be mounted within a rack.
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Panel Mount
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Panel-mounted devices have a threaded bushing which surrounds the shaft.
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Through Hole
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Through hole technology (THT) mounts components on a printed circuit board (PCB) by inserting component leads through holes in the board and then soldering the leads in place on the opposite side of the board.
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Axial Leads
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Axial leads extend from the ends and along the axis of the resistor. They do not extend from the sides.
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Gull Wing Leads
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Gull-wing leads are used widely because they are relatively inexpensive to mold and form. Gull wings are flexible and can withstand thermal expansion and contraction. It is easy to inspect the integrity of gull-wing leads to circuit-board solder connections.
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J-leads
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J-leads are popular because they use less PCB real estate than gull wing leads; however, the J-lead to board solder connections are hidden from inspection and the leads are more difficult to form.
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Radial Leads
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Radial leads extend from the sides instead of from the ends.
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Screw Terminals
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Terminals are designed for screw mounting on a circuit board.
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Tab Terminals
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Terminals are designed for direct mounting on a circuit board.
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Other
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Other unlisted, specialized, or proprietary configurations.
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