Resistors Specifications

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General Specifications

	Configuration:
	Your choices are...
	Single Resistor		Single resistors are standard, passive resistors with a single resistance value.
	Resistor Chip Array		Resistor chip arrays contain several resistors housed in a single package.
	Resistor, Capacitor (RC) Network		Resister, capacitor (RC) networks are integrated circuits (ICs) that contain resistor-capacitor arrays in a single chip.
	Resistor, Capacitor, Diode (RCD) Network		Resistor, capacitor, diode (RCD) networks are integrated circuits (ICs) that contain resistor-capacitor-diode arrays in a single chip.
	Other		Other unlisted, specialized, or proprietary configurations.
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	Category / Application
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	Automotive		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.
	Aerospace		Devices are designed for the aerospace industry. They may be used in satellites, sonar, or general avionics products.
	Audio / Video		Devices are designed for audio and/or video (AV) applications.
	Computers		Devices are designed for computers such as notebooks, laptops and tablets.
	Current Sensing Resistor		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.
	Dynamic Braking  Resistor		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.
	Fusible Resistor		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.
	General Use		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.
	Harmonic Filter Resistor		Harmonic filter resistors are used in power electronics and solid-state devices which generate harmonic voltages. They dissipate harmonic currents as heat.
	High-Current Resistor		High-current resistors are designed for high-current applications.
	High-Frequency Resistor		High-frequency resistors are designed for high-frequency applications.
	High-Voltage Resistor		High-voltage resistors are designed for high-voltage applications.
	Industrial		Industrial resistors are designed for heavy-duty, industrial applications.
	Medical		Medical resistors are used in medical equipment and systems.
	Motor Starting Resistor		Motor-starting resistors are used in motor-starting devices.
	Neutral Grounding Resistor		Neutral grounding resistors limit ground fault current to a low level. They are used to improve the safety of distribution systems.
	Precision Resistor		Precision resistors have a very-low temperature coefficient of resistance (TCR) and a very low tolerance value.
	Power Resistor		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).
	Railway Resistor		Railway resistors are used in railway applications.
	Surge Resistor		Surge resistors are designed to handle overload conditions in electrical and electronic circuits.
	Telecom Resistor		Telecom resistors are designed for telecommunications applications. They are used in telephones, mobile devices, two-way radios, and hand-held devices.
	Other		Other unlisted or proprietary resistor categories.
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	Technology / Construction
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	Carbon Composition		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.
	Carbon Film		Carbon-film resistors are relatively inexpensive and readily available. They have resistance values within ±10% or ±5% of their marked or nominal value.
	Cermet		Cermet devices are made of cermet, a composite that consists of ceramic and metallic materials. They are often used in high-temperature applications.
	Ceramic Composition		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.
	Coiled Wire Resistor		Coiled wire resistors are made by coiling wire on an insulated core.
	Edgewound Resistor		Edgewound resistors are made of high-power wire that is wound on edge to form a helical, resistive element.
	Grid Resistor		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.
	Metal Alloy		Metal-alloy resistors contain metallic elements. Varying these elements can alter the alloy's properties.
	Metal Film		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.
	Metal Foil		Resistors are made of metal foil.
	Metal Oxide		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.
	Ribbon Resistor		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.
	Tantalum		Resistors are made of tantalum, an element that is also used in capacitors. Tantalum resistors are used in audio applications.
	Thick Film		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.
	Thin Film		Thin-film resistors are formed by vapor-depositing a thin layer of resistive material onto a base. They are trimmed to a specific value by lasering or sandblasting.
	Wirewound Resistor		Wirewound resistors are made by winding thin wire onto a ceramic rod. Highly-accurate devices are used in multimeter, oscilloscopes and other measuring equipment. Wirewound resistors that can pass large currents without overheating are used in power supplies and other high-current circuits.
	Other		Other unlisted, specialized, or proprietary configurations.
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	Mounting / Packaging
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	Surface Mount (SMT / SMD)		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.
	Bolt-on (Chassis)		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.
	Panel Mount		Panel-mounted devices have a threaded bushing which surrounds the shaft.
	Through Hole		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.
	Axial Leads		Axial leads extend from the ends and along the axis of the resistor. They do not extend from the sides.
	Gull Wing Leads		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.
	J-leads		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.
	Radial Leads		Radial leads extend from the sides instead of from the ends.
	Screw Terminals		Terminals are designed for screw mounting on a circuit board.
	Tab Terminals		Terminals are designed for direct mounting on a circuit board.
	01005		The package dimensions are 0.016" × 0.008" (0.4 mm × 0.2 mm).
	0201		The package dimensions are 0.024" × 0.012" (0.6 mm × 0.3 mm).
	0402		The package dimensions are 0.04" × 0.02" (1.0 mm × 0.5 mm).
	0603		The package dimensions are 0.063" × 0.031" (1.6 mm × 0.8 mm).
	0805		The package dimensions are 0.08" × 0.05" (2.0 mm × 1.25 mm).
	1206		The package dimensions are 0.126" × 0.063" (3.2 mm × 1.6 mm).
	1625		The package dimensions are 0.16" × 0.25" (4.0 mm × 6.3 mm).
	1812		The package dimensions are 0.18" × 0.12" (4.6 mm × 3.0 mm).
	2010		The package dimensions are 0.197" × 0.098" (5.0 mm × 2.5 mm).
	2512		The package dimensions are 0.25" × 0.12" (6.3 mm × 3.0 mm).
	2525		The package dimensions are 0.25" × 0.25" (6.3 mm × 6.3 mm).
	3725		The package dimensions are 0.375" × 0.25" (9.5 mm × 6.3 mm).
	SOIC		Small outline integrated circuit (SOIC).
	SSOP		Shrink small outline package (SSOP).
	SC-70		SC-70 is one of the smallest available IC packages. It is used in cellular phones, PDAs, electronic games, laptops and other portable and hand-held applications where space is extremely limited.
	SOT23		SOT23 is a rectangular, surface-mounted, small-outline transistor (SOT) package with three or more gull wing leads. SOT23 features a very small footprint and is optimized for the highest possible current. Because of its low cost and low profile, SOT23 is used in home appliances, office and industrial equipment, personal computers, printers, and communication equipment.
	Other		Other unlisted, specialized, or proprietary configurations.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Performance Specifications

	Resistance Range		The device's resistance range.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Tolerance		Resistance tolerance is usually expressed as a percentage.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Temperature Coefficient (TCR)		Temperature coefficient of resistance (TCR) measures the rate at which the nominal resistance changes as a function of temperature. TCR is expressed in parts per million (ppm) per degree Celsius (C), or ppm/C.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Power Rating		Power rating is the maximum real power in watts (W) that the resistor supports.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Operating DC Voltage		The device's maximum operating direct current (DC) voltage.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Operating AC Voltage		The device's maximum operating alternating current (AC) voltage.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Number of Resistors		The total number of resistors in the package.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Operating Temperature		This is the full-required range of ambient operating temperature.
	Search Logic:		User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.

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Standards and Features

	Standard and Compliances
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	RoHS Compliant		Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polybrominated diphenyl ether.
	ELV Directive		End-of-Life Vehicles (ELV) is a European Union (EU) directive that requires manufacturers of automotive products sold in Europe to demonstrate that their products contain only minimal levels of mercury, cadmium and lead. Lead can still be used as an alloying additive in copper, steel and aluminum.
	UL		Underwriters Laboratories (UL) is a non-profit organization that tests components, systems, and materials according to its published standards for safety. Products that receive UL approval bear a UL Mark.
	CSA		Products that bear a CSA Mark have been tested by the Canadian Standards Association (CSA) and meet applicable standards for safety and/or performance. These standards are written and administered by organizations such as the American National Standards Institute (ANSI), Underwriters Laboratories (UL), and CSA International. CSA Marks may appear alone or with indicators. CSA Marks that appear alone are used with products certified primarily for the Canadian market, to the applicable Canadian standards. CSA Marks that appear with the indicators “C” and “US” or “NRTL/C” are used with products certified for both the U.S. and Canadian markets, to the applicable U.S. and Canadian standards.
	IEC		The International Electrotechnical Commission (IEC) is a global, non-profit organization that develops and maintains voluntary quality, safety, and performance standards for electrical materials, products, and systems The IEC also publishes standards for the electronics and telecommunications industries. The IEC’s membership consists of the electro technical standards organizations from each of its 51 member nations. The American National Standards Institute (ANSI) represents the United States.
	WEEE Compliant		Waste Electrical and Electronics Equipment (WEEE) is a European Union (EU) directive designed to encourage the reuse, recycling and recovery of electrical and electronic equipment. WEEE is also designed to improve the environmental impact and performance of this equipment. The WEEE directive establishes requirements and criteria for the collection, treatment, recycling and recovery of electrical and electronic equipment. It also makes producers responsible for financing these activities. Retailers and distributors must provide a way for consumers to return used or obsolete equipment without charge.
	Other		Other unlisted standards.
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	Features
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	Heat Sink		The device uses a heat sink to dissipate heat.
	Non-Inductive		The device is non-inductive.
	Air Cooled		The device is air cooled.
	Water Cooled		The device is water cooled.
	Non-Flame Coating		The device has a coating which provides protection against flames.
	Fireproof Case		The device is fireproof.
	Electrically Isolated Case		The device is covered by an electrically-isolated case.
	ESD Protection		The device is protected against electrostatic discharge (ESD).
	NEMA Enclosure		The device is encased in a NEMA enclosure. NEMA enclosures are rated by the National Electrical Manufacturers Association (NEMA) and designed for hazardous or non-hazardous locations and indoor or outdoor use.
	Military Standards		Devices comply with U.S. military standards.
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