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Mounting Style:

Inductance Type:

Technology / Configuration:

RoHS Compliant?

WEEE Compliant?

Core Material:

Inductance Range:

Inductance Tolerance:

(+/- %)

DCR:

Rated DC Current:

Quality Factor (Q):

SRF:

Operating Temperature:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Impedance Range:

Impedance Tolerance:

(+/- %)

Testing Frequency:

Applications:

Lead Type:

Packing Method:

Molded Case?

Shielded?

Help with Inductors, Coils, and Chokes specifications:

General Specifications
   Mounting Style       
   Your choices are...         
   Through Hole Technology (THT)       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. 
   Surface Mount Technology (SMT)       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 components 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.   Industry-standard pick-and-place equipment can mount SMT components quickly, accurately, and cost-effectively. SMT is a widely used alternative to mounting processes that insert pins or terminals through holes and solder leads into place on the opposite side of the board. 
   Chassis Mount       Chassis mounted devices bolt onto a chassis, typically in a metal-to-metal configuration for better heat dissipation.  
   Other       Other unlisted mounting styles. 
   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.
   Inductance Type       
   Your choices are...         
   Fixed       The product's inductance is a fixed value which a user cannot change. 
   Variable       The product's inductance is a variable value which a user can change. 
   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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Technology / Configuration
           
   Your choices are...         
   Solenoidal (Standard) Core       Solenoidal cores or standard cores are rod-shaped. 
   Toroidal       Toroidal inductors resemble doughnuts and differ in terms of diameter, thickness, permeability and type. They have a high inductance for the occupied physical space. 
   Bobbin Core       Bobbin cores are shaped like a bobbin or spool. Inductors that use bobbin cores are available with or without leads and come in both axial and radial forms. 
   Wirewound       Wirewound inductors have cores made of wound wires. 
   Multilayer       Multilayer inductors are made by layering the coil between multiple layers of core material. Normally, the coil consists of a bare-metal material (no insulation). This technology is sometimes referred to as "non-wirewound". With multilayer inductors, the inductance value can be increased by adding additional layers to create a spiral pattern. 
   Laminated       Laminated inductors or ferrite beads have a core that is made by stacking laminations on top of each other. Laminations are made from different materials and differ in terms of thickness. 
   Other       Other unlisted, specialized, or proprietary types or technologies. 
   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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Standards and Certifications
   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. RoHS will become effective on July 1, 2006. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   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 seeks to improve the environmental impact and performance of such equipment, and establishes requirements and criteria for collection, treatment, recycling and recovery. In addition, WEEE makes producers responsible for financing such activities. For their part, retailers and distributors must provide a way for consumers to return used or obsolete equipment without charge. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Core Material
   Core Material      Coils are wound on various materials and assembled into different shapes. The most popular materials are iron (e.g., iron alloys, laminations, or powder) and ferrite, a black, nonconductive, brittle magnetic material. Products are designed to multiply the inductance of a given coil by the "permeability" of the core material.
   Your choices are...         
   Air       The inductor does not have a material core. 
   Ceramic       Ceramic cores provide a form for the coil. In some designs, they also create a structure to hold the terminals in place. Because ceramics lack magnetic properties, ceramic cores do not increase permeability. Ceramics also have a very low thermal coefficient of expansion, which allows for relatively high inductance-stability over a range of operating temperatures. 
   Ferrite       Ferrite is a magnetic material that consists of a mixed oxide of iron and other elements with a crystalline molecular structure. 
   Phenolic       Phenolic cores have a polyester base and good high-temperature characteristics. Products typically have a high flammability rating such as UL94V-0 and provide high strength. Phenolic cores are more economical than ceramic cores.  
   Iron       The core material is iron. 
   Powdered Iron       Powdered iron is a magnetic material with an inherent, distributed air gap that allows the core to store higher levels of magnetic flux, permitting a higher level of direct current (DC) to flow through the inductor before saturation occurs. Powdered iron cores are made of nearly 100% iron. 
   Nickel - Iron       Cores are a combination of iron and nickel. 
   MPP       Molypermalloy powder (MPP) is a magnetic material with an inherent, distributed air gap that allows the core to store higher levels of magnetic flux, permitting a higher level of direct current (DC) to flow through the inductor before saturation occurs. The basic materials of MPP are nickel (80%), molybdenum (2% to 3%), and iron (17% to 18%). 
   Other       Other unlisted, specialized, or proprietary core materials. 
   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
   Inductance Range       Inductance range is the range of inductance, the property of a circuit element to oppose any change in the flow-through of current. Inductance is influenced by an inductor's core material, shape and size. The turn count and shape of the coil are also important factors. The unit of inductance is the Henry (H). 
   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.
   Inductance Tolerance       Inductance tolerance is the allowed amount of variation from the nominal value as specified by the manufacturer. 
   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.
   DCR       Direct current resistance (DCR) is the resistance of the inductor winding as measured using DC current. DCR is usually minimized in the design of an inductor, and specified as a maximum rating. 
   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.
   Rated DC Current       The rated DC current (DC) is the level of continuous direct-current that can be passed through the inductor without damage. The DC-current level is based on a maximum temperature-rise at the maximum-rated ambient temperature. The rated current is related to the inductor's ability to minimize power losses in the winding by having a low DC resistance.  For low-frequency currents, the RMS current can be substituted for the DC-rated current. 
   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.
   Quality Factor (Q)       An inductor’s quality factor or Q-value is a measure of the relative losses in the inductor. Q-value is defined as the ratio of inductive reactance to the effective resistance, or XL/Re. Since both XL and Re are functions of frequency, the test frequency must be given when specifying Q. At the self-resonant frequency (SRF), Q is zero because the inductance is zero. 
   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.
   SRF       Self resonant frequency (SRF) is the frequency at which an inductor's distributed capacitance resonates with its inductance. Because inductance equals capacitance, the values cancel each other out. An inductor at SRF acts as a purely resistive high-impedance element and has a Q-value of zero. 
   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.
   Impedance Range       Impedance is the total resistance to the flow of current, and includes both alternating current (AC) and direct current (DC). The DC component is the DC resistance of the device. The AC component includes the inductor reactance. 
   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.
   Impedance Tolerance       Impedance tolerance is the allowed amount of variation from the nominal value as specified by the manufacturer. 
   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.
   Testing Frequency       Testing frequency is the frequency at which inductors are tested for impedance, inductance, and/or quality factor. 
   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.
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Applications
   Applications       
   Your choices are...         
   Common-Mode Choke       Common-mode chokes are used to protect power-supply lines from electromagnetic interference (EMI) and radio frequency interference (RFI). They are also used to keep electronic equipment from malfunctioning. 
   General Purpose       General-purpose inductors can be used for many different applications. 
   High Current       High-current inductors can withstand high currents. 
   High Frequency       High-frequency inductors are designed for high-frequency applications. 
   Power Inductor       Power inductors are designed for high-power applications. 
   RF Inductor / Choke       RF chokes operate in the radio frequency (RF) spectrum and are designed to filter or "choke out" signals. 
   Other       Other unlisted applications. 
   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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More Specs
   Lead Type       
   Your choices are...         
   Axial Leads       The inductor has a core with concentric leads on opposite sides. The leads exit the core's ends and run along its axis instead of coming out from the side. 
   Radial Leads       The inductor has a core with leads that exit from the same side of the inductor body for mounting in the same plane. 
   Flying Leads       Flying leads project horizontally. 
   No Leads (SMT)       The inductor does not have leads, but instead uses surface mount technology (SMT). 
   Tab Leads       Tab leads are terminals designed for direct mounting into a circuit-board socket. 
   Gull-Wing Leads       Gull-wing leads are relatively inexpensive to mold and form. These popular leads are also flexible enough to withstand thermal expansion and contraction. Operators can easily inspect the integrity of a gull-wing lead in a circuit-board socket connection. 
   J-Leads       J-leads use less circuit-board space than gull-wing leads; however, J-leads in board solder-connections are relatively difficult to inspect. J-leads are also more difficult to form. 
   Other       Other unlisted, specialized or proprietary leads. 
   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.
   Packing Method       
   Your choices are...         
   Tape Reel       Components are packed in tape reel assemblies that include a carrier tape with embossed cavities for storing individual components. A cover tape seals the carrier tape in place. This composite tape is then wound on a reel that is placed in a corrugated shipping box for transport and delivery. Customers unpack the reels and load them into industry-standard, pick-and-place board assembly equipment. Tape and reel assemblies provide component isolation and are designed for surface mount packages such as quad flat package (QFP) and thin quad flat package (TQFP).   Typically, carrier tape is made from a polystyrene (PS) or PS-laminate film with a uniform film thickness between 0.2 mm to 0.4 mm. Carrier tape design is defined largely by component length, width, and thickness. Cover tape is made from a polyethylene teraphthalate (PET) film or film laminate with an adhesive applied to the underside of the film. This adhesive is usually heat and pressure sensitive to ensure a positive, consistent seal between the carrier tape and the cover tape. The reels that contain the composite tape are typically made of polystyrene and have one, two, or three parts. Reel dimensions meet EIA-481-1, EIA-481-2, and EIA-481-3 standards. 
   Tray / Rail       Components are packed in trays (rails) that are made of carbon-powder or fiber materials and molded into rectangular outlines that contain matrices of uniformly spaced pockets. These containers protect components during shipping and provide proper component location and orientation for use with industry-standard, pick-and-place board assembly equipment. Trays are designed for components for that have leads on four sides and that require component lead isolation during shipping, handling, or processing. For example, quad flat package (QFP) and thin quad flat package (TQFP) components are often shipped in trays. To facilitate shipping and handling, trays are stacked and bound together in standard configurations. To provide rigidity, an empty cover tray is added to the top of the load. Typical stacking configurations consist of five full trays and one cover tray, and ten full trays and one cover tray. Customer requirements determine whether trays are shipped in single or multiple stacks. 
   Shipping Tube / Stick Magazine       Components are packed in shipping tubes or stick magazines that are made of rigid polyvinylchloride (PVC) and extruded in industry-standard sizes. These containers protect components during shipping and provide proper component location and orientation for use with industry-standard, pick-and-place board assembly equipment.  To facilitate shipping and handling, shipping tubes and stick magazines are usually loaded into intermediate containers such as boxes or bags to form standard quantities. Intermediate-level packing quantities for shipping tubes and stick magazines often vary by pin count and package type. 
   Bulk Pack       Components are distributed as individual parts. 
   Other       Other unlisted packing methods. 
   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.
   Molded Case       The inductor's case is formed with a moding process. Common molding processes include injection molding and transfer molding. Typically, molded inductors have well-defined body dimensions that consist of smooth surfaces and sharper corners than other case types. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Shielded       The core of a shielded inductor contains most of the magnetic field. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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