Ferrite Beads Specifications

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General Specifications

	Technology
	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.
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	Bead Form Factor
	Your choices are...
	Rod		The bead is in the shape of cylindrical rod.
	Bead on Leads		The bead has radial leads.
	Bar		The bead is in the shape of a bar.
	Plate		The bead is in the shape of a thin plate.
	Tube		The bead is in the shape of hollowed tube.
	Chip		The bead is built in a chip using semiconductor materials.
	Other		Other unlisted, specialized or proprietary bead form factors.
	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
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	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.

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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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Performance

	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.
	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.
	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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