Ferrite Cores

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	Core Type	Supplier Device Package	Material	Diameter	Inductance Factor (Al)	Tolerance	Gap	Initial Permeability (µi)	Core Factor (ΣI/A) mm⁻¹	Effective Length (le) mm	Effective Area (Ae) mm²	Effective Magnetic Volume (Ve) mm³	Finish	Height	Length	Width
B64290L0048X830 FERRITE CORE TOROID 5.46UH N30 EPCOS - TDK Electronics	617 In Stock	1 : $6.96000 Tray	TX34/20.5/12.5	Tray	Active	Toroid	-	N30	1.397" (35.50mm)	5.46 µH	±25%	Ungapped	4300	0.99	82.06	82.6	6778.0	Epoxy	0.535" (13.60mm)	-	-
B64290L0048X087 FERRITE CORE TOROID 2.79UH N87 EPCOS - TDK Electronics	612 In Stock	1 : $8.08000 Box	TX34/20.5/12.5	Box	Active	Toroid	-	N87	1.397" (35.50mm)	2.79 µH	±25%	Ungapped	2200	0.99	82.06	82.6	6778.0	Epoxy	0.535" (13.60mm)	-	-
B64290L0048X038 FERRITE CORE TOROID T38 EPCOS - TDK Electronics	2,800 In Stock	1 : $9.01000 Bulk	TX34/20.5/12.5	Bulk	Active	Toroid	R 34.0 × 20.5 × 12.5	T38	-	-	±30%	Ungapped	10000	0.99	82.06	82.6	6778.0	Epoxy	-	-	-
B64290L0048X065 FERRITE CORE TOROID 6.4UH T65 EPCOS - TDK Electronics	661 In Stock	1 : $5.34000 Box	TX34/20.5/12.5	Box	Active	Toroid	-	T65	1.397" (35.50mm)	6.4 µH	±30%	Ungapped	5000	0.99	82.06	82.6	6778.0	Epoxy	0.535" (13.60mm)	-	-
B64290L0048X037 FERRITE CORE TOROID 7.6UH T37 EPCOS - TDK Electronics	0 In Stock Check Lead Time	300 : $3.98953 Box	TX34/20.5/12.5	Box	Active	Toroid	-	T37	1.397" (35.50mm)	7.6 µH	±25%	Ungapped	6000	0.99	82.06	82.6	6778.0	Epoxy	0.535" (13.60mm)	-	-

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Ferrite cores are a magnetic device used in the windings of transformers or other wound components. The chemical makeup of these devices help to prevent eddy currents. These are created in different form factors such as: E, toroid, ER, multi-hole, etc. and come in many different sizes. Key parameters are going to be the size, form factor or core type, and inductance factor.