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
B64290P0037X087 FERRITE CORE TOROID 560NH N87 EPCOS - TDK Electronics	10,331 In Stock	1 : $0.87000 Box	TC6.3/3.8/2.5	Box	Active	Toroid	-	N87	0.249" (6.32mm)	560 nH	±25%	Ungapped	2200	4.97	15.21	3.06	46.5	Parylene	0.099" (2.52mm)	-	-
B64290P0037X830 FERRITE CORE TOROID 1.09UH N30 EPCOS - TDK Electronics	1,183 In Stock	1 : $0.93000 Bulk	TC6.3/3.8/2.5	Bulk	Active	Toroid	-	N30	0.249" (6.32mm)	1.09 µH	±25%	Ungapped	4300	4.97	15.21	3.06	46.5	Parylene	0.099" (2.52mm)	-	-
B64290P0037X038 FERRITE CORE TOROID 2.53UH T38 EPCOS - TDK Electronics	7,411 In Stock	1 : $0.95000 Bulk	TC6.3/3.8/2.5	Bulk	Active	Toroid	-	T38	0.249" (6.32mm)	2.53 µH	±30%	Ungapped	10000	4.97	15.21	3.06	46.5	Parylene	0.099" (2.52mm)	-	-
B64290P0037X049 FERRITE CORE TOROID 330NH N49 EPCOS - TDK Electronics	9,755 In Stock	1 : $1.36000 Box	TC6.3/3.8/2.5	Box	Active	Toroid	R 6.3 x 3.8 x 2.5	N49	0.248" (6.30mm)	330 nH	±25%	Gapped	1500	4.97	15.21	3.06	46.5	Parylene	0.098" (2.50mm)	-	-
B64290P0037X001 FERRITE CORE TOROID 20NH K1 EPCOS - TDK Electronics	8,950 In Stock	1 : $1.93000 Box	TC6.3/3.8/2.5	Box	Active	Toroid	-	K1	0.249" (6.32mm)	20 nH	±25%	Ungapped	80	4.97	15.21	3.06	46.5	Parylene	0.099" (2.52mm)	-	-
B64290P0037X065 FERRITE CORE TOROID 1.16UH T65 EPCOS - TDK Electronics	11,541 In Stock	1 : $0.93000 Box	TC6.3/3.8/2.5	Box	Active	Toroid	-	T65	0.249" (6.32mm)	1.16 µH	±30%	Ungapped	4600	4.97	15.21	3.06	46.5	Parylene	0.099" (2.52mm)	-	-
B64290P0037X037 FERRITE CORE TOROID T37 EPCOS - TDK Electronics	0 In Stock Check Lead Time	12,000 : $0.48329 Box	TC6.3/3.8/2.5	Box	Active	Toroid	-	T37	-	-	-	Gapped	6500	-	-	-	-	Parylene	-	-	-
B64290P0037X048 FERRITE CORE TOROID N48 EPCOS - TDK Electronics	0 In Stock Check Lead Time	12,000 : $0.48482 Box	TC6.3/3.8/2.5	Box	Active	Toroid	-	N48	-	-	-	Gapped	2300	-	-	-	-	Parylene	-	-	-
B64290P0037X033 FERRITE CORE TOROID M33 EPCOS - TDK Electronics	0 In Stock Check Lead Time	12,000 : $0.52689 Box	TC6.3/3.8/2.5	Box	Active	Toroid	-	M33	-	-	-	Gapped	750	-	-	-	-	Parylene	-	-	-
B64290P0037X046 FERRITE CORE TOROID 3.6UH T46 EPCOS - TDK Electronics	0 In Stock	12,000 : $0.55148 Box	TC6.3/3.8/2.5	Box	Obsolete	Toroid	-	T46	0.249" (6.32mm)	3.6 µH	±30%	Ungapped	14000	4.97	15.21	3.06	46.5	Parylene	0.099" (2.52mm)	-	-

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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.