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	Effective Permeability (µe)	Initial Permeability (µi)	Core Factor (ΣI/A) mm⁻¹	Effective Length (le) mm	Effective Area (Ae) mm²	Minimum Core Cross Section (Amin) mm²	Effective Magnetic Volume (Ve) mm³	Finish	Height	Length	Width
E18/4/10/R-3C95 FERRITE CORE E 3C95 Ferroxcube	4,577 In Stock	1 : £1.14000 Bulk	-	Bulk	Active	E	E 18 x 4 x 10	3C95	-	-	-	-	-	-	-	-	-	-	-	Uncoated	0.157" (4.00mm)	0.709" (18.00mm)	0.394" (10.00mm)
B66283G0000X197 FERRITE CORE ELP N97 1PC EPCOS - TDK Electronics	2,198 In Stock	1 : £1.49000 Tray	ELP18/4/10	Tray	Active	ELP	ELP 18 x 4 x 10	N97	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.157" (4.00mm)	0.709" (18.00mm)	0.394" (10.00mm)
B66285G0000X187 FERRITE CORE ELP N87 1PC EPCOS - TDK Electronics	15,883 In Stock	1 : £1.21000 Box	ELP22/6/16	Box	Active	ELP	ELP 22 x 6 x 16	N87	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.224" (5.70mm)	0.858" (21.80mm)	0.622" (15.80mm)
B66285K0000X187 FERRITE CORE I N87 EPCOS - TDK Electronics	1,930 In Stock	1 : £1.32000 Tray	I22/2.5/16	Tray	Active	I	I 22 x 2.5 x 16	N87	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.098" (2.50mm)	0.858" (21.80mm)	0.622" (15.80mm)
B66283K0000X187 FERRITE CORE I N87 EPCOS - TDK Electronics	2,344 In Stock	1 : £1.41000 Tray	I18/2/10	Tray	Active	I	I 18 x 2 x 10	N87	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.079" (2.00mm)	0.709" (18.00mm)	0.394" (10.00mm)
B66283G0000X149 FERRITE CORE ELP N49 1PC EPCOS - TDK Electronics	5,874 In Stock	1 : £1.54000 Box	ELP18/4/10	Box	Active	ELP	ELP 18 x 4 x 10	N49	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.157" (4.00mm)	0.709" (18.00mm)	0.394" (10.00mm)
B65803P0000R049 FERRITE CORE RM 950NH N49 2PCS EPCOS - TDK Electronics	845 In Stock	1 : £2.10000 Box	RM4/LP	Box	Active	RM	RM 4 LP	N49	-	950 nH	-20%, +30%	Ungapped	900.0	1500	1.2	17.3	14.5	11.3	251.0	Uncoated	0.154" (3.90mm)	0.433" (11.00mm)	0.181" (4.60mm)
B65803P0000R087 FERRITE CORE RM 1.3UH N87 2PCS EPCOS - TDK Electronics	1,104 In Stock	1 : £2.16000 Box	RM4/LP	Box	Active	RM	RM 4 LP	N87	-	1.3 µH	-20%, +30%	Ungapped	1230.0	2200	1.2	17.3	14.5	11.3	251.0	Uncoated	0.154" (3.90mm)	0.433" (11.00mm)	0.181" (4.60mm)
B66285K0000X149 FERRITE CORE I N49 EPCOS - TDK Electronics	227 In Stock	1 : £1.63000 Tray	I22/2.5/16	Tray	Active	I	I 22 x 2.5 x 16	N49	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.098" (2.50mm)	0.858" (21.80mm)	0.622" (15.80mm)
B66285G0000X197 FERRITE CORE ELP N97 1PC EPCOS - TDK Electronics	1,530 In Stock	1 : £1.86000 Box	ELP22/6/16	Box	Active	ELP	ELP 22 x 6 x 16	N97	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.224" (5.70mm)	0.858" (21.80mm)	0.622" (15.80mm)
B66285G0000X149 FERRITE CORE ELP N49 1PC EPCOS - TDK Electronics	1,200 In Stock	1 : £2.12000 Box	ELP22/6/16	Box	Active	ELP	ELP 22 x 6 x 16	N49	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.224" (5.70mm)	0.858" (21.80mm)	0.622" (15.80mm)
B65803P0000Y038 FERRITE CORE RM 5UH T38 2PCS EPCOS - TDK Electronics	53 In Stock	1 : £2.41000 Box	RM4/LP	Box	Active	RM	RM 4 LP	T38	-	5 µH	-30%, +40%	Ungapped	4750.0	2300	1.2	17.3	14.5	11.3	251.0	Uncoated	0.154" (3.90mm)	0.433" (11.00mm)	0.181" (4.60mm)

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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.