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	Minimum Core Cross Section (Amin) mm²	Effective Magnetic Volume (Ve) mm³	Finish	Height	Length	Width
B66397G0000X187 FERRITE CORE ETD N87 1PC EPCOS - TDK Electronics	515 In Stock	1 : ¥81.17000 Box	ETD59/31/22	Box	Active	ETD	ETD 59 x 31 x 22	N87	-	-	-	Ungapped	-	-	-	-	-	-	Uncoated	1.228" (31.20mm)	2.354" (59.80mm)	0.870" (22.10mm)
B66397G2000X187 FERRITE CORE ETD N87 1PC EPCOS - TDK Electronics	177 In Stock	1 : ¥84.85000 Box	ETD59/31/22	Box	Active	ETD	ETD 59 x 31 x 22	N87	-	-	-	Gapped	-	-	-	-	-	-	Uncoated	1.228" (31.20mm)	2.354" (59.80mm)	0.870" (22.10mm)
B66397G1500X187 FERRITE CORE ETD N87 1PC EPCOS - TDK Electronics	258 In Stock	1 : ¥84.85000 Box	ETD59/31/22	Box	Active	ETD	ETD 59 x 31 x 22	N87	-	-	-	Gapped	-	-	-	-	-	-	Uncoated	1.228" (31.20mm)	2.354" (59.80mm)	0.870" (22.10mm)
B66397Q0100K187 FERRITE CORE ETD 100NH N87 EPCOS - TDK Electronics	101 In Stock	1 : ¥88.28000 Bulk	ETD59/31/22	Bulk	Active	ETD	ETD 59 x 31 x 22	N87	-	100 nH	±10%	Distributed Gapped	-	0.38	139.0	368.0	368.0	51200.0	Uncoated	0.870" (22.10mm)	2.354" (59.80mm)	0.870" (22.10mm)
B66397Q0250K187 FERRITE CORE ETD 250NH N87 EPCOS - TDK Electronics	106 In Stock	1 : ¥92.81000 Bulk	ETD59/31/22	Bulk	Active	ETD	ETD 59 x 31 x 22	N87	-	250 nH	±10%	Distributed Gapped	-	0.38	139.0	368.0	368.0	51200.0	Uncoated	0.870" (22.10mm)	2.354" (59.80mm)	0.870" (22.10mm)
B66397G0000X197 FERRITE CORE ETD N97 1PC EPCOS - TDK Electronics	27 In Stock	1 : ¥78.26000 Box	ETD59/31/22	Box	Active	ETD	ETD 59 x 31 x 22	N97	-	-	-	Ungapped	-	-	-	-	-	-	Uncoated	1.228" (31.20mm)	2.354" (59.80mm)	0.870" (22.10mm)
B66397G1000X187 FERRITE CORE ETD N87 1PC EPCOS - TDK Electronics	85 In Stock	1 : ¥84.85000 Box	ETD59/31/22	Box	Active	ETD	ETD 59 x 31 x 22	N87	-	-	-	Gapped	-	-	-	-	-	-	Uncoated	1.228" (31.20mm)	2.354" (59.80mm)	0.870" (22.10mm)
B66397G0200X187 FERRITE CORE ETD N87 EPCOS - TDK Electronics	0 In Stock Check Lead Time	1 : ¥84.85000 Box	ETD59/31/22	Box	Active	ETD	ETD 59 x 31 x 22	N87	-	-	-	Gapped	2200	0.38	139.0	368.0	368.0	51200.0	Uncoated	1.228" (31.20mm)	2.354" (59.80mm)	0.870" (22.10mm)
B66397Q0400K187 FERRITE CORE ETD 400NH N87 EPCOS - TDK Electronics	3 In Stock	1 : ¥92.81000 Bulk	ETD59/31/22	Bulk	Active	ETD	ETD 59 x 31 x 22	N87	-	400 nH	±10%	Distributed Gapped	-	0.38	139.0	368.0	368.0	51200.0	Uncoated	0.870" (22.10mm)	2.354" (59.80mm)	0.870" (22.10mm)

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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.