Ferrite Cores

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Mfr Part #	Quantity Available	Price	Tariff Status	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
B65815E0000R087 FERRITE CORE RM 5.3UH N87 2PCS EPCOS - TDK Electronics	300 In Stock	1 : $5.71000 Box	-	RM12	Box	Active	RM	RM 12	N87	-	5.3 µH	-20%, +30%	Ungapped	1640.0	2200	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E1000J041 FERRITE CORE RM 1UH N41 2PCS EPCOS - TDK Electronics	177 In Stock	1 : $6.80000 Box	-	RM12	Box	Active	RM	RM 12	N41	-	1 µH	±5%	Gapped	311.0	2800	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0160A041 FERRITE CORE RM 160NH N41 2PCS EPCOS - TDK Electronics	272 In Stock	1 : $6.91000 Box	-	RM12	Box	Active	RM	RM 12	N41	-	160 nH	±3%	Gapped	50.0	2800	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0250A041 FERRITE CORE RM 250NH N41 2PCS EPCOS - TDK Electronics	271 In Stock	1 : $6.91000 Box	-	RM12	Box	Active	RM	RM 12	N41	-	250 nH	±3%	Gapped	78.0	2800	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0000R097 FERRITE CORE RM 5.3UH N97 2PCS EPCOS - TDK Electronics	294 In Stock	1 : $7.07000 Box	-	RM12	Box	Active	RM	RM 12	N97	-	5.3 µH	-20%, +30%	Ungapped	1640.0	2300	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0160A087 FERRITE CORE RM N87 EPCOS - TDK Electronics	391 In Stock	1 : $6.03000 Box	-	RM12	Box	Active	RM	RM 12	N87	-	-	-	Gapped	-	2200	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0400J087 FERRITE CORE RM N87 EPCOS - TDK Electronics	304 In Stock	1 : $6.03000 Box	-	RM12	Box	Active	RM	RM 12	N87	-	-	-	Gapped	-	2200	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0000R049 FERRITE CORE RM 3.7UH N49 2PCS EPCOS - TDK Electronics	412 In Stock	1 : $7.02000 Box	-	RM12	Box	Active	RM	RM 12	N49	-	3.7 µH	-20%, +30%	Ungapped	1150.0	1500	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0400J041 FERRITE CORE RM 400NH N41 2PCS EPCOS - TDK Electronics	32 In Stock	1 : $6.91000 Box	-	RM12	Box	Active	RM	RM 12	N41	-	400 nH	±5%	Gapped	124.0	2800	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0000R041 FERRITE CORE RM 6UH N41 2PCS EPCOS - TDK Electronics	4 In Stock	1 : $6.58000 Box	-	RM12	Box	Active	RM	RM 12	N41	-	6 µH	-20%, +30%	Ungapped	1860.0	2800	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0250A087 FERRITE CORE RM N87 2PCS EPCOS - TDK Electronics	0 In Stock Check Lead Time	1 : $5.93000 Box	-	RM12	Box	Active	RM	RM 12	N87	-	-	-	Gapped	-	-	0.39	57.0	146.0	-	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815E0000R030 FERRITE CORE RM 8.7UH N30 2PCS EPCOS - TDK Electronics	0 In Stock Check Lead Time	1 : $7.54000 Box	-	RM12	Box	Active	RM	RM 12	N30	-	8.7 µH	-20%, +30%	Ungapped	2700.0	4300	0.39	57.0	146.0	125.0	8320.0	Uncoated	0.484" (12.30mm)	1.480" (37.60mm)	0.634" (16.10mm)
B65815ER95 FERRITE CORE EPCOS - TDK Electronics	0 In Stock Check Lead Time	300 : $3.24527 Tape & Reel (TR)	-	*	Tape & Reel (TR)	Active	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

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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.