Ferrite Cores

Browse available Ferrite Cores components by manufacturer and part number. Review stock status, datasheets and key technical parameters to compare suitable options for design, maintenance, replacement or purchasing.

If you already have a target MPN or BOM, send it to EGOO with the required quantity. Our sourcing team can check availability, lead time and quotation options, including hard-to-find and obsolete parts.

Mfr. Part #	Availability	Price	Quantity	Datasheet	Series	Packaging	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
B65813J0250A041 FERRITE CORE RM 250NH N41 2PCS EPCOS - TDK Electronics	506	-	RFQ	Datasheet	RM10	Box	Active	RM	RM 10	N41	-	250 nH	±3%	Gapped	89.0	2800	0.45	44.0	98.0	90.0	4310.0	Uncoated	0.368" (9.35mm)	1.122" (28.50mm)	0.531" (13.50mm)
ETD54/28/19-3C97 FERRITE CORE ETD 3C97 Ferroxcube	294	-	RFQ	Datasheet	-	Bulk	Active	ETD	ETD 54 x 28 x 19	3C97	-	-	-	-	-	-	-	-	-	-	-	Uncoated	1.087" (27.60mm)	2.156" (54.50mm)	0.744" (18.90mm)
B65531D0040A001 FERRITE CORE P 40NH K1 2PCS EPCOS - TDK Electronics	1,570	-	RFQ	Datasheet	P11/7	Box	Active	P (Pot Core)	P 11 x 7	K1	0.445" (11.30mm)	40 nH	±3%	Gapped	32.0	80	1.0	15.9	15.9	-	253.0	Uncoated	0.130" (3.30mm)	-	-
B64290L0616X038 FERRITE CORE TOROID 21.3UH T38 EPCOS - TDK Electronics	631	-	RFQ	Datasheet	TX25.3/14.8/20	Box	Active	Toroid	-	T38	1.047" (26.60mm)	21.3 µH	±30%	Ungapped	-	10000	0.59	60.07	102.5	-	6157.0	Epoxy	0.839" (21.30mm)	-	-
B65813J0000R049 FERRITE CORE RM 2.9UH N49 2PCS EPCOS - TDK Electronics	572	-	RFQ	Datasheet	RM10	Box	Active	RM	RM 10	N49	-	2.9 µH	-20%, +30%	Ungapped	1040.0	1500	0.45	44.0	98.0	90.0	4310.0	Uncoated	0.368" (9.35mm)	1.122" (28.50mm)	0.531" (13.50mm)
B66365G1500X187 FERRITE CORE ETD N87 1PC EPCOS - TDK Electronics	287	-	RFQ	Datasheet	ETD44/22/15	Box	Active	ETD	ETD 44 x 22 x 15	N87	-	-	-	Gapped	-	-	-	-	-	-	-	Uncoated	0.886" (22.50mm)	1.724" (43.80mm)	0.598" (15.20mm)
PQ32/30-3F36 FERRITE CORE PQ 3F36 2PC SET Ferroxcube	1,508	-	RFQ	Datasheet	-	Bulk	Active	PQ	PQ 32 x 30	3F36	-	-	-	-	-	-	-	-	-	-	-	Uncoated	1.193" (30.30mm)	1.299" (33.00mm)	0.866" (22.00mm)
C055380A2 FERRITE CORE TOROID 89NH MPP Magnetics, a division of Spang & Co.	1,484	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	MPP	0.710" (18.03mm)	89 nH	±8%	Ungapped	-	125	-	41.4	23.2	-	960.0	Coated	0.280" (7.11mm)	-	-
CMC025016010H NANOCRYSTAL CORE TOROID 65.5UH Magnetics, a division of Spang & Co.	244	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Nanocrystalline	0.984" (25.00mm)	65.5 µH	±30%	Ungapped	-	80000	-	64.3	37.0	-	-	Polyester	0.394" (10.00mm)	-	-
B65813J0000R041 FERRITE CORE RM 5.5UH N41 2PCS EPCOS - TDK Electronics	734	-	RFQ	Datasheet	RM10	Box	Active	RM	RM 10	N41	-	5.5 µH	-20%, +30%	Ungapped	1960.0	2800	0.45	44.0	98.0	90.0	4310.0	Uncoated	0.368" (9.35mm)	1.122" (28.50mm)	0.531" (13.50mm)
C055117A2 FERRITE CORE TOROID 115NH MPP Magnetics, a division of Spang & Co.	708	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	MPP	0.680" (17.27mm)	115 nH	±8%	Ungapped	-	200	-	41.2	19.2	-	791.0	Coated	0.280" (7.11mm)	-	-
PQ35/35-3F36 FERRITE CORE PQ 3F36 2PC SET Ferroxcube	366	-	RFQ	Datasheet	-	Bulk	Active	PQ	PQ 35 x 35	3F36	-	-	-	-	-	-	-	-	-	-	-	Uncoated	1.366" (34.70mm)	1.421" (36.10mm)	1.024" (26.00mm)
B65813J0630J041 FERRITE CORE RM 630NH N41 2PCS EPCOS - TDK Electronics	879	-	RFQ	Datasheet	RM10	Box	Active	RM	RM 10	N41	-	630 nH	±5%	Gapped	225.0	2800	0.45	44.0	98.0	90.0	4310.0	Uncoated	0.368" (9.35mm)	1.122" (28.50mm)	0.531" (13.50mm)
B65813J1600K041 FERRITE CORE RM 1.6UH N41 2PCS EPCOS - TDK Electronics	209	-	RFQ	Datasheet	RM10	Box	Active	RM	RM 10	N41	-	1.6 µH	±10%	Gapped	572.0	2800	0.45	44.0	98.0	90.0	4310.0	Uncoated	0.368" (9.35mm)	1.122" (28.50mm)	0.531" (13.50mm)
5975002701 FERRITE CORE TOROID 75 Fair-Rite Products Corp.	678	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	75	1.400" (35.56mm)	-	±25%	Ungapped	-	5000	-	89.0	79.0	-	7000.0	Uncoated	0.500" (12.70mm)	-	-
C058059A2 FERRITE CORE TOROID 43NH MPP Magnetics, a division of Spang & Co.	118	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	MPP	0.930" (23.62mm)	43 nH	±8%	Ungapped	-	60	-	56.7	31.7	-	1800.0	Coated	0.330" (8.38mm)	-	-
5961002721 FERRITE CORE TOROID 140NH 61 Fair-Rite Products Corp.	216	-	RFQ	Datasheet	-	Box	Active	Toroid	-	61	1.449" (36.80mm)	140 nH	±25%	Ungapped	-	125	1.14	89.0	78.0	-	7000.0	Epoxy	0.539" (13.70mm)	-	-
B66289K0000X187 FERRITE CORE I N87 EPCOS - TDK Electronics	3,591	-	RFQ	Datasheet	I38/4/25	Tray	Active	I	I 38 x 4 x 25	N87	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	0.150" (3.81mm)	1.500" (38.10mm)	1.000" (25.40mm)
B65651D0250A048 FERRITE CORE P 250NH N48 2PCS EPCOS - TDK Electronics	1,726	-	RFQ	Datasheet	P18/11	Box	Active	P (Pot Core)	P 18 x 11	N48	0.724" (18.40mm)	250 nH	±3%	Gapped	120.0	-	0.6	25.9	43.0	-	1114.0	Uncoated	0.209" (5.30mm)	-	-
0077256A7 FERRITE CORE TOROID 35NH KOOL MU Magnetics, a division of Spang & Co.	262	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mu	1.605" (40.77mm)	35 nH	±8%	Ungapped	-	26	-	98.4	107.0	-	10600.0	Coated	0.605" (15.37mm)	-	-

Ferrite Cores FAQ

What Ferrite Cores components can I source from EGOO?

You can browse available Ferrite Cores product families, manufacturers and part numbers on this page, then review stock, datasheets and technical information for suitable options.

Can EGOO help with hard-to-source or obsolete Ferrite Cores parts?

Yes. EGOO provides sourcing support for shortage, obsolete and hard-to-find electronic components. Send us the target manufacturer part number and quantity for checking.

Does EGOO support BOM and small-batch sourcing?

Yes. We support BOM sourcing, prototype requirements and small-batch supply, together with stock, lead-time and quotation assistance.

How do I request pricing and availability?

Submit the manufacturer part number, required quantity and any package, date-code or delivery requirements through the RFQ form, and our team will review available sourcing options.