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
RM4/I-3F3 Ferrite Misc Ferroxcube	1,145	-	RFQ	Datasheet	-	Bulk	Active	RM	RM 4	3F3	-	950 nH	±25%	Ungapped	1280.0	-	1.69	23.3	13.8	11.5	322.0	Uncoated	0.205" (5.20mm)	0.433" (11.00mm)	0.181" (4.60mm)
B66283U0315E149 FERRITE CORE EPCOS - TDK Electronics	4,371	-	RFQ	Datasheet	ELP18/4/10	Box	Active	-	-	-	-	-	-	Gapped	-	-	-	-	-	-	-	-	-	-	-
B64290L0719X035 FERRITE CORE TOROID 4UH T35 EPCOS - TDK Electronics	1,419	-	RFQ	Datasheet	TX22/14/7.9	Box	Active	Toroid	-	T35	0.917" (23.30mm)	4 µH	±25%	Ungapped	-	5300	1.66	54.2	32.6	-	1763.0	Epoxy	0.354" (9.00mm)	-	-
EFD10/5/3-3F36-A63-S FERRITE CORE EFD 63NH 3F36 2PC Ferroxcube	4,985	-	RFQ	Datasheet	-	Bulk	Active	EFD	EFD 10 x 5 x 3	3F36	-	63 nH	±8%	Gapped	165.0	-	3.29	23.7	7.2	6.5	171.0	Uncoated	0.205" (5.20mm)	0.413" (10.50mm)	0.106" (2.70mm)
EFD10/5/3-3F46-A63-S FERRITE CORE EFD 63NH 3F46 2PC Ferroxcube	3,670	-	RFQ	Datasheet	-	Bulk	Active	EFD	EFD 10 x 5 x 3	3F46	-	63 nH	±8%	Gapped	165.0	-	3.29	23.7	7.2	6.5	171.0	Uncoated	0.205" (5.20mm)	0.413" (10.50mm)	0.106" (2.70mm)
TX25/15/13-3E27 FERRITE CORE TOROID 3E+27 Ferroxcube	2,392	-	RFQ	Datasheet	-	Bulk	Active	Toroid	TX 25 x 15 x 13	3E27	1.007" (25.95mm)	-	±25%	Ungapped	5500.0	-	0.97	60.1	62.1	-	3740.0	Epoxy	0.539" (13.70mm)	-	-
B65517D0200A048 FERRITE CORE P 200NH N48 2PCS EPCOS - TDK Electronics	3,952	-	RFQ	Datasheet	P9/5	Box	Active	P (Pot Core)	P 9 x 5	N48	0.366" (9.30mm)	200 nH	±3%	Gapped	200.0	-	1.25	12.5	10.0	-	125.0	Uncoated	0.106" (2.70mm)	-	-
EFD15/8/5-3F46-A100-S FERRITE CORE EFD 100NH 3F46 2PC Ferroxcube	3,586	-	RFQ	Datasheet	-	Bulk	Active	EFD	EFD 15 x 8 x 5	3F46	-	100 nH	±6%	Gapped	180.0	-	2.27	34.0	15.0	12.2	510.0	Uncoated	0.295" (7.50mm)	0.591" (15.00mm)	0.183" (4.65mm)
EFD15/8/5-3F46-A63-S FERRITE CORE EFD 63NH 3F46 2PC Ferroxcube	1,073	-	RFQ	Datasheet	-	Bulk	Active	EFD	EFD 15 x 8 x 5	3F46	-	63 nH	±4%	Gapped	114.0	-	2.27	34.0	15.0	12.2	510.0	Uncoated	0.295" (7.50mm)	0.591" (15.00mm)	0.183" (4.65mm)
B64290A0045X001 FERRITE CORE TOROID EPCOS - TDK Electronics	1,609	-	RFQ	Datasheet	T16/9.6/6.3	Box	Active	Toroid	-	-	-	-	-	Ungapped	-	-	-	-	-	-	-	Uncoated	-	-	-
EFD12/6/3.5-3F3-S Ferrite Misc Ferroxcube	3,827	-	RFQ	Datasheet	-	Bulk	Active	EFD	EFD 12 x 6 x 3.5	3F3	-	700 nH	±25%	Ungapped	1370.0	-	2.5	28.5	11.4	10.7	325.0	Uncoated	0.244" (6.20mm)	0.492" (12.50mm)	0.138" (3.50mm)
9478204002 FERRITE CORE E 78 SET Fair-Rite Products Corp.	1,310	-	RFQ	Datasheet	-	Bulk	Active	E	-	78	-	-	±25%	Ungapped	-	2300	32.0	41.7	129.0	127.0	5380.0	Uncoated	0.250" (6.35mm)	1.250" (31.75mm)	0.801" (20.35mm)
0R42614UG PQ CORE Magnetics, a division of Spang & Co.	2,066	-	RFQ	Datasheet	-	Bulk	Active	PQ	-	R	-	5.613 µH	-	Ungapped	-	2300	-	33.3	86.4	70.9	2880.0	Uncoated	0.117" (2.97mm)	1.071" (27.20mm)	0.748" (19.00mm)
0R42521EC ER CORE Magnetics, a division of Spang & Co.	1,403	-	RFQ	Datasheet	-	Bulk	Active	ER	-	R	-	5.44 µH	-	Ungapped	-	2300	-	41.4	100.0	95.0	4145.0	Uncoated	0.315" (8.00mm)	0.984" (25.00mm)	0.709" (18.00mm)
EQK3222E040L180 KOOL MU 040 PERM EQ 3222 SIZE Magnetics, a division of Spang & Co.	3,816	-	RFQ	Datasheet	-	Bulk	Active	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ZM42212TC TOROID EPOXY COATED Magnetics, a division of Spang & Co.	1,870	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	M	0.908" (23.07mm)	17.313 µH	±30%	Ungapped	-	15000	-	54.1	52.3	-	2834.0	Epoxy	0.530" (13.46mm)	-	-
0P44308EC E-SHAPE CORE Magnetics, a division of Spang & Co.	4,903	-	RFQ	Datasheet	-	Bulk	Active	Planar E	-	P	-	9.15 µH	-	Ungapped	-	2500	-	57.5	227.0	227.0	13100.0	Uncoated	0.335" (8.50mm)	1.701" (43.20mm)	1.098" (27.90mm)
C058049A2 HIGH FLUX 147 PERM KHAKI 050 SIZ Magnetics, a division of Spang & Co.	1,906	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	High Flux	0.530" (13.45mm)	67 nH	±8%	Ungapped	-	147	-	31.2	10.9	-	340.0	Coated	0.217" (5.51mm)	-	-
EQK3626E026L174 KOOL MU 026 PERM EQ 3626 SIZE Magnetics, a division of Spang & Co.	1,822	-	RFQ	Datasheet	-	Bulk	Active	EQ	-	Kool Mu	-	75 nH	±8%	Ungapped	-	26	-	94.7	181.0	-	17122.0	Uncoated	0.685" (17.40mm)	1.417" (36.00mm)	1.024" (26.00mm)
0W41811UG POT CORE Magnetics, a division of Spang & Co.	2,391	-	RFQ	Datasheet	-	Bulk	Active	P	-	W	0.709" (18.00mm)	12 µH	-	Ungapped	-	10000	-	25.8	43.3	36.0	1120.0	Uncoated	0.209" (5.30mm)	-	-

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.