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
E42/21/15-3F36-G500 FERRITE CORE E 3F36 Ferroxcube	1,899	-	RFQ	Datasheet	-	Bulk	Active	E	E 42 x 21 x 15	3F36	-	-	-	-	-	-	-	-	-	-	-	Uncoated	0.827" (21.00mm)	1.693" (43.00mm)	0.598" (15.20mm)
ER48/21/21-3C94 FERRITE CORE ER 3C94 Ferroxcube	4,566	-	RFQ	Datasheet	-	Bulk	Active	ER	ER 48 x 21 x 21	3C94	-	-	-	-	-	-	-	-	-	-	-	Uncoated	0.835" (21.20mm)	1.890" (48.00mm)	0.827" (21.00mm)
ER54/18/18-3C94-G200 FERRITE CORE ER 3C94 Ferroxcube	4,134	-	RFQ	Datasheet	-	Bulk	Active	ER	ER 54 x 18 x 18	3C94	-	-	-	-	-	-	-	-	-	-	-	Uncoated	0.720" (18.30mm)	2.106" (53.50mm)	0.707" (17.95mm)
ER48/21/21-3C90 Ferrite Misc Ferroxcube	1,972	-	RFQ	Datasheet	-	Bulk	Active	ER	ER 48 x 21 x 21	3C90	-	-	-	Ungapped	1900.0	-	-	-	-	-	-	Uncoated	-	-	-
EP20-3C91 FERRITE CORE EP 3C91 2PC SET Ferroxcube	4,460	-	RFQ	Datasheet	-	Bulk	Active	EP	EP 20	3C91	-	-	±25%	Ungapped	2040.0	-	0.52	41.1	78.7	60.8	3230.0	Uncoated	0.843" (21.40mm)	0.945" (24.00mm)	0.591" (15.00mm)
EP20-3C94 Ferrite Misc Ferroxcube	3,384	-	RFQ	Datasheet	-	Bulk	Active	EP	EP 20	3C94	-	4.435 µH	±25%	Ungapped	1840.0	-	0.52	41.1	78.7	60.8	3230.0	Uncoated	0.421" (10.40mm)	0.945" (24.00mm)	0.591" (15.00mm)
B65817J0000Y030 RM3 N30 1600 +40% EPCOS - TDK Electronics	2,540	-	RFQ	Datasheet	-	Tape & Reel (TR)	Active	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ZF43615TC TOROID GREY COATED Magnetics, a division of Spang & Co.	1,548	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	F	1.463" (37.15mm)	4.04 µH	±20%	Ungapped	-	3000	-	89.6	93.3	-	8366.0	Epoxy	0.614" (15.60mm)	-	-
C058050A5 HIGH FLUX 125 PERM KHAKI 050 SIZ Magnetics, a division of Spang & Co.	3,123	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	High Flux	0.530" (13.45mm)	56 nH	±8%	Ungapped	-	125	-	31.2	10.9	-	340.0	Coated	0.217" (5.51mm)	-	-
0058040AY HIGH FLUX 125 PERM AY 040 SIZE Magnetics, a division of Spang & Co.	1,971	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	High Flux	0.400" (10.15mm)	66 nH	±8%	Ungapped	-	125	-	23.0	9.57	-	220.0	Uncoated	0.156" (3.96mm)	-	-
B65982E0000D001 SPULENKOERPER PQ50/50 PHENOLIC EPCOS - TDK Electronics	3,484	-	RFQ	Datasheet	-	Bulk	Active	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ETD44/22/15-3F3 Ferrite Misc Ferroxcube	2,508	-	RFQ	Datasheet	-	Bulk	Active	ETD	ETD 44 x 22 x 15	3F3	-	3.5 µH	±25%	Ungapped	1660.0	-	-	103.0	173.0	172.0	17800.0	Uncoated	0.878" (22.30mm)	1.772" (45.00mm)	0.598" (15.20mm)
B65805P0000Y038 FERRITE CORE RM T38 EPCOS - TDK Electronics	1,091	-	RFQ	Datasheet	RM5/LP	Tape & Reel (TR)	Active	RM	RM 5	T38	-	-	-30%, +40%	Ungapped	4380.0	-	0.71	17.5	24.5	18.0	430.0	Uncoated	-	0.575" (14.60mm)	0.268" (6.80mm)
B65517D0000Y038 FERRITE CORE P 5.5UH T38 2PCS EPCOS - TDK Electronics	4,931	-	RFQ	Datasheet	P9/5	Box	Active	P (Pot Core)	P 9 x 5	T38	0.366" (9.30mm)	5.5 µH	-30%, +40%	Ungapped	4930.0	10000	1.25	12.5	10.0	-	125.0	Uncoated	0.106" (2.70mm)	-	-
B65517W0000Y038 FERRITE CORE P 5.5UH T38 2PCS EPCOS - TDK Electronics	4,381	-	RFQ	Datasheet	P9/5	Box	Active	P (Pot Core)	P 9 x 5	T38	0.366" (9.30mm)	5.5 µH	-30%, +40%	Ungapped	4930.0	10000	1.13	13.4	11.9	9.3	159.0	Uncoated	0.106" (2.70mm)	-	-
ER32/6/25-3C97 FERRITE CORE ER 3C97 Ferroxcube	2,114	-	RFQ	Datasheet	-	Bulk	Active	ER	ER 32 x 6 x 25	3C97	-	-	-	-	-	-	-	-	-	-	-	Uncoated	0.236" (6.00mm)	1.264" (32.10mm)	1.000" (25.40mm)
ER32/6/25-3F36 FERRITE CORE ER 3F36 Ferroxcube	4,428	-	RFQ	Datasheet	-	Bulk	Active	ER	ER 32 x 6 x 25	3F36	-	-	-	-	-	-	-	-	-	-	-	Uncoated	0.236" (6.00mm)	1.264" (32.10mm)	1.000" (25.40mm)
PTS23/11-3F3 Ferrite Misc Ferroxcube	2,798	-	RFQ	Datasheet	-	Bulk	Active	P	PTS 23 x 11	3F3	0.902" (22.90mm)	3.28 µH	±25%	Ungapped	1510.0	-	0.55	31.6	57.2	53.6	1810.0	Uncoated	0.217" (5.51mm)	-	-
ER32/6/25-3F3 Ferrite Misc Ferroxcube	3,705	-	RFQ	Datasheet	-	Bulk	Active	ER	ER 32 x 6 x 25	3F3	-	-	±25%	Ungapped	1540.0	-	0.27	38.2	141.0	121.0	5400.0	Uncoated	0.236" (6.00mm)	1.264" (32.10mm)	1.000" (25.40mm)
B64290A0774X065 R31.5/19/12.5 T65 RINGKERN EPCOS - TDK Electronics	1,131	-	RFQ	Datasheet	-	Tray	Active	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

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.