Ferrite Cores

Compare the current Ferrite Cores Magnetics - Transformer, Inductor Components selection by manufacturer, stock status, datasheet and technical parameters. Use these details to narrow the list to parts that match your design, maintenance or purchasing requirements.

For a specific MPN, package, electrical rating or quantity requirement, send the details to EGOO. We can help confirm availability, quotation and alternative sourcing options.

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
0077410A7 KOOL MU 125 PERM BLACK 410 SIZE Magnetics, a division of Spang & Co.	1,274	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mu	0.270" (6.86mm)	70 nH	±12%	Ungapped	-	125	-	16.5	7.25	-	120.0	Uncoated	0.200" (5.08mm)	-	-
0077282A7 KOOL MU 026 PERM BLACK 280 SIZE Magnetics, a division of Spang & Co.	4,585	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mµ	0.380" (9.65mm)	11 nH	±8%	Ungapped	-	26	-	22.0	7.52	-	164.0	Uncoated	0.125" (3.18mm)	-	-
0077290A7 KOOL MU 125 PERM BLACK 290 SIZE Magnetics, a division of Spang & Co.	2,101	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mu	0.380" (9.65mm)	66 nH	±12%	Ungapped	-	125	-	21.8	9.45	-	206.0	Uncoated	0.156" (3.96mm)	-	-
0077835AY KOOL MU 075 PERM AY 030 SIZE Magnetics, a division of Spang & Co.	3,750	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mu	0.310" (7.87mm)	31 nH	±12%	Ungapped	-	75	-	17.9	5.99	-	107.0	Uncoated	0.125" (3.18mm)	-	-
0077381A7 KOOL MU 060 PERM BLACK 380 SIZE Magnetics, a division of Spang & Co.	3,448	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mµ	0.680" (17.27mm)	43 nH	±8%	Ungapped	-	60	-	41.4	23.2	-	960.0	Uncoated	0.250" (6.35mm)	-	-
0077281A7 KOOL MU 060 PERM BLACK 280 SIZE Magnetics, a division of Spang & Co.	4,990	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mu	0.380" (9.65mm)	25 nH	±12%	Ungapped	-	60	-	21.8	7.52	-	164.0	Uncoated	0.125" (3.18mm)	-	-
0077384A7 KOOL MU 090 PERM BLACK 380 SIZE Magnetics, a division of Spang & Co.	1,606	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mu	0.680" (17.27mm)	64 nH	±8%	Ungapped	-	90	-	41.4	23.2	-	960.0	Uncoated	0.250" (6.35mm)	-	-
0077385A7 KOOL MU 075 PERM BLACK 380 SIZE Magnetics, a division of Spang & Co.	4,063	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mu	0.680" (17.27mm)	53 nH	±8%	Ungapped	-	75	-	41.4	23.2	-	960.0	Uncoated	0.250" (6.35mm)	-	-
0077382A7 KOOL MU 026 PERM BLACK 380 SIZE Magnetics, a division of Spang & Co.	2,497	-	RFQ	Datasheet	-	Bulk	Active	Toroid	-	Kool Mµ	0.680" (17.27mm)	19 nH	±8%	Ungapped	-	26	-	41.4	23.2	-	960.0	Uncoated	0.250" (6.35mm)	-	-
FP43208IC I-CORE - FLAT BACK Magnetics, a division of Spang & Co.	1,068	-	RFQ	Datasheet	-	Bulk	Active	I	-	P	-	7.745 µH	-	Ungapped	-	2500	-	35.1	130.0	130.0	4560.0	Uncoated	0.125" (3.18mm)	1.250" (31.75mm)	0.800" (20.32mm)

Ferrite Cores FAQ

How can I narrow the current Ferrite Cores selection?

Use the available manufacturer and technical filters to compare matching parts by specifications, stock status, pricing and datasheet information.

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

Yes. Send the manufacturer part number and required quantity to our sourcing team for availability, lead-time and alternative sourcing support.

Can I request a quotation for a BOM or small-batch requirement?

Yes. EGOO supports BOM sourcing, prototype quantities and small-batch purchasing. Provide your part list and quantities for a quotation review.

What information should I provide when requesting a quote?

Please provide the target part number, manufacturer, quantity and any required date code, package or delivery requirements so our team can respond more accurately.