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Ferrite E cores

Based on traditional scrap-less laminated E cores, ferrite E cores are one of the most well known shapes in the industry. They are easy to assemble and wind, using industry standard mounting hardware and bobbins, and they are very affordable. E cores are used in power transformers as well as in broadband transformers. E cores can also be used in power inductors, and differential inductors.

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Dimensions of E Cores with Rectangular Cross Section
(based upon Table 2 of IMA Standard Specifications for E, U and I Cores)

SIZE	TOL	D1		D2		D3		H1		H2		w		R1		R2
SIZE	TOL	mm	in	mm	in	mm	in	mm	in	mm	in	mm	in	mm	in	mm	in
E13/4	MIN	12	0.48	8.9	0.35	3.4	0.13	6.3	0.25	4.5	0.177	3.4	0.13	–	–	–	–
	MAX	13	0.52	9.5	0.37	3.7	0.15	6.5	0.26	4.8	0.189	3.7	0.15	1	.039	0.3	0.01

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