Ferrite Cores & Accessories

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Power Inductive EER Cores

Fair-Rite Power Inductive EER Cores have been designed to make optimum use of a given volume of ferrite material for maximum throughput power. The structure, which includes a round center post, approaches a nearly uniform cross-sectional area throughout the core and provides a winding area that minimizes winding losses. EER Cores can be supplied with the center post gapped to mechanical specifications as well as an AL value. Fair-Rite Power Inductive EER Cores are available in a range of sizes from EER25.5/18 to EER49/54 and three materials with initial permeability ranging from 2300 to 3000.

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Image	Part #	Mfr.	Description	Availability	Pricing (EUR) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Product	Type	Core	Core Size	Inductance	Tolerance	Core Material	Packaging
Ferrite Cores & Accessories 95 EER Core EER35/42 Ind 3200 nH 25% TOL 9595354202 Fair-Rite 1: €3.46 165In Stock 330Expected 02/11/2026	Mfr. Part No. 9595354202 Mouser Part No 623-9595354202	Fair-Rite	Ferrite Cores & Accessories 95 EER Core EER35/42 Ind 3200 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	165In Stock 330Expected 02/11/2026	€3.46 €2.37 €2.01 €1.77 View €1.45 €1.44	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	35 x 21 x 11.3	3.2 uH	25 %	95	Bulk
Ferrite Cores & Accessories 95 EER Core EER49/54 Ind 6500 nH 25% TOL 9595495402 Fair-Rite 1: €5.30 38In Stock	Mfr. Part No. 9595495402 Mouser Part No 623-9595495402	Fair-Rite	Ferrite Cores & Accessories 95 EER Core EER49/54 Ind 6500 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	38In Stock	€5.30 €3.67 €2.94 €2.92 View €2.65 €2.64	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	49 x 27 x 17.2	6.5 uH	25 %	95	Bulk
Ferrite Cores & Accessories 78 ER Core Set Ind 1200 nH 25% TOL 9578110502 Fair-Rite 1: €0.80 4,702In Stock	Mfr. Part No. 9578110502 Mouser Part No 623-9578110502	Fair-Rite	Ferrite Cores & Accessories 78 ER Core Set Ind 1200 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	4,702In Stock	€0.80 €0.556 €0.477 €0.424 View €0.374 €0.314 €0.287 €0.254	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	ER Core	10.8 x 2.45 x 5.9	1.2 uH	25 %	78	Bulk
Ferrite Cores & Accessories 98 EER Core EER40/46 Ind 3600 nH 25% TOL 9598404602 Fair-Rite 1: €3.33 466In Stock	Mfr. Part No. 9598404602 Mouser Part No 623-9598404602	Fair-Rite	Ferrite Cores & Accessories 98 EER Core EER40/46 Ind 3600 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	466In Stock	€3.33 €2.28 €1.94 €1.71 View €1.45 €1.40 €1.39	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	40 x 22.9 x 13.3	3.6 uH	25 %	98	Bulk
Ferrite Cores & Accessories 98 ER Core Set Ind 900 nH 25% TOL 9598100502 Fair-Rite 1: €0.516 3,910In Stock	Mfr. Part No. 9598100502 Mouser Part No 623-9598100502	Fair-Rite	Ferrite Cores & Accessories 98 ER Core Set Ind 900 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	3,910In Stock	€0.516 €0.418 €0.384 €0.365 View €0.341 €0.29 €0.287 €0.224 €0.216	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	ER Core	9.35 x 2.45 x 4.9	900 nH	25 %	98	Bulk
Ferrite Cores & Accessories 98 EER Core EER28/28 Ind 2800 nH 25% TOL 9598282802 Fair-Rite 1: €1.79 135In Stock	Mfr. Part No. 9598282802 Mouser Part No 623-9598282802	Fair-Rite	Ferrite Cores & Accessories 98 EER Core EER28/28 Ind 2800 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	135In Stock	€1.79 €1.25 €1.11	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	28.5 x 14 x 11.4	2.8 uH	25 %	98	Bulk
Ferrite Cores & Accessories 78 EER Core EER25.5 Ind 1800 nH 25% TOL 9578261802 Fair-Rite 1: €1.20 749In Stock	Mfr. Part No. 9578261802 Mouser Part No 623-9578261802	Fair-Rite	Ferrite Cores & Accessories 78 EER Core EER25.5 Ind 1800 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	749In Stock	€1.20 €0.832 €0.716 €0.669 View €0.589 €0.492 €0.444	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	25.5 x 9.3 x 7.5	1.8 uH	25 %	78	Bulk
Ferrite Cores & Accessories 78 EER Core EER28/28 Ind 2800 nH 25% TOL 9578282802 Fair-Rite 1: €3.00 88In Stock	Mfr. Part No. 9578282802 Mouser Part No 623-9578282802	Fair-Rite	Ferrite Cores & Accessories 78 EER Core EER28/28 Ind 2800 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	88In Stock	€3.00 €2.07 €1.76 €1.64 View €1.53 €1.24	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	28.5 x 14 x 11.4	2.8 uH	25 %	78	Bulk
Ferrite Cores & Accessories 78 EER Core EER35/42 Ind 2600 nH 25% TOL 9578354202 Fair-Rite 1: €2.59 187In Stock	Mfr. Part No. 9578354202 Mouser Part No 623-9578354202	Fair-Rite	Ferrite Cores & Accessories 78 EER Core EER35/42 Ind 2600 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	187In Stock	€2.59 €1.79 €1.52 €1.34 View €1.16 €1.02	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	35 x 21 x 11.3	2.6 uH	25 %	78	Bulk
Ferrite Cores & Accessories 78 EER Core EER42/44 Ind 4000 nH 25% TOL 9578424402 Fair-Rite 1: €3.97 125In Stock	Mfr. Part No. 9578424402 Mouser Part No 623-9578424402	Fair-Rite	Ferrite Cores & Accessories 78 EER Core EER42/44 Ind 4000 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	125In Stock	€3.97 €2.73 €2.31 €2.03 View €1.98 €1.97 €1.80 €1.75	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	42 x 22 x 15.2	4 uH	25 %	78	Bulk
Ferrite Cores & Accessories 95 ER Core Set Ind 950 nH 25% TOL 9595100502 Fair-Rite 1: €0.894 600In Stock	Mfr. Part No. 9595100502 Mouser Part No 623-9595100502	Fair-Rite	Ferrite Cores & Accessories 95 ER Core Set Ind 950 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	600In Stock	€0.894 €0.618 €0.532 €0.472 View €0.417 €0.35 €0.328 €0.297 €0.296	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	ER Core	9.35 x 2.45 x 4.9	950 nH	25 %	95	Bulk
Ferrite Cores & Accessories 95 EER Core EER25.5 Ind 2200 nH 25% TOL 9595261802 Fair-Rite 1: €1.02 1,110In Stock	Mfr. Part No. 9595261802 Mouser Part No 623-9595261802	Fair-Rite	Ferrite Cores & Accessories 95 EER Core EER25.5 Ind 2200 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	1,110In Stock	€1.02 €0.71 €0.61 €0.542 View €0.478 €0.402 €0.375 €0.359	Min.: 1 Mult.: 1	95	Ferrite Cores		EER Core	25.5	2.2 uH	25 %	95	Bulk
Ferrite Cores & Accessories 95 EER Core EER28/28 Ind 3500 nH 25% TOL 9595282802 Fair-Rite 1: €2.00 542In Stock	Mfr. Part No. 9595282802 Mouser Part No 623-9595282802	Fair-Rite	Ferrite Cores & Accessories 95 EER Core EER28/28 Ind 3500 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	542In Stock	€2.00 €1.44 €1.23 €1.08 View €0.929 €0.79	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	28.5 x 14 x 11.4	3.5 uH	25 %	95	Bulk
Ferrite Cores & Accessories 95 EER Core EER28/34 Ind 3350 nH 25% TOL 9595283402 Fair-Rite 1: €2.65 140In Stock	Mfr. Part No. 9595283402 Mouser Part No 623-9595283402	Fair-Rite	Ferrite Cores & Accessories 95 EER Core EER28/34 Ind 3350 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	140In Stock	€2.65 €1.82 €1.59 €1.45 View €1.35 €1.08	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	28.5 x 16.9 x	3.35 uH	25 %	95	Bulk
Ferrite Cores & Accessories 95 EER Core EER40/46 Ind 4200 nH 25% TOL 9595404602 Fair-Rite 1: €3.79 58In Stock	Mfr. Part No. 9595404602 Mouser Part No 623-9595404602	Fair-Rite	Ferrite Cores & Accessories 95 EER Core EER40/46 Ind 4200 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	58In Stock	€3.79 €2.60 €2.21 €1.94 €1.71	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	40 x 22.9 x 13.3	4.2 uH	25 %	95	Bulk
Ferrite Cores & Accessories 98 EER Core EER35/42 Ind 2600 nH 25% TOL 9598354202 Fair-Rite 1: €2.66 321In Stock	Mfr. Part No. 9598354202 Mouser Part No 623-9598354202	Fair-Rite	Ferrite Cores & Accessories 98 EER Core EER35/42 Ind 2600 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	321In Stock	€2.66 €1.84 €1.57 €1.38 View €1.21 €1.16 €1.08	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	35 x 21 x 11.3	2.8 uH	25 %	98	Bulk
Ferrite Cores & Accessories 98 EER Core EER42/44 Ind 4100 nH 25% TOL 9598424402 Fair-Rite 1: €4.06 41In Stock	Mfr. Part No. 9598424402 Mouser Part No 623-9598424402	Fair-Rite	Ferrite Cores & Accessories 98 EER Core EER42/44 Ind 4100 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	41In Stock	€4.06 €2.78 €2.35 €2.06 €1.77	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	42 x 22 x 15.2	4.1 uH	25 %	98	Bulk
Ferrite Cores & Accessories 98 EER Core EER49/54 Ind 5350 nH 25% TOL 9598495402 Fair-Rite 1: €5.26 109In Stock	Mfr. Part No. 9598495402 Mouser Part No 623-9598495402	Fair-Rite	Ferrite Cores & Accessories 98 EER Core EER49/54 Ind 5350 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	109In Stock	€5.26 €3.61 €3.06 €2.68 View €2.33 €2.30	Min.: 1 Mult.: 1	95	Ferrite Cores	Ungapped	EER Core	49 x 27 x 17.2	5.35 uH	25 %	98	Bulk
Ferrite Cores & Accessories 78 EER Core EER40/46 Ind 3400 nH 25% TOL 9578404602 Fair-Rite 600: €1.51 Non-Stocked Lead-Time 20 Weeks	Mfr. Part No. 9578404602 Mouser Part No 623-9578404602	Fair-Rite	Ferrite Cores & Accessories 78 EER Core EER40/46 Ind 3400 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	Non-Stocked Lead-Time 20 Weeks	€1.51	Min.: 600 Mult.: 100	95	Ferrite Cores	Ungapped	EER Core	40 x 22.9 x 13.3	3.4 uH	25 %	78	Bulk
Ferrite Cores & Accessories 78 EER Core EER28/34 Ind 2600 nH 25% TOL 9578283402 Fair-Rite Non-Stocked Verify Status with Factory	Mfr. Part No. 9578283402 Mouser Part No 623-9578283402 Verify Status with Factory	Fair-Rite	Ferrite Cores & Accessories 78 EER Core EER28/34 Ind 2600 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	Non-Stocked		Request a Quote	95	Ferrite Cores	Ungapped	EER Core	28.5 x 16.9 x 11.4	2.6 uH	25 %	78	Bulk
Ferrite Cores & Accessories 78 EER Core EER49/54 Ind 4200 nH 25% TOL 9578495402 Fair-Rite Non-Stocked Verify Status with Factory	Mfr. Part No. 9578495402 Mouser Part No 623-9578495402 Verify Status with Factory	Fair-Rite	Ferrite Cores & Accessories 78 EER Core EER49/54 Ind 4200 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	Non-Stocked		Request a Quote	95	Ferrite Cores	Ungapped	EER Core	49 x 27 x 17.2	4.2 uH	25 %	78	Bulk
Ferrite Cores & Accessories 95 ER Core Set Ind 1600nH 25% TOL 9595110502 Fair-Rite Non-Stocked Lead-Time 20 Weeks Verify Status with Factory	Mfr. Part No. 9595110502 Mouser Part No 623-9595110502 Verify Status with Factory	Fair-Rite	Ferrite Cores & Accessories 95 ER Core Set Ind 1600nH 25% TOL Learn More about Fair-Rite fairrite eer cores	Non-Stocked Lead-Time 20 Weeks		Request a Quote	95	Ferrite Cores	Ungapped	ER Core	10.8 x 2.45 x 5.9	1.35 uH	25 %	95	Bulk
Ferrite Cores & Accessories 95 EER Core EER42/44 Ind 5900 nH 25% TOL 9595424402 Fair-Rite Non-Stocked Verify Status with Factory	Mfr. Part No. 9595424402 Mouser Part No 623-9595424402 Verify Status with Factory	Fair-Rite	Ferrite Cores & Accessories 95 EER Core EER42/44 Ind 5900 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	Non-Stocked		Request a Quote	95	Ferrite Cores		EER Core	42 x 44	5.9 uH	25 %	95	Bulk
Ferrite Cores & Accessories 98 EER Core EER25.5 Ind 1800 nH 25% TOL 9598261802 Fair-Rite Non-Stocked Verify Status with Factory	Mfr. Part No. 9598261802 Mouser Part No 623-9598261802 Verify Status with Factory	Fair-Rite	Ferrite Cores & Accessories 98 EER Core EER25.5 Ind 1800 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	Non-Stocked		Request a Quote	95	Ferrite Cores	Ungapped	EER Core	25.5 x 9.3 x 7.5	1.8 uH	25 %	98	Bulk
Ferrite Cores & Accessories 98 EER Core EER28/34 Ind 2710 nH 25% TOL 9598283402 Fair-Rite Non-Stocked Verify Status with Factory	Mfr. Part No. 9598283402 Mouser Part No 623-9598283402 Verify Status with Factory	Fair-Rite	Ferrite Cores & Accessories 98 EER Core EER28/34 Ind 2710 nH 25% TOL Learn More about Fair-Rite fairrite eer cores	Non-Stocked		Request a Quote	95	Ferrite Cores	Ungapped	EER Core	28.5 x 16.9 x 11.4	2.71 uH	25 %	98	Bulk