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EMI Cores

KEMET EMI Cores provide high-frequency noise suppression in electronic circuits. There are two ferrite material options for KEMET EMI Cores, namely Nickel-Zinc (NiZn) and Manganese Zinc (MnZn). The NiZn core material is typically effective for theMHz band range (FM-band frequencies), whereas the MnZn core material is typically effective for the kHz band range (AM-band frequencies). The MnZn core material offers a lower resistance compared to the NiZn and hence adequate insulation is required before use (recommended to measure the actual frequency-range effectiveness in the target application). The effective frequency range varies depending on core shape, size, and the number of turns.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (IDR) Filter the results in the table by unit price based on your quantity.	Qty.	Product Type	Product
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 25.5mm ESD-R-47D-B KEMET 1: Rp235.929,56 163In Stock 180Expected 24/12/2026	Mfr. Part No. ESD-R-47D-B Mouser Part No 80-ESD-R-47D-B	KEMET	Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 25.5mm Learn More about KEMET emi cores	Datasheet	163In Stock 180Expected 24/12/2026	Rp235.929,56 Rp157.592,14 Rp131.357,36 Rp122.734,74	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 52.5x22.7x18.5mm Mn-Zn Case ESD-R-47H KEMET 1: Rp295.554,06 8In Stock	Mfr. Part No. ESD-R-47H Mouser Part No 80-ESD-R-47H	KEMET	Ferrite Toroids / Ferrite Rings 52.5x22.7x18.5mm Mn-Zn Case Learn More about KEMET emi cores	Datasheet	8In Stock	Rp295.554,06 Rp189.330,72 Rp160.160,58	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 51x24.4x19mm 10MHz Mn-Zn 120C ESD-R-47M-H KEMET 1: Rp151.354,50 67In Stock	Mfr. Part No. ESD-R-47M-H Mouser Part No 80-ESD-R-47M-H	KEMET	Ferrite Toroids / Ferrite Rings 51x24.4x19mm 10MHz Mn-Zn 120C Learn More about KEMET emi cores	Datasheet	67In Stock	Rp151.354,50 Rp89.895,40 Rp77.970,50 Rp72.833,62	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 47x27x15mm Mn-Zn Bare ESD-R-47S KEMET 1: Rp173.186,24 55In Stock	Mfr. Part No. ESD-R-47S Mouser Part No 80-ESD-R-47S	KEMET	Ferrite Toroids / Ferrite Rings 47x27x15mm Mn-Zn Bare Learn More about KEMET emi cores	Datasheet	55In Stock	Rp173.186,24 Rp102.187,22 Rp99.068,40 Rp86.776,58 Rp85.308,90	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 47x27x15mm 150kHz Mn-Zn 85C ESD-R-47SR KEMET 1: Rp249.138,68 100In Stock	Mfr. Part No. ESD-R-47SR Mouser Part No 80-ESD-R-47SR	KEMET	Ferrite Toroids / Ferrite Rings 47x27x15mm 150kHz Mn-Zn 85C Learn More about KEMET emi cores	Datasheet	100In Stock	Rp249.138,68 Rp170.617,80 Rp140.713,82 Rp129.706,22 Rp128.055,08	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores
Ferrite Toroids / Ferrite Rings 32.4mm ESD-R-57 KEMET 1: Rp356.829,70 53In Stock	Mfr. Part No. ESD-R-57 Mouser Part No 80-ESD-R-57	KEMET	Ferrite Toroids / Ferrite Rings 32.4mm Learn More about KEMET emi cores	Datasheet	53In Stock	Rp356.829,70 Rp232.443,82 Rp204.924,82 Rp200.154,86	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 61x32.4x24mm Mn-Zn Case and Tape ESD-R-57A-1 KEMET 1: Rp423.976,06 38In Stock	Mfr. Part No. ESD-R-57A-1 Mouser Part No 80-ESD-R-57A-1	KEMET	Ferrite Toroids / Ferrite Rings 61x32.4x24mm Mn-Zn Case and Tape Learn More about KEMET emi cores	Datasheet	38In Stock	Rp423.976,06 Rp268.401,98 Rp238.864,92 Rp233.544,58	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 57x36x20mm Mn-Zn Bare ESD-R-57S KEMET 1: Rp274.639,62 42In Stock	Mfr. Part No. ESD-R-57S Mouser Part No 80-ESD-R-57S	KEMET	Ferrite Toroids / Ferrite Rings 57x36x20mm Mn-Zn Bare Learn More about KEMET emi cores	Datasheet	42In Stock	Rp274.639,62 Rp189.330,72 Rp151.904,88 Rp146.768,00	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Clamp On Cores 16.5x6x21mm Ni-Zn Snap-on ESD-SR-100G KEMET 1: Rp48.616,90 601In Stock 1.800On Order	Mfr. Part No. ESD-SR-100G Mouser Part No 80-ESD-SR-100G	KEMET	Ferrite Clamp On Cores 16.5x6x21mm Ni-Zn Snap-on Learn More about KEMET emi cores	Datasheet	601In Stock 1.800On Order On Order Ship Dates Mfr. No: ESD-SR-100G Stock: 601 Can Dispatch Immediately On Order: 900 Expected 18/01/2027 900 Expected 03/02/2027 Factory Lead Time: 23 Weeks	Rp48.616,90 Rp33.022,80 Rp28.069,38 Rp23.482,88 View Rp20.364,06 Rp18.712,92 Rp17.630,51	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Snap On Cores
Ferrite Clamp On Cores 14.4x5x28mm Ni-Zn Snap-on ESD-SR-110G KEMET 1: Rp53.753,78 905In Stock	Mfr. Part No. ESD-SR-110G Mouser Part No 80-ESD-SR-110G	KEMET	Ferrite Clamp On Cores 14.4x5x28mm Ni-Zn Snap-on Learn More about KEMET emi cores	Datasheet	905In Stock	Rp53.753,78 Rp37.058,92 Rp31.555,12 Rp27.885,92 View Rp24.400,18 Rp21.648,28	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Snap On Cores
Ferrite Clamp On Cores 16x6x33mm Ni-Zn Snap-on ESD-SR-120G KEMET 1: Rp58.340,28 317In Stock 700Expected 17/03/2027	Mfr. Part No. ESD-SR-120G Mouser Part No 80-ESD-SR-120G	KEMET	Ferrite Clamp On Cores 16x6x33mm Ni-Zn Snap-on Learn More about KEMET emi cores	Datasheet	317In Stock 700Expected 17/03/2027	Rp58.340,28 Rp40.361,20 Rp34.307,02 Rp30.087,44 View Rp26.234,78 Rp23.849,80	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Snap On Cores
Ferrite Clamp On Cores 19.6x7x37.4mm Ni-Zn Snap-on ESD-SR-150G KEMET 1: Rp75.952,44 387In Stock	Mfr. Part No. ESD-SR-150G Mouser Part No 80-ESD-SR-150G	KEMET	Ferrite Clamp On Cores 19.6x7x37.4mm Ni-Zn Snap-on Learn More about KEMET emi cores	Datasheet	387In Stock	Rp75.952,44 Rp52.102,64 Rp44.213,86 Rp38.893,52 View Rp33.756,64 Rp32.472,42	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Snap On Cores
Ferrite Clamp On Cores 20.2x9x39mm Ni-Zn Snap-on ESD-SR-160G KEMET 1: Rp76.319,36 269In Stock	Mfr. Part No. ESD-SR-160G Mouser Part No 80-ESD-SR-160G	KEMET	Ferrite Clamp On Cores 20.2x9x39mm Ni-Zn Snap-on Learn More about KEMET emi cores	Datasheet	269In Stock	Rp76.319,36 Rp52.286,10 Rp44.397,32 Rp38.893,52 View Rp33.756,64 Rp32.655,88	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Snap On Cores
Ferrite Clamp On Cores 19.5x46.5x19.5mm 300MHz Ni-Zn 100C ESD-SR-160H KEMET 1: Rp114.295,58 200In Stock 210Expected 25/02/2027	Mfr. Part No. ESD-SR-160H Mouser Part No 80-ESD-SR-160H	KEMET	Ferrite Clamp On Cores 19.5x46.5x19.5mm 300MHz Ni-Zn 100C Learn More about KEMET emi cores	Datasheet	200In Stock 210Expected 25/02/2027	Rp114.295,58 Rp78.520,88 Rp66.595,98 Rp58.340,28 View Rp50.818,42 Rp50.084,58	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	EMI, Split Snap-In Cores
Ferrite Clamp On Cores 19.5x46.5x19.5mm 300MHz Ni-Zn 125C ESD-SR-160HL KEMET 1: Rp99.618,78 155In Stock	Mfr. Part No. ESD-SR-160HL Mouser Part No 80-ESD-SR-160HL	KEMET	Ferrite Clamp On Cores 19.5x46.5x19.5mm 300MHz Ni-Zn 125C Learn More about KEMET emi cores	Datasheet	155In Stock	Rp99.618,78 Rp68.063,66 Rp57.606,44 Rp50.268,04 Rp44.580,78	Min.: 1 Mult.: 1	Ferrite Clamp On Cores
Ferrite Clamp On Cores 30x13x42mm Ni-Zn AEC-Q200 ESD-SR-250HL KEMET 1: Rp211.896,30 48In Stock	Mfr. Part No. ESD-SR-250HL Mouser Part No 80-ESD-SR-250HL	KEMET	Ferrite Clamp On Cores 30x13x42mm Ni-Zn AEC-Q200 Learn More about KEMET emi cores	Datasheet	48In Stock	Rp211.896,30 Rp139.429,60 Rp116.680,56 Rp101.453,38	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Snap On Cores
Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 13x38x31.5x31.6mm ESD-SR-311337X-R1 KEMET 1: Rp146.401,08 2In Stock 60Expected 14/12/2026	Mfr. Part No. ESD-SR-311337X-R1 Mouser Part No 80-ESD-SR-311337X-R1	KEMET	Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 13x38x31.5x31.6mm Learn More about KEMET emi cores	Datasheet	2In Stock 60Expected 14/12/2026	Rp146.401,08 Rp99.985,70 Rp86.042,74 Rp72.833,62 Rp69.531,34	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	EMI Cores
Ferrite Clamp On Cores 44x16.5mm 10MHz Mn-Zn 85C ESD-SR-S38M KEMET 1: Rp257.210,92 136In Stock	Mfr. Part No. ESD-SR-S38M Mouser Part No 80-ESD-SR-S38M	KEMET	Ferrite Clamp On Cores 44x16.5mm 10MHz Mn-Zn 85C Learn More about KEMET emi cores	Datasheet	136In Stock	Rp257.210,92 Rp167.682,44 Rp138.512,30 Rp127.504,70 Rp125.853,56	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores
Ferrite Clamp On Cores 64x24mm 10MHz Mn-Zn 85C ESD-SR-S57M KEMET 1: Rp455.714,64 41In Stock 360On Order	Mfr. Part No. ESD-SR-S57M Mouser Part No 80-ESD-SR-S57M	KEMET	Ferrite Clamp On Cores 64x24mm 10MHz Mn-Zn 85C Learn More about KEMET emi cores	Datasheet	41In Stock 360On Order On Order Ship Dates Mfr. No: ESD-SR-S57M Stock: 41 Can Dispatch Immediately On Order: 192 Expected 04/01/2027 168 Expected 11/01/2027 Factory Lead Time: 23 Weeks	Rp455.714,64 Rp287.298,36 Rp254.825,94 Rp249.138,68	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores
Ferrite Toroids / Ferrite Rings 22x7.7x14mm 300MHz Ni-Zn 120C ESD-R-19N-H KEMET 1: Rp52.836,48 1In Stock 480Expected 24/12/2026	Mfr. Part No. ESD-R-19N-H Mouser Part No 80-ESD-R-19N-H	KEMET	Ferrite Toroids / Ferrite Rings 22x7.7x14mm 300MHz Ni-Zn 120C Learn More about KEMET emi cores	Datasheet	1In Stock 480Expected 24/12/2026	Rp52.836,48 Rp35.591,24 Rp30.454,36 Rp26.785,16 View Rp23.115,96 Rp21.648,28 Rp18.896,38	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings Nickel Zinc 300MHz 7x12x5.5mm ESD-R-12S KEMET 1: Rp15.043,72 6.000Expected 25/02/2027	Mfr. Part No. ESD-R-12S Mouser Part No 80-ESD-R-12S	KEMET	Ferrite Toroids / Ferrite Rings Nickel Zinc 300MHz 7x12x5.5mm Learn More about KEMET emi cores	Datasheet	6.000Expected 25/02/2027	Rp15.043,72 Rp10.365,49 Rp9.117,96 Rp8.108,93 View Rp7.173,29 Rp6.054,18 Rp5.265,30 Rp4.935,07	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 19mm ESD-R-31C KEMET 1: Rp43.113,10 1.699On Order	Mfr. Part No. ESD-R-31C Mouser Part No 80-ESD-R-31C	KEMET	Ferrite Toroids / Ferrite Rings 19mm Learn More about KEMET emi cores	Datasheet	1.699On Order On Order Ship Dates Mfr. No: ESD-R-31C Stock: 0 On Order: 199 Expected 21/01/2027 1.500 Expected 22/04/2027 Factory Lead Time: 23 Weeks	Rp43.113,10 Rp29.720,52 Rp25.317,48 Rp22.382,12 View Rp19.630,22 Rp16.694,86	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 32x19.5x9mm Ni-Zn Coated ESD-R-31C-1 KEMET 1: Rp77.603,58 900Expected 21/01/2027	Mfr. Part No. ESD-R-31C-1 Mouser Part No 80-ESD-R-31C-1	KEMET	Ferrite Toroids / Ferrite Rings 32x19.5x9mm Ni-Zn Coated Learn More about KEMET emi cores	Datasheet	900Expected 21/01/2027	Rp77.603,58 Rp53.203,40 Rp45.314,62 Rp39.443,90 View Rp34.307,02 Rp31.555,12	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Clamp On Cores 7x37.4x20.3mm Ni-Zn 65C ESD-SR-150 KEMET 1: Rp79.254,72 7.920On Order	Mfr. Part No. ESD-SR-150 Mouser Part No 80-ESD-SR-150	KEMET	Ferrite Clamp On Cores 7x37.4x20.3mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	7.920On Order On Order Ship Dates Mfr. No: ESD-SR-150 Stock: 0 On Order: 2.320 Expected 07/12/2026 2.400 Expected 14/12/2026 3.200 Expected 28/12/2026 Factory Lead Time: 23 Weeks	Rp79.254,72 Rp54.304,16 Rp46.231,92 Rp40.177,74 View Rp35.040,86 Rp32.472,42	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores
Ferrite Clamp On Cores 30x53x30mm 300MHz Ni-Zn 100C ESD-SR-250H KEMET 1: Rp216.849,72 660Expected 26/11/2026	Mfr. Part No. ESD-SR-250H Mouser Part No 80-ESD-SR-250H	KEMET	Ferrite Clamp On Cores 30x53x30mm 300MHz Ni-Zn 100C Learn More about KEMET emi cores	Datasheet	660Expected 26/11/2026	Rp216.849,72 Rp145.300,32 Rp121.450,52 Rp104.939,12	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	EMI, Split Snap-In Cores

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