EMI-suppression products
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- Jordan Sanders
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1 SMD beads SMD beads CMS4-11/3/4.8-4S2 inner channel outer channel CMS4-11/3/8.9-4S2 inner channel outer channel CMS2-5.6/3/4.8-4S2 CMS2-5.6/3/8.9-4S2 The wire is presoldered and complies with solderability test TA (method 1) in IEC Taping method IEC , EIA A and In SMD Common mode chokes 2 or 4 conductors within a single soft-ferrite block are connected along their lengths by anair gap. Common-mode signals - interference signals passingin the same direction along the input and output channels of a device (an IC for instance) - reinforce the magnetic flux aroundboth conductors, and are therefore attenuated. In contrast, the wanted signal passing along the input and output channelscancel the flux around the conductors and therefore passesunattenuated.
2 SMD beads Beads on wire a BDS3/1.8/5.3-3S1 b c 5.3 ± ± max a BDS3/1.8/5.3-4S2 b c 5.3 ± ± max a BDS3/3/4.6-3S1 b c 4.6 ± ± max BDS3/3/4.6-4S2 a b c 4.6 ± ± max BDS3/3/8.9-3S1 a b c 8.9 ± ± max BDS4.6/3/8.9-4S2 a b c 8.9 ± ± max D L l d at 100 BDW3.5/3.5-4S BDW3.5/4.7-4S BDW3.5/5.3-4S BDW3.5/6-4S BDW3.5/6.7-4S BDW3.5/7.6-4S ± BDW3.5/8.9-4S ± BDW3.5/9.5-4S ± BDW3.5/11-4S BDW3.5/14-4S ± Beads-on-wire are suitable to suppress unwanted signals between parts of a PCB. They consist of a suppression bead fi xed on a length of wire and taped on a bandolier. The bandolier fi ts most commonly used automatic mounting machines. The tape complies to tape standards IEC part 1 and EIA-RS-96-D. Our range of SMD beads replace the well known beads on wire in applications where SMD components are required. They consist of a rectangular ferrite body and a lenght of fl at copper wire, which is inserted through the ferrite and bent around to form two solder pads. The wire is presoldered and complies with solderability test TA (method 1) in IEC Taping method IEC , EIA and (1) 105
3 EMI-suppression beads D L L at 10 BD3/0.7/4-3S1 3 ± BD3/1/10-3S1 3 ± ± BD3/1/10-3S BD5.1/0.8/10-3S1 10 ± BD5.1/1.5/4-3S BD5.1/1.5/10-3S1 10 ± BD5.1/2/4-3S BD5.1/2/10-3S1 10 ± D L L at 100 BD1.9/0.8/9.8-4S2 69 BD3/0.7/4-4S2 3 ± BD3/0.8/10-4S2 3 ± ± BD3/1/4-4S2 3 ± BD3/1/10-4S2 3 ± ± BD3.5/1.3/3.3-4S ± BD3.5/1.3/6-4S ± BD3.5/1.3/13-4S ± ± BD5.1/0.8/4-4S BD5.1/0.8/10-4S2 10 ± BD5.1/1.5/4-4S BD5.1/1.5/10-4S2 10 ± BD5.1/2/4-4S BD5.1/2/7.1-4S BD5.1/2/10-4S2 10 ± BD6.4/3/25-4S ± ± BD7.7/2.3/7.6-4S BD8/1.5/4-4S BD8/1.5/10-4S ± BD8/2/4-4S BD8/2/10-4S ± BD8/3/4-4S BD8/3/10-4S ±
4 Cable Shields Tubular Cable Shields Cable Shields for Round Cable (split) CST7.8/5.3/9.8-3S4 D L L at CST8/5.3/10-3S4 50 CST8.3/3.5/10-3S4 96 CST9.5/4.8/4.8-4S2 CST9.5/4.8/6.4-4S2 CST9.5/4.8/9.5-4S ± ± ± CST9.5/4.8/10-4S ± CST9.5/4.8/13-4S ± ± CST9.5/4.8/19-4S ± ± CST9.5/5.1/15-3S4 9.5 ± ± CST9.5/5.1/15-4S2 9.5 ± ± CST9.7/5/5.1-4S CST14/6.4/5.3-4S CST14/6.4/10-4S CST14/6.4/14-4S CST14/6.4/15-4S CST14/6.4/29-4S ± CST14/7.3/29-4S ± 0.15 ± CST16/7.9/14-4S ± CST16/7.9/29-4S ± CST17/9.5/13-3S ± ± CST17/9.5/13-4S ± CST17/9.5/29-3S ± ± CST17/9.5/29-4S ± ± CST17/11/60-3S4 11 ± CST19/10/15-4S fig. nr. CSA15/7.5/29-4S2 2 CSA19/9.4/29-4S2 2 CSA26/13/29-4S2 2 CSC16/7.9/14-4S2 4 A B C D E ± ± ± ± ± ± ± Round cable shields in matching nylon cases typ at CSA15/7.5/29-4S2-EN Nylon case CSA19/9.4/29-4S2-EN Nylon case CSA26/13/29-4S2-EN Nylon case CSC16/7.9/14-4S2-EN Nylon case CST19/10/29-4S ± CST19/11/12-3S ± CST26/13/21-4S ± ± CST26/13/29-4S ± CST29/19/7.5-4S2 29 ± ± Cable shields are ideal to suppress high frequency noise on cables. For maximum efficiency theferrite should be placed as close as fit most standard round and flat cables. The split cable shields can be mounted with metal clips ornylon cases without removing connectors. 107
5 Cable Shields Bobbin Cores Flat Cable Shields (split) CSU45/6.4/29-4S2 CSU76/6.4/13-3S4 CSU76/6.4/15-3S4 CSU76/6.4/29-4S2 CSU76/6.4/29-3S4 fig. nr A B C D E 45.1 ± ± ± ± ± ± ± ± ± ± 1.3 ± ± typ at 100 CLI-CSU Flat cable shields in matching nylon cases CSU45/6.4/29-4S2-EN Nylon case CSU76/6.4/29-4S2-EN Nylon case () Flat Cable Shields BC13/4.8/16-3C90 1) BC22/12/14-3C90 22 ± 1 14 ± 1 12 ± 0.3 BC22/12/18-3C90 22 ± 1 18 ± 1 12 ± ± 0.6 BC22/12/19-3C90 22 ± ±1 12 ± 0.3 BC22/12/38-3C90 22 ± 1 38 ± ± 0.3 BC23/12/14-3C90 2) 22.6 ± 1 14 ± 1 12 ± ± 0.6 Bobbin cores are easy to wind with thick copper wire. Application is mainly as power inductor inoutput stages of converters or as EMI choke in lines with high DC currents. The magnetic circuit isopen, resulting in high current capability, but also in quite some stray flux. AL measured with fully wound bobbin 1) no central hole, 2 wire slots 2) no wire slots 108 fig. nr. CSF38/12/25-3S4 4 CSF38/12/25-3S4-S 5 A B C D E 38.1 ± ± ± ± ± ± typ at
6 A B C D D C ± ± ± ± 0.1 D C ± ± ± ± 0.1 D A ± ± ± ± 0.1 D B1 4.1 ± ± ± ± 0.1 D A ± ± ± ± 0.1 D C ± ± ± ± 0.1 D A ± ± ± ± 0.1 D B1 4.1 ± ± ± ± 0.1 D C ± ± ± ± 0.1 D C ± ± ± ± 0.1 D B1 4.1 ± ± ± ± 0.1 D C ± ± ± ± 0.1 D C ± ± ± ± 0.1 D B1 4.2 ± ± ± ± 0.1 D C ± ± ± ± 0.1 D C ± ± ± ± 0.1 thin inductors. They can be found as micro power inductors in applications such as telecom, laptops, set-top-boxes and handheld equipment. micro-precision in mechanical custom designs possible D L l d MHC6-6/10-3S4 6 ± ± MHC6-6/10-4B1 6 ± ± MHC6-6/5-4B1 6 ± MHB2-14/8.5/8-4B1 8 ± ± 0.5 MHB2-14/8.5/14-4B ± 0.5 MHB2-13/8/6-4B1 1) 8.0 ± ± ± ± 0.3 MHB2-13/8/6-3C90 1) 8.0 ± ± ± ± 0.3 MHR2-11/5.4/11-4A ± ± ± ± 0.3 MHR2-11/5.4/11-3C ± ± ± 0.3 MHR6-6.1/4/10-3B ± ± 0.3 Multi-hole cores are used for small HF transformers, for voltage or impedance matching in TV, communications,data transmission, instrumentation and similar applications. They are available with 2and 6 holes (twin cores and six-hole cores), in round and rectangular shapes. 1) Chamfered holes and sides. 109
7 Rods Dimensions (mm) ROD1.6/9-4B1-D 9 Material Type number D L ROD2/20-4B1-D ROD3/15-4B1-D ROD1.6/9-3B1-D 9 ROD3/20-4B1-D ROD2/20-3B1-D ROD3/25-4B1-D ROD3/15-3B1-D ROD4/15-4B1-D ROD3/20-3B1-D ROD4/20-4B1-D ROD3/25-3B1-D ROD4/25-4B1-D 3B1 ROD4/15-3B1-D ROD4/20-3B1-D ROD4/25-3B1-D ROD5/20-3B1-D ROD5/25-3B1-D ROD5/30-3B1-D ROD6/30-3B1-D ROD6/40-3B1-D 4B1 ROD5/20-4B1 20 ± 0.5 ROD5/20-4B1-D ROD5/25-4B1-D ROD5/30-4B1-D ROD6/30-4B1-D ROD6/40-4B1-D ROD6/50-4B1-D 50 ± 1.0 ROD6.5/25-4B1 25 ± 0.6 ROD8/32-4B ROD6/50-3B1-D 50 ± 1.0 ROD8/50-4B1 50 ± 1.0 ROD8/50-3B1 50 ± 1.0 ROD8/150-4B1 150 ± 3 ROD8/150-3B1 150 ± 3 ROD8/200-4B1 200 ± 4 ROD8/200-3B1 200 ± 4 ROD10/200-4B1 200 ± 4 ROD3/20-3S3 20 ROD3.3/17-3S3 3.3 ± ± 0.3 ROD5/20-3S3 20 ± 0.5 ROD5/25-3S3 Generally, ferrite rods are used as thecore of solenoidal chokes. Such a chokecan carry a high DC current without beingsaturated because of the open magneticcircuit. In most cases, the frequency rangewill not be limited by the material, but by thecoil capacitance. Curvature and mechanicaltolerances of the standard range fulfil therequirements of DIN41291 or its equivalentiec S3 ROD5.3/18-3S3 18 ± 0.3 ROD6/25-3S3 25 ± 0.6 ROD6/30-3S3 30 ± 0.9 ROD6.5/25-3S3 25 ± 0.6 ROD8/25-3S3 25 ± 0.75 ROD8/32-3S3 The L value and Q factor are measured (upto 6 mm outer diameter) in a standard coil,according to DIN or its equivalentiec , and compared with astandard rod.
8 Tubes Dimensions (mm) Material Type number D d L TUB3.1/1.3/19-3B1-DL TUB3.5/1.2/5-3B1 TUB3.5/1.3/3-3B1 TUB3.5/1.3/7.5-3B1 3.5 TUB3.7/1.2/3.5-3B1 TUB4/1.6/15-3B1 TUB4/1.6/40-3B1 TUB4/2/5-3B ± 0.5 TUB4.1/2/7-3B1-D 2 7 TUB4.1/2/11-3B1-D B1 TUB4.2/2/12-3B1-DL TUB4.3/2/15-3B1 TUB4.3/2/26-3B1 TUB5.3/3/22-3B1 TUB6/3/20-3B1 TUB8/4/20-3B1 TUB8/4/40-3B1 TUB8/4.2/51-3B1 TUB9.5/6.5/17-3B1 9.5 ± TUB10/4.2/20-3B1 TUB4/1.6/40-3C90 TUB5/2/50-3C90 50 ± 1 TUB6/3/20-3C90 3C90 TUB6/3/30-3C90 TUB8/4/40-3C90 TUB10/4.2/20-3C90 TUB10/6.5/20-3C90 4B1 TUB3.5/1.2/5-4B1 TUB3.7/1.2/3.5-4B1 TUB3.8/2.8/8-4B1 3.8 ± ± TUB4/1.6/15-4B1 TUB4/1.6/40-4B1 TUB4/3/9.5-4B1 4 ± 0.1 TUB4.1/2/7-4B1 7 TUB4.1/2/26-4B1 TUB4.2/2/12-4B1-DL TUB4.3/2/15-4B1 TUB6/3/20-4B1 TUB6/3/30-4B1 TUB8/4/20-4B1 TUB8/4.2/51-4B1 TUB10/6.5/20-4B1 Tubes can be used in solenoid coils withalmost the same effect as rods. The innerhole is often used to insert wires to makea ferrite coil former. In EMI suppressionapplications tubes can also be shifted overwires. Because the magnetic flux path isthen closed, a steep increase inimpedance results.in such cases however the sensitivity fordc currents is rather high. Curvature andmechanical tolerances of the standardrange fulfil the requirements of DIN 41291or its equivalent IEC former 111
9 WBC1.5/A WBC1.5/A-4S ) ) ) 100 WBC1.5/A-3S4 120 WBC1.5/A-4B1 250 WBC1.5/A-4S ) ) ) 100 WBC1.5/A-3S4 2) 50 WBC1.5/A-4B1 2) 110 WBC1.5/1.5/A-4A ) ) 180 Wide-band chokes are an alternative to a bead when more impedance or damping is required. In these products the conductor wire is wound through holes in a multi-hole ferrite core, thus separating themphysically and reducing coil capacitance. The result is a high impedance over a wide frequency range, a welcome feature for many interference problems. The present design has excellent properties andreliability by keeping the number of electrical interfaces to an absolute minimum. 112 typ typ
10 WBC2/R-4S ) ) ) 100 WBC2/R-4A WBC2.5/A-4S ) ) ) 100 WBC2.5/A-3S4 50 WBC2.5/A-4B1 180 WBC2.5/A-4A ) )
11 WBC2.5/R-3S4 50 WBC2.5/R-4B1 75 WBC2.5/R-4S ) ) ) 100 WBC2.5/SP-3S4 50 WBC2.5/SP-4B1 75 WBC3/R-4S2 5001) ) ) 100 WBC3/R-3S4 63 WBC3/R-4B1 110 WBC3/R-4A
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