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Japan, Seiwa Electric MFG. Co.Ltd
Seiwa E04RC251512 Ferrite Core Non-split Ring Cores RC and RM and RMX Types EMC Products




Made in Japan
Manufacturer: SEIWA ELECTRIC MFG.CO.,LTD
Model: E04RC251512
Product Outline and Features
• The full lineup of high-frequency band from low-frequency band.
• Non-split ring cores are available in a wide diameter range from 8.0 to 61.0.
• The surface is coated with insulating paint. (E04RM type)
Dimensions
Specifications

Method of mounting
E04SR-A/E04SR-AB
It can be fixed easily with the nail of a resin case
E04SRM
It is fixable by the pedestal (E04SRMB) of an option.
E04SR/E04SRS
It can be fixed with binding band.
E04SR401938
It can be fixed with M4 size screws.
E04SR200917
It is fixable by the pedestal (E04SRB) of an option.
Technical Information
Relation between No. of Turns/Cores and Impedance.
If impedance is insufficient as a result of the cable passing through the ferrite core once (1 turn), impedance can be increased by passing the cable through it twice or three times. Impedance increases with the square of the number of turns. However, as shown in Fig. 1, because of line capacity, impedance begins to go down when the frequency exceeds a certain level, so the frequency employed should be determined carefully.
When the number of cores in use is increased, impedance goes up in proportion to the number of cores, as shown in Fig. 2.
Gaps
A split ferrite core is easily fitted to a cable fixed in place. The split core is designed to eliminate the joint gap. As shown in Fig. 3, the characteristics of the split ferrite core are almost the same as those of the non-split (standard) ferrite core. However, if dust or foreign matter should get into the joint and produce a gap, the impedance would considerably decline at low frequencies as indicated by the curve representing the gapped ferrite core. Therefore, when fitting the split core, care should be taken not to allow dust to get into the joint.
Kouei is Distributor/Agent of Seiwa.
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