Seiwa Electric MFG. Co.
Seiwa E04 Series Ferrite Core
Made in Japan
Manufacturer: SEIWA ELECTRIC MFG.CO.,LTD
Model: E04
Split Cores SR, SRM and SRS Types
Product Outline and Features
The full lineup of high-frequency band from low-frequency band.
To suit your needs, we offer various types, such as ring-type, split type, flat type etc.
Low-frequency splitting type is equivalent to the characteristics of ring type.
| Part No. | Frequency band | Dimensions (mm) | Max. Applicable Cable Size (mm) | ||||
| A | B | C | D | E | |||
| E04SR311835F | High-frequency | 35.0 | — | 17.5 | 30.8 | 12.2 | 17.5X2.6 |
| E04SR150718 | 22.0 | 18.0 | 7.0 | 15.0 | — | ∅7.0 | |
| E04SR200917 | 21.0 | 17.0 | 9.0 | 20.0 | — | ∅9.0 | |
| E04SR200932 | 36.0 | 32.0 | 9.0 | 19.5 | — | ∅9.0 | |
| E04SR211132 | 36.0 | 32.0 | 11.0 | 20.5 | — | ∅11.0 | |
| E04SR301334 | 39.0 | 34.0 | 13.0 | 30.0 | — | ∅13.0 | |
| E04SR401938 | 61.0 | 38.0 | 19.0 | 40.0 | — | ∅19.0 | |
| E04SR130525A | 25.0 | 20.0 | 5.0 | 12.8 | 11.2 | ∅ 3.0〜5.0 | |
| E04SR130525AB | 25.0 | 20.0 | 5.0 | 12.8 | 11.2 | ∅ 3.0〜5.0 | |
| E04SR170730A | 30.0 | 23.0 | 7.0 | 16.5 | 15.0 | ∅ 4.0〜7.0 | |
| E04SR170730AB | 30.0 | 23.0 | 7.0 | 16.5 | 15.0 | ∅ 4.0〜7.0 | |
| E04SR200935A | 35.0 | 28.0 | 9.0 | 19.5 | 17.4 | ∅ 6.0〜9.0 | |
| E04SR200935AB | 35.0 | 28.0 | 9.0 | 19.5 | 17.4 | ∅ 6.0〜9.0 | |
| E04SR241336A | 36.0 | 29.0 | 13.0 | 23.5 | 22.0 | ∅ 10.0〜13.0 | |
| E04SR241336AB | 36.0 | 29.0 | 13.0 | 23.5 | 22.0 | ∅ 10.0〜13.0 | |
| E04SRS200917S | 24.6 | 20.8 | 8.4 | 24.5 | 24.2 | ∅8.0 | |
| E04SRS251512 | 19.0 | 15.0 | 14.0 | 31.0 | 29.5 | ∅14.0 | |
| E04SRM281312 | Low frequency. | 16.0 | — | 12.0 | 35.0 | 33.0 | ∅12.0 |
| E04SRM381913 | 17.0 | — | 18.0 | 45.0 | 43.0 | ∅18.0 | |
| E04SRM472715 | 20.0 | — | 27.0 | 54.0 | 52.0 | ∅26.0 | |
| E04SRM563218 | 23.0 | — | 32.0 | 65.0 | 62.0 | ∅31.0 | |
SR type: Intended to be fastened with a supplied binding band.
SR-A,SR-F type : Intended to be fixed to a cable.
SR-AB type : The plastic resin case is black.
E04SRB : Intended to be fixed to an enclosure. Mounting hole diameter range 4.8-4.9 mm, Thickness range 0.5-2.0mm (for E04SR200917)
E04SRB: Intended to be fixed to an enclosure. Mounting hole diameter range 4.8-4.9
Dimensions
| SR-F type | SR type | SRM type | E04SR401938 |
 |  |  |  |
| SR-A type SR-AB type | E04SRB | E04SRMB | SRS type |
 |  |  |  |
In mm
Split Cores SR, SRM and SRS Types
Impedance-frequency Curve
High frequency
Low frequency
Non-split Ring Cores RC and RM and RMX Types
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)
| Part No. | Frequency band | Dimensions (mm) | ||
| A | B | C | ||
| E04RC100505 | High frequency | 10.0 | 5.0 | 5.0 |
| E04RC110519 | 11.0 | 5.0 | 18.5 | |
| E04RC120715 | 11.8 | 7.3 | 15.0 | |
| E04RC120916 | 12.0 | 8.5 | 16.0 | |
| E04RC151008 | 14.5 | 10.2 | 8.0 | |
| E04RC150719 | 15.0 | 7.0 | 19.0 | |
| E04RC160928 | 16.0 | 9.0 | 28.0 | |
| E04RC161010 | 16.0 | 10.0 | 10.0 | |
| E04RC170813 | 16.5 | 8.2 | 13.0 | |
| E04RC170816 | 16.5 | 8.2 | 16.0 | |
| E04RC181006 | 17.5 | 9.5 | 6.4 | |
| E04RC181029 | 17.5 | 9.5 | 28.5 | |
| E04RC211010 | 20.5 | 10.2 | 10.0 | |
| E04RC241114 | 23.6 | 11.4 | 14.0 | |
| E04RC251512 | 25.0 | 15.0 | 12.0 | |
| E04RC281613 | 28.0 | 16.0 | 13.0 | |
| E04RC281620 | 28.0 | 16.0 | 20.0 | |
| E04RC311908 | 31.0 | 19.0 | 8.0 | |
| E04RC613620 | 61.0 | 35.5 | 20.0 | |
Dimensions
| Part No. | Frequency band | Dimensions (mm) | ||
| A | B | C | ||
| E04RM201010 | Low frequency | 20.0 | 10.0 | 10.0 |
| E04RM251512 | 25.0 | 15.0 | 12.0 | |
| E04RM381913 | 38.0 | 19.0 | 12.7 | |
| E04RM472715 | 47.0 | 27.0 | 15.0 | |
| E04RMX201010 | 20.0 | 10.0 | 10.0 | |
| E04RMX251512 | 25.0 | 15.0 | 12.0 | |
| E04RMX381913 | 38.0 | 19.0 | 12.7 | |
| E04RMX472715 | 47.0 | 27.0 | 15.0 | |
Impedance-frequency Curve
Ferrite Cores for FPC FD Type
Product Outline and Features
You can choose the size of the wide variations depending on the size you wish.
Dimensions
| Part No. | Dimensions (mm) | ||||
| A | B | C | D | E | |
| E04FD070503 | 2.0 | 9.5 | 3.0 | 0.5 | 7.0 |
| E04FD070504 | 2.0 | 9.5 | 4.0 | 0.5 | 7.0 |
| E04FD070505 | 2.0 | 9.5 | 5.0 | 0.5 | 7.0 |
| E04FD110503 | 2.0 | 13.5 | 3.0 | 0.5 | 11.0 |
| E04FD110504 | 2.0 | 13.5 | 4.0 | 0.5 | 11.0 |
| E04FD110505 | 2.0 | 13.5 | 5.0 | 0.5 | 11.0 |
| E04FD110506 | 2.0 | 13.5 | 6.0 | 0.5 | 11.0 |
| E04FD110508 | 2.0 | 13.5 | 8.0 | 0.5 | 11.0 |
| E04FD110510 | 2.0 | 13.5 | 10.0 | 0.5 | 11.0 |
| E04FD130503 | 2.0 | 15.5 | 3.0 | 0.5 | 13.0 |
| E04FD130504 | 2.0 | 15.5 | 4.0 | 0.5 | 13.0 |
| E04FD130505 | 2.0 | 15.5 | 5.0 | 0.5 | 13.0 |
| E04FD130506 | 2.0 | 15.5 | 6.0 | 0.5 | 13.0 |
| E04FD130508 | 2.0 | 15.5 | 8.0 | 0.5 | 13.0 |
| E04FD130510 | 2.0 | 15.5 | 10.0 | 0.5 | 13.0 |
Ferrite Cores for FPC and FFC FG Types
| Part No. | Dimensions (mm) | Applicable Cable | ||||
| A | B | C | D | E | ||
| E04FG170808 | 5.0 | 21.0 | 8.0 | 0.8 | 17.0 | For FPC |
| E04FG200712 | 3.0 | 23.0 | 12.0 | 0.7 | 20.0 | |
| E04FG210810 | 3.0 | 25.0 | 10.0 | 0.8 | 21.0 | |
| E04FG270712 | 3.0 | 31.0 | 12.0 | 0.7 | 27.0 | |
| E04FG280808 | 5.0 | 32.0 | 8.0 | 0.8 | 28.0 | |
| E04FG280812 | 5.0 | 32.0 | 12.0 | 0.8 | 28.0 | |
| E04FG280820 | 5.0 | 32.0 | 20.0 | 0.8 | 28.0 | |
| E04FG340812 | 5.0 | 38.0 | 12.0 | 0.8 | 34.0 | |
| E04FG460808 | 5.0 | 50.0 | 8.0 | 0.8 | 46.0 | |
| E04FG460812 | 5.0 | 50.0 | 12.0 | 0.8 | 46.0 | |
| E04FG530812 | 5.0 | 57.0 | 12.0 | 0.8 | 53.0 | |
| E04FG171308 | 6.5 | 21.5 | 8.0 | 1.3 | 16.5 | For FFC |
| E04FG191308 | 6.5 | 24.0 | 8.0 | 1.3 | 19.0 | |
| E04FG221308 | 6.5 | 27.0 | 8.0 | 1.3 | 22.0 | |
| E04FG221312 | 6.5 | 27.0 | 12.0 | 1.3 | 22.0 | |
| E04FG281308 | 6.5 | 33.5 | 8.0 | 1.3 | 28.0 | |
| E04FG281310 | 6.5 | 33.5 | 10.0 | 1.3 | 28.0 | |
| E04FG281312 | 6.5 | 33.5 | 12.0 | 1.3 | 28.0 | |
| E04FG351312 | 6.5 | 40.0 | 12.0 | 1.3 | 34.8 | |
| E04FG401308 | 6.5 | 45.2 | 8.0 | 1.3 | 40.0 | |
| E04FG401312 | 6.5 | 45.2 | 12.0 | 1.3 | 40.0 | |
| E04FG441308 | 6.5 | 49.8 | 8.0 | 1.3 | 44.0 | |
| EO4FG441312 | 6.5 | 49.6 | 12.0 | 1.3 | 44.0 | |
| EO4FG521312 | 7.0 | 57.9 | 12.0 | 1.3 | 52.0 | |
Impedance-frequency Curve
