AC Line Filters Common Mode SCF Coils, SCF Series, High Inductance Type Overview Applications The KEMET SCF coils are common mode chokes with a Audio-visual equipment wide variety of characteristics. These toroidal coils are Home appliances designed with nanocrystalline metal cores and are useful Power supplies i n va r i o us n ois e c o u n te r m easu r e fi e l ds. Benefits Nanocrystalline metal core Ultra-high inductance Ultra-high permeability O p e r a ti n g te m p e r a t u r e r a n g e fr o m 25 C to +12 0C U L 9 4 V0 fla m e r e t a r da n t r a te d c a p Part Number System SCF 27 -10 -1300 Dimension Code Rated Current Inductance (mH) Series Core Orientation (See Dimensions) (A) Minimum SCF Blank 0x = x A xx00 = xx mH Blank = Vertical type 20 xx = xx A xx0 = x.x mH H = Horizontal type 25 27 Examples: Examples: 02 = 2 A 1300 = 13 mH 10 = 10 A 650 = 6.5 mH One world. One KEMET KEMET Electronics Corporation KEMET Tower One East Broward Boulevard LF0012 SCF 11/12/2019 1 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.comAC Line Filters Common Mode SCF Coils, SCF Series, High Inductance Type Magnetic Permeability of Ferrite Material I n o r d e r to a c hieve m os t e ffi c ie n t n oise r e d u c ti o n , i t is i m p o r t a n t to se l e c t th e ma te r ial a c c o r di n g to th e t a r g e t f r e q u e n c y band. Depending on its magnetic permeability, a particular ferrite material or metal material will be effective in a certain frequency band. A schematic representation of the relationship between the magnetic permeability of each material and the corresponding effective band range is shown in Figure 1. Ferrite materials with higher magnetic permeability are effective in the lower frequency range, while those with lower magnetic permeability are effective in the higher frequency range. Thus, Mn-Zn products are mainly used for reducing conduction noise, while Ni-Zn products are commonly used for radiation noise countermeasures. Metal materials, however, are effective throughout the broadband frequency range, in low as well as high frequencies. The effective frequency range varies depending on core shape, size, and number of windings. This frequency dependence of th e ma g n e ti c p e r m ea b ili t y as s h ow n i n th e fi g u r e s e r ves fo r r e fe r e n c e p u r p os es o nl y. I t s h o u l d b e tes te d o n th e a c t ual device to determine its effectiveness. S18H, S15H, 10H, 7H, 5H, 1400L, and 700L are KEMETs proprietary ferrite material names. Other materials are available upon request. Figure 1 - Relationship between the magnetic permeability of each material and its effective frequency range Higher magnetic permeability: Higher noise suppression effect in the broadband frequency range Nanocrystalline Core 20,000 Higher magnetic permeability: Mn-Zn Series Higher noise suppression effect in the lower frequency range S18H S15H Lower magnetic permeability: Higher noise suppression effect 10,000 10H in the higher frequency range 7H 5H Ni-Zn Series 1400L 700L 0 10 kHz 100 kHz 1 MHz 10 MHz 100 MHz 1 GHz Effective Frequency Range KEMET Electronics Corporation KEMET Tower One East Broward Boulevard LF0012 SCF 11/12/2019 2 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.com Magnetic Permeability