AC Line Filters Common Mode SSRH Coils, 7H-M Series, High Impedance Type Overview Applications The KEMET SSRH7H-M coils are common mode chokes Audio-visual equipment with a wide variety of characteristics. These low current O ffi c e au to ma ti o n e q u i p m e n t and high inductance, gear type coils are designed with our Digital appliances proprietary high permeability ferrite S18H cores and are Compact power supplies us e f u l i n va r i o us n ois e c o u n te r m easu r e fi e l ds. The optimized core shape and product structure is ideal for demanding compact applications where space is of highest priority and where smaller is better. Benefits Proprietary S18H ferrite material High permeability Large inductance due to non-divided bobbin Small gear common mode choke for low current applications 12 m m h e i g h t l ow p r o fi l e 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 bas e a n d b o b b i n Part Number System SSRH 7 H-M 03 1157 Core Orientation Rated Current Inductance (mH) Series Core Size Code and Bobbin Type (A) Minimum SSRH 7 H-M = Horizontal, bobbin without 0x = 0.x A xxxx = xxx.x mH sectional winding structure xx = x.x A xxx = xx.x 0xx = x.x mH Examples: 03 = 0.3 A Examples: 13 = 1.3 A 1157 = 115.7 mH 596 = 59.6 mH 029 = 2.9 mH One world. One KEMET KEMET Electronics Corporation KEMET Tower One East Broward Boulevard LF0040 SSRH7H-M 2/3/2020 1 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.comAC Line Filters Common Mode SSRH Coils, 7H-M Series, High Impedance 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 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. 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. 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 a n d 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 can also be available on request. Figure 1 - Relationship between the magnetic permeability of each material and its effective frequency range 20,000 Higher magnetic permeability: Higher noise suppression effect Mn-Zn Series in the lower frequency range S18H S15H 10H 10,000 Lower magnetic permeability: Higher noise suppression effect 7H in the higher frequency range 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 LF0040 SSRH7H-M 2/3/2020 2 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.com Magnetic Permeability