AC Line Filters Common Mode SSR Coils, 21NVS/NHS Series, Wide Range Impedance Type Overview Applications The KEMET SSR coils are common mode chokes with a Audio-visual equipment wide variety of characteristics. These gear type coils are O ffi c e au to ma ti o n e q u i p m e n t designed with our proprietary high permeability ferrite Digital appliances S15H cores and are useful in various noise countermeasure Power supplies fi e l ds. Benefits Proprietary S15H ferrite material High permeability High impedance in wide frequency range due to divided bobbin C o m pa c t size , l ow p r o fi l e , a n d li g h t we i g h t 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 SSR 21N VS- 03 1590 Rated Current Inductance (mH) Series Core Size Code Core Orientation and Bobbin Type (A) Minimum SSR 21N HS = Horizontal, bobbin with sectional 0x = 0.x A xxx0 = xxx mH winding structure xx = x.x A xxx = xx.x mH VS = Vertical, bobbin with sectional winding structure Examples: Examples: 03 = 0.3 A 1590 = 159 mH 13 = 1.3 A 034 = 3.4 mH One world. One KEMET KEMET Electronics Corporation KEMET Tower One East Broward Boulevard LF0045 SSR21NVS-NHS 2/3/2020 1 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.comAC Line Filters Common Mode SSR Coils, 21NVS/NHS Series, Wide Range 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 LF0045 SSR21NVS-NHS 2/3/2020 2 Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.com Magnetic Permeability