common mode line chokes C ee styles document 141-1 schematic typical application low cost vde, iec, ul, csa compatible 3750 vrms isolation between windings ul approved class 130c insulation system available (ul file e83628) industry-standard ee25 size wide range of available inductances and cur- rent ratings coilcraft designers kit no. p202 contains sam- ples of 8 standard ee and toroidal common mode line chokes. to order, please contact coilcraft. coilcraft common mode standard packages in- corporate several features to help meet the re- quirements of all major international safety agencies. these include 2mm thick center flanges and 3mm creepage and clearance from all terminations to the core. common mode chokes are used to greatly re- duce ac line conducted interference produced by switching power supplies. this configuration produces opposing magnetic fluxes in the core that serve to cancel inphase noise signals ap- pearing across the ac line. this mode allows much more filtering capability in a given core size than would be possible using differential filtering alone. use of common mode chokes therefore reduces component count as well as inductor size. combining both common and differential mode chokes gives the power supply designer the added flexibility required to adjust the filtering to meet fcc, vde, and other requirements as well as optimize the circuit for the particular noise levels and frequencies produced by each power supply design. the coilcraft packaging of common mode chokes allows windings to be balanced within 1% and features the cost effectiveness of standard ee core styles. specifications subject to change without notice. document 141-1 revised 6/6/95
common mode line chokes C ee styles standard ee line chokes standard ee line chokes high inductance part current dcr max inductance number rating 1 ohms min 2 e3490-a 500 ma .980 9.9 mh e3491-a 750 ma .390 3.9 e3492-a 1 amp .270 2.9 e3493-a 1 1 4 amp .190 2.1 e3494-a 1 1 2 amp .105 1.1 e3495-a 2 amp .069 731 m h e3496-a 2 1 2 amp .044 468 e3497-a 3 amp .029 299 e3498-a 4 amp .016 168 1. based on 300 circular mils/amp. temperature rise is less than 10 c. 2. per section. typical values will run approximately 30% higher than published minimums. 3. operating temperature range C40 c to +85 c. 4. electrical specifications at 25 c. 5. parts in bold type are included in coilcraft designers kit no. p202. part current dcr max inductance number rating 1 ohms min 2 e3499-a 500 ma 1.260 16.8 mh e3500-a 750 ma .500 6.6 e3501-a 1 amp .350 4.9 e3502-a 1 1 4 amp .230 3.6 e3503-a 1 1 2 amp .130 1.87 e3504-a 2 amp .087 1.24 e3505-a 2 1 2 amp .055 796 m h e3506-a 3 amp .037 508 e3507-a 4 amp .022 286 1. based on 300 circular mils/amp. temperature rise is less than 10 c. 2. per section. typical values will run approximately 30% higher than published minimums. 3. operating temperature range C40 c to +85 c. 4. electrical specifications at 25 c. for custom values or information on toroidal common mode line chokes, please contact coilcraft. document 141-2 specifications subject to change without notice. document 141-2 revised 9/19/00
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