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SQ Common mode inductor typically refers to a specific type of core material—silicon steel. Therefore, an SQ common-mode choke can be understood as a common-mode choke that uses silicon steel sheets as its core.
| Core specification | Wire diameter | Vertical foot distance | Vertical(A*B) | Horizontal Foot Distance | Horizontal (A*B) |
| SQ1010 | 0.10*0.7*38Ts | 5.8*7 |  | 7*8 |  |
| SQ1212 | 0.10*1.0*52Ts 0.13*1.0*45Ts 0.15*1.0*38Ts 0.20*1.0*31Ts 0.25*1.0*25Ts | 6*8 7*8 8*11 |  | 10*13 |  |
| SQ1410 | 0.10*0.7*60TS | 5.8*7 |  | / | |
| SQ1515 | 0.10*1.0*66Ts 0.13*1.0*56Ts 0.15*1.0*50Ts 0.15*1.2*48Ts 0.15*1.5*46TS 0.15*1.5*48Ts 0.20*1.0*38Ts 0.20*1.5*39Ts 0.25*1.5*32Ts 0.30*1.5*26Ts | 7.5*10 8.0*10 10*13 |  | 10*13 9*13*17 13*17 13.5*13.5 |  |
| SQ1918 | 0.10*1.0*80TS 0.13*1.0*69Ts 0.13*1.5*69TS 0.15*1.0*64TS 0.15*1.5*64TS 0.20*1.5*48Ts 0.25*1.5*40Ts 0.30*1.5*35Ts 0.35*1.5*30Ts | 10*13 |  | 10*13 17*15.5 |  |
| SQ2418 | 0.30*1.5*48TS | 10*13 |  | 21.5*17 |  |
