? electrical characteristics ? dimensions & recommended land pattern [unit : mm] ? testing instrument : 1) inductance : hp 4284a lcr meter 2) dc resistance : hioki m ? hi-tester 3220 ? tested at 100khz, 0.25 vrms. ? rated current (a) : the current when the inductance becomes 10% lower than it s nominal value or temperature rise of coil becomes ?a t=40 ? . (ta=20 ? ) sfob2813 series unshielded type 12 ? electrical characteristics ? dimensions & recommended land pattern [unit : mm] part no. inductance (uh) dc resistance ( ? )max saturation rated current (a) max. temperature rise current (a) max. sfob3412-1r12r2 2.2 uh ?? 20% 0.17 1.30 1.10 sfob3412-r784r7 4.7 uh ?? 20% 0.33 0.85 0.78 sfob3412-r656r8 6.8 uh ?? 20% 0.43 0.72 0.65 sfob3412-r54100 10.0 uh ?? 20% 0.60 0.58 0.54 sfob3412-r45150 15.0 uh ?? 20% 0.85 0.50 0.45 SFOB3412-R36220 22.0 uh ?? 20% 1.36 0.44 0.36 sfob3412-r30330 33.0 uh ?? 20% 1.90 0.36 0.30 sfob3412-r25470 47.0 uh ?? 20% 3.12 0.29 0.25 ? testing instrument : 1) inductance : hp 4284a lcr meter 2) dc resistance : hioki m ? hi-tester 3220 ? tested at 100khz, 0.25 vrms. ? saturation rated current (a) : the current when the inductance becomes 10% l ower than its nominal value. (ta=20 ? ) ? temperature rise current (typ.) : the actual current when temperature of co il becomes ?a t=25 ? . (ta=20 ? ) sfob3412 series unshielded type 1.4 1.45 1.45 1.6 1.5 1.0 1.0 1.2 part no. inductance (uh) dc resistance ( ? )max saturation rated current (a) max. temperature rise current (a) max. sfob2813-r594r7 4.7 uh ?? 20% 0.387 (0.298) 1.38 0.59 sfob2813-r446r8 6.8 uh ?? 20% 0.578 (0.445) 0.93 0.44 sfob2813-r38100 10.0 uh ?? 20% 0.811 (0.624) 0.82 0.38 sfob2813-r31150 15.0 uh ?? 20% 1.046 (0.805) 0.67 0.31 sfob2813-r23220 22.0 uh ?? 20% 1.580 (1.216) 0.53 0.23 samwha tecom co., ltd.
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