? all specifications are subject to change without notice. (1/1) 001-01 / 20010914 / e9831_sf.fm emc components sf series differential mode choke coils for signal line and dc power line axial varnished and taped type for large current features the sf series chokes feature cores with high saturation mag- netic flux density. they thereby provide an effective means of combating pluse emc. by using an advanced amorphous metal alloy core, the sf series are able to provide line noise attenuation performance equivalent to conventional ferrite-based chokes but with far more compact dimensions and fewer coil turns. they can thus be implemented in high-density circuit configurations to comply with various emc-related regulations. typical characteristics of sf core shapes and dimensions/electrical characteristics ? 1 lcr meter: yhp4261a, 1khz(l 190h:70ma, l>190h:10ma) ? 2 pew (grade 1) please contact us, when specifying dimensions of the center hole for the coil. when coil temperature exceeds 100c, please use forced cooling as well (sf-hp-20a-01, SF-HP-30A-01, sf-hp-40a-01, sf-hp-60a-01 ). i[300khz] 75 tan /i[300khz] 3 10 ?3 applicable frequency 10mhz max. temperature stability[ ?20 to +60c] 5.2% bs[24ka/m] 1400mt part no. rated current (a)max. inductance ? 1 (h)min. dc resistance (m ? )max. shape diameter of winding wire ? 2 ?(mm) dimensions(mm) weight (g) d max. h max. l sf-hp-20a-01 20 60 15 sf-t36(1piece) 1.8 2 70 28 505 230 SF-HP-30A-01 30 60 10 sf-t36(2piece) 1.8 3 72 43 505 420 sf-hp-40a-01 40 60 10 sf-t36(3piece) 1.8 3 72 60 505 670 sf-hp-60a-01 60 60 10 sf-t36(3piece) 2 3 72 60 505 760 d h 30max. l dimensions in mm
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