3 dual inductor mode 4 2 1 0.4 (.016) 1.4 (.055) 3.0 (.118) 7.9 (.311) 2 1 3 4 7.6 (.299) max. 7.6 (.299) max. typ. typ. 2.9 (.114) 1.0 (.039) 3.4 0.2 (.134 .008) 2.7 (.106) typ. features multiple applications: parallel, series, dual-inductor and transformer magnetically shielded, low radiation inductance range: 0.33 to 4000 h rated current up to 6.19 a rohs compliant* applications sepic topology power supplies for: - communication equipment - notebooks, desktop computers, servers - lcds, at panels, backlights - camcorders, hdtvs, car audio systems srf0703 series - dual-winding shielded power inductors *rohs directive 2002/95/ec jan. 27, 2003 including annex and rohs recast 2011/65/eu june 8, 2011. speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. test voltage ..................................0.25 v hi-pot .................500 vrms, 3 ma, 3 sec. re ow soldering .. 230 ?; 50 sec. max. operating temperature ................................. -40 ? to +125 ? (temperature rise included) storage temperature .. -40 ? to +125 ? resistance to solder heat ...............................+260 ? for 10 sec. electrical speci cations @ 25 ? bourns part no. parallel rating series rating inductance @ 100 khz l ( h) ?0 % dcr ( ) max. irms (a) isat (a) inductance @ 100 khz l ( h) ?0 % dcr ( ) max. irms (a) isat (a) srf0703-r33m 0.33 0.0092 6.19 14.4 1.32 0.04 3.1 7.18 srf0703-1r0m 1.0 0.0135 5.25 7.97 4 0.072 2.63 3.99 srf0703-1r5m 1.5 0.0191 4.64 6.52 6 0.11 2.32 3.26 srf0703-2r2m 2.2 0.0217 4.11 5.52 8.8 0.132 2.06 2.76 srf0703-3r3m 3.3 0.0316 3.31 4.22 13.2 0.182 1.66 2.11 srf0703-4r7m 4.7 0.0406 3.09 3.78 18.8 0.242 1.55 1.89 srf0703-6r8m 6.8 0.0658 2.55 3.12 27.2 0.285 1.28 1.56 srf0703-8r2m 8.2 0.0772 2.19 2.66 32.8 0.306 1.1 1.33 srf0703-100m 10 0.0826 2.08 2.47 40 0.342 1.04 1.24 srf0703-150m 15 0.119 1.83 2.05 60 0.47 0.916 1.03 srf0703-220m 22 0.15 1.62 1.67 88 0.62 0.811 0.83 srf0703-330m 33 0.24 1.31 1.35 132 1.0 0.653 0.68 srf0703-470m 47 0.338 1.08 1.14 188 1.28 0.542 0.57 srf0703-680m 68 0.507 0.89 0.96 272 1.92 0.444 0.48 srf0703-820m 82 0.61 0.86 0.89 328 2.28 0.43 0.44 srf0703-101m 100 0.715 0.73 0.79 400 2.64 0.367 0.39 SRF0703-151M 150 0.986 0.58 0.65 600 3.63 0.289 0.32 srf0703-221m 220 1.48 0.52 0.53 880 5.5 0.26 0.27 srf0703-331m 330 2.16 0.42 0.44 1320 8.25 0.211 0.22 srf0703-471m 470 2.82 0.35 0.37 1880 11.22 0.173 0.18 srf0703-681m 680 3.96 0.29 0.31 2720 16.17 0.143 0.15 srf0703-821m 820 5.01 0.27 0.28 3280 20.07 0.134 0.14 srf0703-102m 1000 6.11 0.26 0.25 4000 24.42 0.128 0.13 general speci cations core ..............................................ferrite wire ............................enameled copper base ................................................ lcp adhesive .............................. epoxy resin terminal ..............................................sn rated current ............ inductance drops 30 % at isat temperature rise .....40 ? at rated irms packaging ..... 1500 pcs. per 13-inch reel materials product dimensions recommended layout electrical schematic dimensions: mm (inches) n2 2 4 n1 1 3 n2 2 4 n1 1 3 n2 2 4 n1 1 3 parallel series *rohs compliant how to order srf0703 - 100m model value code (see table) 1 2 3 4 series mode 0.4 (.016) 1.4 (.055) 3.0 (.118) 7.9 (.311) 471
user direction of feed 200 (7.87) no component no component components 400 (15.75) start 4.0 (.157) 16.0 (.630) end srf0504 series - line filter packaging speci cations dimensions: mm (inches) qty: 1500 pcs. per reel rev. 05/12 speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. srf0703 series - dual-winding shielded power inductors 18 +0 (.709 +0) 22.4 (.882) 2.0 0.5 (.079 .020) 50.0 -0 (1.97 -0) 330 (12.99) dia. 13.0 ?0.5 (.512 ?.020) dia. 13.0 ?0.5 (.512 ?.020) dia. 21.0 0.8 (.827 .031) 16.0 (.630) asia-paci c: tel: +886-2 2562-4117 ?fax: +886-2 2562-4116 europe: tel: +41-41 768 5555 ?fax: +41-41 768 5510 the americas: tel: +1-951 781-5500 ?fax: +1-951 781-5700 www.bourns.com
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