NT IA PL M CO S oH *R Features Applications ■ Height of 3.0 mm max. ■ Input/output of DC/DC converters ■ Current rating up to 3.1 A ■ Power supplies for: • Portable communication equipment • Camcorders • LCD TVs • Car radios ■ RoHS compliant* SRR4028 Series - Shielded SMD Power Inductors Electrical Specifications Inductance 100 kHz µH) (µ Tol. % Q Ref. 1.2 1.8 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2 10 12 15 18 22 27 33 39 47 56 68 82 100 120 150 180 220 270 330 390 470 560 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 ±30 9.34 9.18 9.24 8.64 7.72 8.58 8.12 9.56 9.624 8.24 11.26 11.26 9.66 11.64 8.26 10.76 9.7 9.74 10.88 9 8.42 8.6 8.78 13.32 11.72 13.86 11.3 17.46 16.48 13.18 13.26 16.46 Bourns Part No. SRR4028-1R2Y SRR4028-1R8Y SRR4028-2R2Y SRR4028-2R7Y SRR4028-3R3Y SRR4028-3R9Y SRR4028-4R7Y SRR4028-5R6Y SRR4028-6R8Y SRR4028-8R2Y SRR4028-100Y SRR4028-120Y SRR4028-150Y SRR4028-180Y SRR4028-220Y SRR4028-270Y SRR4028-330Y SRR4028-390Y SRR4028-470Y SRR4028-560Y SRR4028-680Y SRR4028-820Y SRR4028-101Y SRR4028-121Y SRR4028-151Y SRR4028-181Y SRR4028-221Y SRR4028-271Y SRR4028-331Y SRR4028-391Y SRR4028-471Y SRR4028-561Y Test Frequency (MHz) SRF Typ. (MHz) DCR Max. Ω) (mΩ Irms (A) Isat (A) 7.96 7.96 7.96 7.96 7.96 7.96 7.96 7.96 7.96 7.96 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 0.796 0.796 0.796 0.796 0.796 0.796 0.796 0.796 0.796 0.796 176 146 111 92 76 56 55 69 77 45 34 25 27 25 23 18 16 14 13 13 11 8 9 8 6 7 5 5 5 4 3 3 20 25 28 30 35 60 70 85 90 100 110 125 150 160 185 200 230 250 280 320 400 520 600 700 860 1000 1250 1500 1700 2200 2600 3000 3.10 2.70 2.50 2.35 2.15 1.72 1.55 1.38 1.30 1.25 1.19 1.12 1.03 0.98 0.93 0.89 0.82 0.80 0.75 0.70 0.63 0.56 0.51 0.47 0.42 0.39 0.34 0.32 0.30 0.26 0.24 0.22 2.560 2.200 2.050 1.800 1.650 1.500 1.300 1.200 1.150 1.050 1.000 0.850 0.780 0.750 0.720 0.600 0.580 0.500 0.480 0.410 0.360 0.320 0.300 0.280 0.260 0.230 0.200 0.180 0.170 0.160 0.155 0.150 General Specifications Test Voltage .....................0.1 V, 100 KHz Reflow Soldering .....230 ˚C; 50 sec max. Operating Temperature ..-40 °C to +125 °C (Temperature rise included) Storage Temperature..-40 °C to +125 °C Resistance to Soldering Heat ................................260 °C for 10 sec. Materials Core Material.................................Ferrite Wire ............................Enameled Copper Adhesive..............................Epoxy Resin Terminal.....................................Ag/Ni/Sn Rated Current .........Ind. drop of 35 % typ. at Isat Temperature Rise .............30 ˚C typ. at Irms Packaging.....................500 pcs. per reel Product Dimensions 4.80 ± 0.20 (.189 ± .008) 6R8 2.80 ± 0.20 (.110 ± .008) 1.60 (.063) TYP. TYP. 1.60 (.063) 1.60 (.063) TYP. Soldering Profile 275 <1> Maximum of 10 seconds between +255°C and +260°C 260°C peak <1> 255°C Recommended Layout 225 5.30 REF. (.209) 220°C 190°C Temperature (°C) 4.80 ± 0.20 (.189 ± .008) Ramp Down 6°C/second maximum 60 - 90 seconds 175 2.00 (.079) REF. 150°C R 125 120 - 150 seconds 1.80 (.071) REF. 10 seconds minimum 75 Ramp Up 3°C/second maximum DIMENSIONS: MM (INCHES) REF. 1.50 (.059) 2.00 (.079) REF. 25 0 50 100 150 Time (seconds) 200 250 300 Rev. 02/22/05 *RoHS Directive 2002/95/EC Jan 27 2003 including Annex Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. Surface Mount Chip-Inductor Capability MatrixInductors SRR4028 Series Shielded SMD Power Inductance vs. Current Electrical Schematic 7 5 561 3 Inductance (µH) 2 151 102 7 5 3 330 2 101 7 100 5 4R7 3 LCR METER 2 100 1R2 7 101 2 3 7 102 5 2 3 5 7 103 2 3 5 7 104 DC Current (mA) Packaging Specifications 2.0 ± 0.5 (.079 ± .020) 178.0 (7.00) DIA. DIMENSIONS: 16.5 (.650) MM (INCHES) DIA. 13.0 (.511) 21.0 ± 0.8 (.827 ± .032) 50.0 - 0 (1.969 - 0) 13.0 DIA. (.511) 14.0 + 0 (.551 + 0) 8.0 (.315) END 6R8 4.0 (.157) 6R8 6R8 NO COMPONENT START 6R8 NO COMPONENT 200 (7.87) COMPONENTS USER DIRECTION OF FEED QTY: 500 PCS. PER REEL 08/07 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. 400 (15.75)