SMT TOROIDS POWER CHOKES SMT ST1/ST2/ST3/ST4 TYPE *9Shape and size : ( Dimensions are in mm ) Features : Ordering information : Higher Frequency. High Saturation Material . SMT ST1 (1) (2) - 100 M (3) (4) Low EMI Radiation. (1) Type : Surface Mounting Type. Low DC Resistance. (2) Style : Base size . Inductor more versatile inductance combination by (3)Inductance : Example : 100 for 10.0 uH. series or parallel connections . (4)Inductance tolerance : "M" : 20% Inductance and rated current ranges : Characteristics : SMTST1/P PARALLEL&SERIES 0.47~300uH Open Circuit Inductance Test Parameters:100KHZ . SMTST2/P PARALLEL&SERIES 0.47~300uH SMTST3/P PARALLEL&SERIES 0.47~300uH Turns Ratio: (1-2) : ( 4-3) 1:1 SMTST4/P PARALLEL&SERIES 0.47~300uH Legend: Test equipment : 0.25Vrms, 0.0Adc Parallel:(1,4-3,2)Series:(1-3)tie(2-4) No suffix is OCTA-PAC L : HP4284A LCR meter P suffix is ECONO-PAC DCR : Milli-ohm meter. Applications : Computer and portable power devices Environmental Data Inductor: DC-DC Converters . Storage temperature range :-40 to +125 Isolation/Coupling ( Transformer ) . Operating ambient temperature range:-40 to +105 Noise filtering and filter chokes . Infrared reflow temperature : +240 for 30 seconds. Buck , boost, forward, and resonant converters. maximum LCD panels, DVD players . 27.1 SMT TOROIDS POWER CHOKES SMT ST1/ST2 TYPE PARALLEL SERIES Open Circuit Full Load Full Load DC Open Circuit Full Load Full Load DC Inductance Current Inductance Resistance Inductance Current Inductance Resistance uH 20% Adc uH Min. ohms Max. uH 20% Adc uH Min. ohms Max. SMTST1-R47M 0.40 5.50 0.26 0.005 1.60 2.75 1.05 0.020 SMTST1-R68M 0.63 4.50 0.41 0.006 2.50 2.25 1.63 0.024 SMTST1-1R0M 0.90 4.20 0.56 0.007 3.60 2.10 2.24 0.028 SMTST1-2R0M 2.03 4.10 1.00 0.010 8.10 2.05 4.01 0.040 SMTST1-5R0M 4.90 2.30 2.66 0.030 19.60 1.15 10.64 0.122 SMTST1-8R0M 8.10 2.00 4.08 0.039 32.40 1.00 16.34 0.157 SMTST1-100M 10.00 1.90 4.85 0.044 40.00 0.95 19.40 0.176 SMTST1-150M 14.40 1.10 8.74 0.080 57.60 0.55 34.96 0.319 SMTST1-200M 19.60 1.00 11.54 0.146 78.40 0.50 46.15 0.583 SMTST1-250M 25.60 0.74 16.35 0.167 102.40 0.37 65.42 0.668 SMTST1-330M 32.40 0.72 19.84 0.293 129.60 0.36 79.37 1.171 SMTST1-500M 50.63 0.64 29.34 0.365 202.50 0.32 117.38 1.461 SMTST1-680M 67.60 0.54 39.73 0.516 270.40 0.27 158.92 2.064 SMTST1-101M 99.23 0.44 58.72 0.784 396.90 0.22 234.88 3.137 SMTST1-151M 148.23 0.38 85.16 0.965 592.90 0.19 340.64 3.861 SMTST1-201M 202.50 0.37 107.60 1.142 810.00 0.19 430.39 4.567 SMTST1-301M 302.50 0.22 191.38 1.431 1210.00 0.11 765.54 5.724 SMTST2-R47M 0.42 6.50 0.290 0.005 1.69 3.25 1.17 0.019 SMTST2-R68M 0.75 5.50 0.500 0.006 3.01 2.75 1.98 0.024 SMTST2-1R0M 1.18 4.60 0.760 0.007 4.70 2.30 3.04 0.028 SMTST2-2R0M 2.3 4.50 1.270 0.010 9.21 2.25 5.07 0.038 SMTST2-5R0M 4.7 3.00 2.660 0.021 18.80 1.50 10.65 0.084 SMTST2-8R0M 7.94 2.60 4.180 0.027 31.77 1.30 16.72 0.108 SMTST2-100M 10.58 2.50 5.180 0.043 42.30 1.25 20.72 0.172 SMTST2-150M 15.23 1.70 8.530 0.059 60.91 0.85 34.10 0.236 SMTST2-200M 20.73 1.30 12.360 0.107 82.91 0.65 49.46 0.426 SMTST2-250M 24.86 1.00 16.090 0.117 99.45 0.50 64.35 0.466 SMTST2-330M 31.77 1.40 15.900 0.105 127.09 0.70 63.59 0.420 SMTST2-500M 51.18 0.92 28.790 0.210 204.73 0.46 115.16 0.839 SMTST2-680M 67.87 0.78 38.710 0.303 271.47 0.39 154.83 1.214 SMTST2-101M 99.45 0.63 57.450 0.457 397.81 0.32 229.79 1.828 SMTST2-151M 147.39 0.43 93.460 0.560 589.57 0.22 373.84 2.241 SMTST2-201M 198.58 0.39 122.940 0.796 794.30 0.20 491.76 3.184 SMTST2-301M 300.8 0.38 169.060 1.231 1203.20 0.19 676.24 4.929 Part No. 27.2 SMT TOROIDS POWER CHOKES SMTST3/ST4 TYPE Part No. Open Circuit PARALLEL Full Load Full Load SERIES Full Load Full Load DC Open Circuit Inductance Resistance Inductance Current uH ohms Max. uH 20% Adc Inductance Current uH 20% Adc SMTST3-R47M 0.38 6.00 0.27 0.005 1.54 3.00 1.08 0.020 SMTST3-R68M 0.60 5.00 0.42 0.006 2.40 2.50 1.67 0.024 SMTST3-1R0M 0.86 4.80 0.57 0.007 3.46 2.40 2.28 0.028 SMTST3-2R0M 1.94 4.70 1.05 0.010 7.78 2.35 4.22 0.040 SMTST3-5R0M 4.70 3.00 2.56 0.019 18.82 1.50 10.26 0.077 SMTST3-8R0M 7.78 2.80 3.74 0.025 31.10 1.40 14.98 0.099 SMTST3100M 9.60 2.70 4.38 0.028 38.40 1.35 17.54 0.111 SMTST3-150M 15.00 2.00 7.26 0.043 60.00 1.00 29.06 0.172 SMTST3-200M 20.18 1.50 10.76 0.078 80.74 0.75 43.04 0.312 SMTST3-250M 24.58 0.98 15.64 0.086 98.30 0.49 62.56 0.346 SMTST3-330M 32.86 0.96 19.69 0.083 131.42 0.48 78.77 0.331 SMTST3-500M 50.78 0.94 27.18 0.239 203.14 0.47 108.71 0.956 SMTST3-680M 67.42 0.80 36.53 0.277 269.66 0.40 146.11 1.109 SMTST3-101M 101.40 0.70 52.48 0.345 405.60 0.35 209.93 1.381 SMTST3-151M 149.78 0.38 97.16 0.430 599.14 0.19 388.63 1.718 SMTST3-201M 198.74 0.39 119.18 0.619 794.98 0.20 476.71 2.475 SMTST3-301M 301.06 0.40 157.44 0.951 1204.22 0.20 629.75 3.083 SMTST4-R47M 0.44 7.00 0.320 0.004 1.76 3.50 1.29 0.016 SMTST4-R68M 0.78 6.00 0.550 0.005 3.14 3.00 2.21 0.020 SMTST4-1R0M 1.23 5.00 0.850 0.006 4.90 2.50 3.41 0.024 SMTST4-2R0M 1.76 4.90 1.060 0.007 7.06 2.45 4.24 0.028 SMTST4-5R0M 4.9 4.40 2.590 0.014 19.60 2.20 10.37 0.056 SMTST4-8R0M 8.28 3.50 4.290 0.018 33.12 1.75 17.14 0.072 SMTST4-100M 9.6 3.40 4.820 0.019 38.42 1.70 19.28 0.078 SMTST4-150M 14.16 3.00 6.760 0.024 56.64 1.50 27.03 0.096 SMTST4-200M 19.6 2.10 10.680 0.055 78.40 1.05 42.73 0.220 SMTST4-250M 25.92 2.00 13.320 0.063 103.68 1.00 53.27 0.253 SMTST4-330M 33.12 1.80 16.820 0.072 132.50 0.90 67.27 0.287 SMTST4-500M 50.18 1.50 25.030 0.111 200.70 0.75 100.11 0.443 SMTST4-680M 67.08 1.20 35.290 0.157 268.32 0.60 141.15 0.630 SMTST4-101M 99.23 0.92 54.560 0.302 396.90 0.46 218.25 1.210 SMTST4-151M 148.23 0.82 77.170 0.372 592.90 0.41 308.69 1.488 SMTST4-201M 200.7 0.64 111.080 0.545 802.82 0.32 444.32 2.180 SMTST4-301M 298.12 0.62 147.920 0.672 1192.46 0.31 591.66 2.687 Min. 27.3 Inductance DC uH Min. Resistance ohms Max. SMT TOROIDS POWER CHOKES SMT ST1P/ST2P TYPE Part No. Open Circuit PARALLEL Full Load Full Load DC Open Circuit SERIES Full Load Full Load DC Inductance Current Inductance Resistance Inductance Current Inductance Resistance uH 20% Adc uH Min. ohms Max. uH 20% Adc uH Min. ohms Max. SMTST1P-R47M 0.42 5.50 0.31 0.005 1.67 2.75 1.25 0.021 SMTST1P-R68M 0.60 5.10 0.43 0.006 2.40 2.55 1.74 0.025 SMTST1P-1R0M 1.07 4.50 0.73 0.008 4.28 2.25 2.92 0.032 SMTST1P-2R0M 2.02 3.40 1.36 0.013 8.08 1.70 5.44 0.054 SMTST1P-5R0M 4.83 2.00 3.37 0.040 19.31 1.00 13.47 0.161 SMTST1P-8R0M 8.08 1.80 5.31 0.052 32.33 0.90 21.23 0.207 SMTST1P-100M 9.62 1.70 6.23 0.057 38.48 0.85 24.94 0.227 SMTST1P-150M 15.03 1.40 9.62 0.087 60.12 0.70 38.47 0.348 SMTST1P-200M 20.46 1.00 14.12 0.158 81.83 0.50 56.47 0.634 SMTST1P-250M 25.40 0.96 17.07 0.177 101.60 0.48 68.29 0.708 SMTST1P-330M 32.33 0.80 22.27 0.250 129.32 0.40 89.06 1.001 SMTST1P-500M 50.52 0.70 33.57 0.316 202.07 0.35 134.27 1.263 SMTST1P-680M 68.40 0.66 43.65 0.373 273.61 0.33 174.61 1.490 SMTST1P-101M 99.01 0.54 63.64 0.557 396.06 0.27 254.55 2.227 SMTST1P-151M 150.72 0.44 96.64 0.844 602.87 0.22 386.56 3.376 SMTST1P-201M 198.41 0.36 130.79 1.208 793.65 0.18 523.16 4.831 SMTST1P-301M 299.87 0.32 190.05 1.525 1199.46 0.16 760.19 6.100 SMTST2P-R47M 0.54 5.90 0.420 0.006 2.18 2.95 1.69 0.024 SMTST2P-R68M 0.85 5.40 0.640 0.007 3.40 2.70 2.55 0.029 SMTST2P-1R0M 1.22 5.00 0.890 0.008 4.90 2.50 3.57 0.033 SMTST2P-2R0M 2.18 3.90 1.560 0.018 8.70 1.95 6.26 0.070 SMTST2P-5R0M 4.9 2.50 3.570 0.032 19.58 1.25 14.26 0.128 SMTST2P-8R0M 7.65 2.30 5.310 0.040 30.60 1.15 21.23 0.158 SMTST2P-100M 9.83 2.10 6.730 0.045 39.30 1.05 26.92 0.179 SMTST2P-150M 14.99 1.60 10.510 0.085 59.98 0.80 42.02 0.339 SMTST2P-200M 19.58 1.50 13.370 0.097 78.34 0.75 53.48 0.387 SMTST2P-250M 24.79 1.40 16.600 0.109 99.14 0.70 66.38 0.436 SMTST2P-330M 32.67 1.30 21.290 0.126 130.70 0.65 85.17 0.503 SMTST2P-500M 49.1 0.82 35.310 0.305 196.38 0.41 141.24 1.221 SMTST2P-680M 68.85 0.76 47.930 0.362 275.40 0.38 191.71 1.445 SMTST2P-101M 99.14 0.62 69.560 0.541 396.58 0.31 278.22 2.162 SMTST2P-151M 148.1 0.56 100.070 0.665 592.42 0.28 400.27 2.660 SMTST2P-201M 201.59 0.46 138.490 0.951 806.34 0.23 553.97 3.804 SMTST2P-301M 300.42 0.42 197.520 1.176 1201.70 0.21 790.08 4.703 27.4 SMT TOROIDS POWER CHOKES SMT ST3P/ST4P TYPE Part No. Open Circuit PARALLEL Full Load Full Load SERIES Full Load Full Load DC Open Circuit Inductance Resistance Inductance Current uH ohms Max. uH 20% Adc Inductance Current uH 20% Adc SMTST3P-R47M 0.46 6.20 0.35 0.006 1.85 3.10 1.42 0.025 SMTST3P-R68M 0.67 5.70 0.50 0.007 2.66 2.85 1.98 0.028 SMTST3P-1R0M 0.91 5.40 0.65 0.008 3.63 2.70 2.62 0.032 SMTST3P-2R0M 1.85 4.60 1.24 0.011 7.40 2.30 4.97 0.045 SMTST3P-5R0M 4.74 3.20 3.04 0.022 18.91 1.60 12.15 0.090 SMTST3P-8R0M 8.16 2.80 4.90 0.030 32.63 1.40 19.60 0.119 SMTST3P-100M 9.79 2.70 5.71 0.033 39.15 1.35 22.85 0.131 SMTST3P-150M 14.50 2.20 8.50 0.050 58.02 1.10 34.01 0.198 SMTST3P-200M 20.15 1.50 13.12 0.111 80.59 0.75 52.48 0.443 SMTST3P-250M 25.33 1.40 16.16 0.125 101.31 0.70 64.66 0.499 SMTST3P-330M 32.63 1.30 20.32 0.146 130.54 0.65 81.30 0.571 SMTST3P-500M 50.02 0.92 33.06 0.277 200.10 0.46 132.24 1.108 SMTST3P-680M 68.84 0.84 44.15 0.328 275.35 0.42 176.61 1.312 SMTST3P-101M 101.31 0.68 65.50 0.501 405.22 0.34 262.02 2.005 SMTST3P-151M 149.85 0.64 90.92 0.621 599.40 0.32 363.68 2.483 SMTST3P-201M 200.10 0.60 116.51 0.731 800.38 0.30 466.03 2.925 SMTST3P-301M 298.39 0.50 172.12 0.926 1193.55 0.25 688.50 3.702 SMTST4P-R47M 0.49 7.90 0.37 0.005 1.95 3.95 1.49 0.019 SMTST4P-R68M 0.76 7.20 0.56 0.006 3.05 3.60 2.24 0.023 SMTST4P-1R0M 1.1 5.90 0.81 0.008 4.39 2.95 3.24 0.033 SMTST4P-2R0M 1.95 4.60 1.42 0.014 7.81 2.30 5.69 0.055 SMTST4P-5R0M 5.15 3.30 3.56 0.027 20.62 1.65 14.23 0.107 SMTST4P-8R0M 7.81 3.00 5.15 0.033 31.23 1.50 20.61 0.131 SMTST4P-100M 9.88 2.50 6.70 0.047 39.53 1.25 26.79 0.187 SMTST4P-150M 14.76 2.30 9.52 0.057 59.05 1.15 38.09 0.228 SMTST4P-200M 20.62 1.90 13.44 0.084 82.47 0.95 53.76 0.337 SMTST4P-250M 25.65 1.60 17.17 0.115 102.60 0.80 68.68 0.461 SMTST4P-330M 33.21 1.30 22.93 0.166 132.86 0.65 91.72 0.662 SMTST4P-500M 48.8 1.20 32.21 0.201 195.20 0.60 128.83 0.805 SMTST4P-680M 67.37 1.10 43.04 0.238 269.50 0.55 172.16 0.952 SMTST4P-101M 99.09 0.72 69.54 0.565 396.38 0.36 278.15 2.259 SMTST4P-151M 149.45 0.64 101.46 0.696 597.80 0.32 405.83 2.784 SMTST4P-201M 200.11 0.60 131.37 0.810 800.44 0.30 525.47 3.240 SMTST4P-301M 298.93 0.54 188.03 1.003 1195.72 0.27 752.13 4.011 Min. 27.5 Inductance DC uH Min. Resistance ohms Max.