Surface Mount Power Toroidal Inductor The Surface Mount Power Toroidal Inductors manufactured by Engineered Components Company are designed using stable powdered iron core material. The toroidal core inductor design provides a low external magnetic field and a high core saturation currents. The standard inductance value tolerance is +/-10% when measured at 1 Khz, (IDC=0). Inductance values and Q values are measured on an HP 4284A LCR meter. Since inductance values vary with AC/DC current values, each end application should be evaluated to ensure proper readings. The tabulated current ratings (Rated IDC)are those calculated to cause a 40 deg. C rise in case temperature. These inductors are designed to meet the applicable portions of MIL-C-15305, Grade 1, Class B. The operating temperature range is -55 to +125 deg. C. and the inductors are capable of withstanding 500Vdc @ 50 uA applied between the coil and the case. The inductor and the four phosphor-bronze leads (tin-lead plated) are mounted on a Liquid Crystal Polymer platform, off-white in color, and secured in epoxy resin by utilizing a black Diallyl Phthalate case. Marking, applied by Laser Label, designates one coil termination lead with an indicator dot (see Figure 1). The opposite lead is also a coil temination lead, while the leads at 90 deg. locations are no-connection mounting leads. Product Selection Table PART NUMBER L(uH) SMPT-1.8 1.8 SMPT-2.2 2.2 SMPT-2.7 2.7 SMPT-3.3 3.3 SMPT-3.9 3.9 SMPT-4.7 4.7 SMPT-5.6 5.6 SMPT-6.8 6.8 SMPT-8.2 8.2 SMPT-10 10.0 SMPT-12 12.0 SMPT-15 15.0 SMPT-18 18.0 SMPT-22 22.0 SMPT-27 27.0 SMPT-33 33.0 SMPT-39 39.0 SMPT-47 47.0 SMPT-56 56.0 SMPT-68 68.0 SMPT-82 82.0 SMPT-100 100.0 SMPT-120 120.0 SMPT-150 150.0 SMPT-180 180.0 SMPT-220 220.0 SMPT-270 270.0 SMPT-330 330.0 SMPT-390 390.0 SMPT-470 470.0 SMPT-560 560.0 SMPT-680 680.0 SMPT-820 820.0 SMPT-1000 1000.0 SMPT-1200 1200.0 SMPT-1500 1500.0 SMPT-1800 1800.0 A 0.315 0.315 0.415 0.415 0.415 0.415 0.415 0.415 0.415 0.415 0.470 0.470 0.470 0.570 0.570 0.620 0.620 0.620 0.670 0.670 0.670 0.670 0.820 0.820 0.820 1.070 1.070 1.070 1.188 1.188 1.370 1.370 1.688 1.688 1.875 1.875 1.875 B 0.270 0.270 0.320 0.320 0.320 0.320 0.320 0.320 0.320 0.320 0.340 0.340 0.340 0.390 0.390 0.425 0.425 0.425 0.425 0.425 0.425 0.425 0.485 0.485 0.485 0.530 0.530 0.530 0.670 0.670 0.740 0.740 0.805 0.805 0.835 0.835 0.835 C 0.290 0.290 0.390 0.390 0.390 0.390 0.390 0.390 0.390 0.390 0.445 0.445 0.445 0.545 0.545 0.595 0.595 0.595 0.645 0.645 0.645 0.645 0.795 0.795 0.795 1.045 1.045 1.045 1.163 1.163 1.345 1.345 1.663 1.663 1.850 1.850 1.850 B SMPT-150 YYWW .025 TYP. DATE CODE FULL R. TYP. .050 .070 TYP. A C Figure 1 IDC (amps) readings for % drops DCR(ohms) RATED IDC(amps) 10% DROP IN L 20% DROP IN L 30% DROP IN L 0.02 1.9 0.84 1.39 1.94 0.02 1.8 0.76 1.26 1.75 0.03 2.4 1.43 2.39 3.32 0.03 2.3 1.30 2.16 3.00 0.03 2.2 1.19 1.99 2.76 0.04 2.1 1.09 1.81 2.52 0.04 2.0 0.99 1.66 2.31 0.04 1.9 0.90 1.50 2.09 0.05 1.8 0.82 1.37 1.91 0.05 1.7 0.74 1.24 1.73 0.06 2.0 0.97 1.62 2.26 0.07 1.9 0.87 1.45 2.02 0.07 1.8 0.80 1.33 1.84 0.06 2.3 0.83 1.39 1.93 0.06 2.2 0.75 1.25 1.74 0.08 2.4 0.90 1.50 2.09 0.08 2.3 0.83 1.38 1.92 0.09 2.2 0.75 1.26 1.75 0.11 2.3 0.78 1.29 1.80 0.12 2.1 0.70 1.17 1.63 0.14 2.0 0.64 1.07 1.49 0.15 1.9 0.58 0.97 1.35 0.17 2.2 0.77 1.28 1.77 0.19 2.1 0.68 1.14 1.59 0.20 2.0 0.63 1.04 1.45 0.17 2.8 0.75 1.24 1.73 0.18 2.7 0.67 1.12 1.56 0.20 2.5 0.61 1.01 1.41 0.15 3.6 0.78 1.29 1.80 0.16 3.4 0.71 1.18 1.64 0.19 3.7 0.84 1.40 1.94 0.21 3.5 0.76 1.27 1.76 0.16 4.7 0.83 1.38 1.91 0.18 4.4 0.75 1.25 1.73 0.20 4.7 0.84 1.40 1.95 0.22 4.5 0.75 1.25 1.74 0.25 4.3 0.69 1.14 1.59 Special modules can often be manufactured to provide for customer specific applications. engineered components company A Division of Cornucopia Tool & Plastics, Inc. PO Box 1915, 448 Sherwood Rd., Paso Robles CA 93447 Phone: 805-369-0034 Fax: 805-369-0033 Web: www.ec2.com