Toroidal Inductors High Current CTP4551 CTP4551 is a high current inductor with the following data and features: Three mounting styles are offered: 1 Flying leads (1.00”), for vertical or horizontal mounting. 2 4-pin header, for vertical mounting. 3 Threaded center hole, flying leads (2.00”). • Core type: 1.57” o.d., Iron Powder, perm 33. • Power rating: 4.50 watts for temp. rise 50˚C. • Typical applications: Filter Inductors in Switch Mode Power Supplies. MECHANICAL Style 1 Style 2 1.80 Style 3 1.90 0.85 1.80 0.70 0.85 Thread #10-32 1.80 1.20 0.80 0.90 1.00 2.00 0.50 ELECTRICAL SPECIFICATION CTP4551 Ordering Information: Substitute the style number for the asterisk (*). Example: CTP4551, Style 1, 56uH. Rated Current Amp. RMS I (amp.) @ Lsat. 10% I (amp.) @ Lsat. 50% Part No. Ind. CTP4551 - (uH) DCR Ohms 71.6 65.8 60.0 55.0 171.8 158.0 144.0 131.9 * 17 * 18 * 19 * 20 68 82 100 120 19.9 18.2 16.4 15.0 49.9 45.4 41.1 37.5 119.7 109.0 98.7 90.1 * 21 * 22 * 23 * 24 32.6 31.2 29.7 25.1 13.4 12.3 11.1 10.0 33.6 30.6 27.7 25.0 80.6 73.6 66.5 60.1 * 25 * 26 * 27 * 28 23.9 23.0 19.5 18.7 9.1 8.3 7.6 7.0 22.6 20.8 19.0 17.4 54.3 50.0 45.5 41.7 Part No. Ind. CTP4551 - (uH) DCR Ohms * 01 * 02 * 03 * 04 3.3 3.9 4.7 5.6 0.002 0.002 0.002 0.003 47.2 45.3 43.3 41.5 28.6 26.3 24.0 22.0 * 05 * 06 * 07 * 08 6.8 8.2 10 12 0.003 0.003 0.003 0.004 39.6 37.8 36.0 34.5 * 09 * 10 * 11 * 12 15 18 22 27 0.004 0.005 0.005 0.007 * 13 * 14 * 15 * 16 33 39 47 56 0.008 0.009 0.012 0.013 I (amp.) @ Lsat. 25% An ISO 9001 Registered Company Order: CTP4551 - 116 Rated Current Amp. RMS I (amp.) @ Lsat. 10% I (amp.) @ Lsat. 25% I (amp.) @ Lsat. 50% 0.018 0.020 0.022 0.030 15.9 15.1 14.4 12.3 6.3 5.7 5.2 4.7 15.8 14.4 13.0 11.9 37.8 34.5 31.2 28.5 150 180 220 270 0.033 0.037 0.040 0.045 11.6 11.1 10.5 10.0 4.2 3.9 3.5 3.2 10.6 9.7 8.8 7.9 25.5 23.3 21.0 19.0 330 390 470 560 0.050 0.068 0.074 0.081 9.5 8.2 7.8 7.4 2.9 2.6 2.4 2.2 7.2 6.6 6.0 5.5 17.2 15.8 14.4 13.2 229 Colonnade Road, Nepean, Ontario, Canada K2E 7K3 Tel: (613) 226-1626 Fax: (613) 226-7124 www.filtran.com 32-10