Toroidal Inductors Medium Current CTP4557 CTP4557 is a medium 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., Moly-Permalloy Powder, perm 60. • Power rating: 4.50 watts for temp. rise 50˚C. • Typical applications: Switching 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 CTP4557 Ordering Information: Substitute the style number for the asterisk (*). Example: CTP4557, Style 1, 56uH. Rated Current Amp. RMS I (amp.) @ Lsat. 10% I (amp.) @ Lsat. 50% Part No. Ind. CTP4557 - (uH) DCR Ohms 73.6 67.7 61.7 56.5 122.7 112.8 102.8 94.2 * 17 * 18 * 19 * 20 68 82 100 120 30.8 28.0 25.4 23.2 51.3 46.7 42.3 38.6 85.5 77.8 70.5 64.3 * 21 * 22 * 23 * 24 37.3 31.8 30.2 28.8 20.7 18.9 17.1 15.4 34.5 31.5 28.5 25.7 57.5 52.5 47.5 42.9 24.4 23.4 19.9 19.1 14.0 12.8 11.7 10.7 23.3 21.4 19.5 17.9 38.8 35.7 32.5 29.8 Part No. Ind. CTP4557 - (uH) DCR Ohms * 01 * 02 * 03 * 04 3.3 3.9 4.7 5.6 0.002 0.002 0.002 0.002 53.8 51.7 49.4 47.4 44.2 40.6 37.0 33.9 * 05 * 06 * 07 * 08 6.8 8.2 10 12 0.002 0.002 0.003 0.003 45.2 43.2 41.2 39.4 * 09 * 10 * 11 * 12 15 18 22 27 0.003 0.004 0.005 0.005 * 13 * 14 * 15 * 16 33 39 47 56 0.008 0.008 0.011 0.012 I (amp.) @ Lsat. 25% An ISO 9001 Registered Company Order: CTP4557 - 116 Rated Current Amp. RMS I (amp.) @ Lsat. 10% I (amp.) @ Lsat. 25% I (amp.) @ Lsat. 50% 0.017 0.019 0.021 0.023 16.2 15.4 14.7 14.0 9.7 8.9 8.0 7.3 16.2 14.8 13.4 12.2 27.0 24.6 22.3 20.3 150 180 220 270 0.032 0.035 0.049 0.054 11.8 11.3 9.6 9.1 6.6 6.0 5.4 4.9 10.9 10.0 9.0 8.1 18.2 16.6 15.0 13.6 * 25 * 26 * 27 * 28 330 390 470 560 0.060 0.065 0.072 0.078 8.7 8.3 7.9 7.6 4.4 4.1 3.7 3.4 7.4 6.8 6.2 5.7 12.3 11.3 10.3 9.4 * 29 * 30 * 31 * 32 680 820 1000 1200 0.086 0.094 0.131 0.181 7.2 6.9 5.9 5.0 3.1 2.8 2.5 2.3 5.1 4.7 4.2 3.9 8.5 7.8 7.0 6.4 229 Colonnade Road, Nepean, Ontario, Canada K2E 7K3 Tel: (613) 226-1626 Fax: (613) 226-7124 www.filtran.com 33-6