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| MODEL HM74 SERIES High Frequency High Current Low Profile Surface Mount Inductors FEATURES AND BENEFITS NEW PRODUCT * * * * * * Closed magnetic circuit for high density board assembly High performance, low loss ferrite core up to 5 MHz Low profile designed for machine placement Low DCR and high current up to 27 amps continuous Class F design is compatible with vapor phase and infrared reflow soldering Custom designs available APPLICATIONS * Laptop and notebook computers * DC/DC converters in distributed power systems or VRM applications * Inductor for general purpose use ELECTRICAL / ENVIRONMENTAL Operating Temperature Range Storage Temperature Range Ambient Temperature, Maximum Insulation System Specifications subject to change without notice. -25C to +135C -40C to +85C 80C Class F, 155C 6 6-121 Model HM74 Series SPECIFICATIONS Part Number HM74-R47 HM74-R85 HM74-1R4 HM74-2R1 HM74-3R0 HM74-4R0 HM74-5R1 HM74-6R3 Inductance (1) Nominal H 20% 0.47 0.85 1.40 2.10 3.00 4.00 5.10 6.30 Rated (2) DC Current Amps 26.0 19.0 14.5 12.5 8.0 7.5 7.0 6.5 DC Resistance m Max. 1.1 2.1 3.6 4.4 11.9 13.7 15.5 17.2 DC (3) Resistance m Typ. 0.9 1.8 3.0 3.7 9.9 11.4 12.9 14.3 Notes: (1) Inductance measured at 100kHz, 0.25V without DC current. (2) Rated DC current is the approximate current at which inductance will be decreased by 20% from its initial (zero DC) value or the DC current at which T = 50C, whichever is lower. (3) DC resistance measured at 20C. ORDERING INFORMATION HM74 Model Series 1RO TR Packaging Option: TB = Tubes (32 Units /Tube) TR = Tape & 13" Reel (250 Units /Reel) Inductance Code: First two digits are significant. Last digit denotes number of trailing zeros. Values below 10H "R" denotes decimal point. 6-122 Model HM74 Series OUTLINE DIMENSIONS (Inch/mm) .583 Max. 14.8 Recommended Solder Pad Layout Top View .173 4.40 .622 15.8 Max. .276 7.00 .449 11.40 .173 4.40 .197 Max. 5.0 .472 12.00 6 6-123 Model HM74 Series |
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