Document 598-1 SMT Power Inductors MSS1278T Designed for high ambient temperatures Ver y low DCR, excellent current handling Magnetic shielding for high density mounting Designers Kit C419 contains 3 of each value Core material Ferrite Terminations RoHS compliant matte tin over nickel over phos bronze. Other terminations available at additional cost. Weight: 3.8 g 4.6 g Ambient temperature 40C to +125C with Irms current, +125C to +165C with derated current Storage temperature Component: 40C to +165C. Packaging: 40C to +80C Resistance to soldering heat Max three 40 second reflows at +260C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 85% relative humidity) Failures in Time (FIT) / Mean Time Between Failures (MTBF) 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 Packaging 500/13 reel Plastic tape: 24 mm wide, 0.4 mm thick, 16 mm pocket spacing, 8.1 mm pocket depth PCB washing Only pure water or alcohol recommended 3 5 6 1. Please specify termination and packaging codes: DCR Isat (A) Irms (A) SRF 2 (mOhms) 4 Inductance typ 10% 20% 30% 20C 40C MSS1278T-105KLD 1 Part number (H) typ max (MHz) drop drop drop rise rise Termination: L = RoHS compliant matte tin over MSS1278T-102NL 1.0 30% 6.3 7.0 115 31.84 35.04 36.84 7.1 10.1 nickel over phos bronze. MSS1278T-142NL 1.4 30% 8.8 9.8 85 25.04 27.76 29.52 6.8 9.8 Special order: MSS1278T-222NL 2.2 30% 9.4 10.5 60 22.56 24.80 25.96 6.3 9.2 T = RoHS tin-silver-copper MSS1278T-272NL 2.7 30% 10.1 11.3 40 18.76 20.72 22.04 6.1 8.6 (95.5/4/0.5) or S = non-RoHS MSS1278T-392NL 3.9 30% 11.7 13.0 35 16.52 18.24 19.20 5.7 7.7 tin-lead (63/37). MSS1278T-472ML 4.7 20% 13.9 15.5 33 15.30 16.90 17.76 4.3 6.2 Packaging: D = 13 machine-ready reel. EIA-481 MSS1278T-562ML 5.6 20% 15.7 17.5 30 13.38 14.86 15.74 4.3 6.2 embossed plastic tape (500 parts per full reel). MSS1278T-682ML 6.8 20% 19.1 21.3 23 12.10 13.56 14.20 4.2 6.0 B = Less than full reel. In tape, but MSS1278T-822ML 8.2 20% 20.3 22.6 20 11.38 12.60 13.28 4.1 5.9 not machine ready. MSS1278T-103ML 10 20% 21.8 24.3 17 10.62 11.82 12.48 4.0 5.7 To have a leader and trailer MSS1278T-123ML 12 20% 23.2 25.8 15 8.90 9.88 10.44 3.7 5.2 added ( 25 charge), use code MSS1278T-153ML 15 20% 27.9 31.0 13 8.36 9.32 9.94 3.5 4.9 letter D instead. MSS1278T-183ML 18 20% 30.8 34.3 12 8.00 8.88 9.36 3.0 4.5 2. Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc using MSS1278T-223ML 22 20% 35.5 39.5 11 7.08 7.88 8.34 2.9 4.0 an Agilent/HP 4263B LCR meter or equivalent. MSS1278T-273ML 27 20% 45.0 50.0 10 6.32 7.08 7.54 2.6 3.6 3. DCR measured on a micro-ohmmeter and a MSS1278T-333ML 33 20% 61.9 68.8 9.5 5.96 6.56 6.98 2.3 3.1 Coilcraft CCF858 test fixture. MSS1278T-393ML 39 20% 69.1 76.8 8.5 5.38 5.94 6.28 2.1 3.0 4. SRF measured using an Agilent/HP 8753D net- MSS1278T-473ML 47 20% 72.3 80.4 7.5 4.76 5.40 5.66 2.0 2.9 work analyzer and a Coilcraft SMD -D test fixture. MSS1278T-563ML 56 20% 80.2 89.2 7.0 4.40 4.98 5.30 1.9 2.7 5. DC current at which the inductance drops the MSS1278T-683ML 68 20% 91.3 101.5 6.5 3.92 4.46 4.74 1.8 2.6 specified amount from its value without current. MSS1278T-823ML 82 20% 125.9 139.9 5.0 3.66 4.08 4.38 1.6 2.3 6. Current that causes the specified temperature rise MSS1278T-104ML 100 20% 135.1 150.2 4.5 3.12 3.56 3.78 1.5 2.2 from 25C ambient. MSS1278T-124KL 120 10% 182.3 202.6 4.3 3.02 3.36 3.58 1.4 1.9 7. Electrical specifications at 25C. MSS1278T-154KL 150 10% 216.5 240.6 4.1 2.60 2.94 3.10 1.3 1.8 Refer to Doc 362 Soldering Surface Mount Compo- MSS1278T-184KL 180 10% 229.0 254.5 4.0 2.36 2.68 2.84 1.2 1.7 nents before soldering. MSS1278T-224KL 220 10% 323.6 359.6 3.4 2.24 2.50 2.62 1.0 1.6 MSS1278T-274KL 270 10% 415.6 461.8 3.1 1.94 2.18 2.34 0.90 1.2 MSS1278T-334KL 330 10% 487.3 541.5 2.9 1.72 1.92 2.06 0.80 1.0 MSS1278T-394KL 390 10% 533.6 592.9 2.7 1.62 1.82 1.92 0.75 1.0 MSS1278T-474KL 470 10% 707.5 786.2 2.2 1.44 1.64 1.74 0.66 0.90 MSS1278T-564KL 560 10% 777.4 863.8 2.0 1.40 1.54 1.66 0.60 0.80 MSS1278T-684KL 680 10% 1045 1162 1.7 1.24 1.32 1.46 0.55 0.75 MSS1278T-824KL 820 10% 1166 1296 1.4 1.14 1.28 1.42 0.50 0.70 MSS1278T-105KL 1000 10% 1334 1482 1.3 0.982 1.08 1.18 0.48 0.68 Document 598-1 Revised 08/18/11 HIGH TEMPERATUREDocument 598-2 SMT Power Inductors MSS1278T Series Typical L vs Frequency Typical L vs Current 10000 10000 1000 H 1000 H 1000 1000 100 H 100 H 100 100 10 H 10 H 10 10 1 H 1 H 1 1 0.1 0.1 0.01 0.1 1 10 0.1 1 10 100 Frequency (MHz) Current (A) Current Derating 120 110 100 90 80 70 60 50 40 30 20 Isat 10 Irms 0 -40 -20 020406080 100 120 140 160 180 Ambient temperature (C) inches Dimensions are in mm Document 598-2 Revised 08/18/11 HIGH TEMPERATURE Inductance (H) Percent of rated Current 25C Inductance (H)