Document 598-1 RE U T A R E P M E T HIGH SMT Power Inductors – MSS1278T • Designed for high ambient temperatures • Very low DCR, excellent current handling • Magnetic shielding for high density mounting Designer’s 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 –40°C to +125°C with Irms current, +125°C to +165°C with derated current Storage temperature Component: –40°C to +165°C. Packaging: –40°C to +80°C Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 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 DCR3 SRF (mOhms) Inductance2 typ4 Part number1 (µH) typ max (MHz) MSS1278T-102NL_ 1.0 ±30% 6.3 7.0 115 MSS1278T-142NL_ 1.4 ±30% 8.8 9.8 85 MSS1278T-222NL_ 2.2 ±30% 9.4 10.5 60 MSS1278T-272NL_ 2.7 ±30% 10.1 11.3 40 MSS1278T-392NL_ 3.9 ±30% 11.7 13.0 35 MSS1278T-472ML_ 4.7 ±20% 13.9 15.5 33 MSS1278T-562ML_ 5.6 ±20% 15.7 17.5 30 MSS1278T-682ML_ 6.8 ±20% 19.1 21.3 23 MSS1278T-822ML_ 8.2 ±20% 20.3 22.6 20 MSS1278T-103ML_ 10 ±20% 21.8 24.3 17 MSS1278T-123ML_ 12 ±20% 23.2 25.8 15 MSS1278T-153ML_ 15 ±20% 27.9 31.0 13 MSS1278T-183ML_ 18 ±20% 30.8 34.3 12 MSS1278T-223ML_ 22 ±20% 35.5 39.5 11 MSS1278T-273ML_ 27 ±20% 45.0 50.0 10 MSS1278T-333ML_ 33 ±20% 61.9 68.8 9.5 MSS1278T-393ML_ 39 ±20% 69.1 76.8 8.5 MSS1278T-473ML_ 47 ±20% 72.3 80.4 7.5 MSS1278T-563ML_ 56 ±20% 80.2 89.2 7.0 MSS1278T-683ML_ 68 ±20% 91.3 101.5 6.5 MSS1278T-823ML_ 82 ±20% 125.9 139.9 5.0 MSS1278T-104ML_ 100 ±20% 135.1 150.2 4.5 MSS1278T-124KL_ 120 ±10% 182.3 202.6 4.3 MSS1278T-154KL_ 150 ±10% 216.5 240.6 4.1 MSS1278T-184KL_ 180 ±10% 229.0 254.5 4.0 MSS1278T-224KL_ 220 ±10% 323.6 359.6 3.4 MSS1278T-274KL_ 270 ±10% 415.6 461.8 3.1 MSS1278T-334KL_ 330 ±10% 487.3 541.5 2.9 MSS1278T-394KL_ 390 ±10% 533.6 592.9 2.7 MSS1278T-474KL_ 470 ±10% 707.5 786.2 2.2 MSS1278T-564KL_ 560 ±10% 777.4 863.8 2.0 MSS1278T-684KL_ 680 ±10% 1045 1162 1.7 MSS1278T-824KL_ 820 ±10% 1166 1296 1.4 MSS1278T-105KL_ 1000 ±10% 1334 1482 1.3 Isat (A)5 Irms (A)6 10% 20% 30% 20°C 40°C drop drop drop rise rise 31.84 35.04 36.84 7.1 10.1 25.04 27.76 29.52 6.8 9.8 22.56 24.80 25.96 6.3 9.2 18.76 20.72 22.04 6.1 8.6 16.52 18.24 19.20 5.7 7.7 15.30 16.90 17.76 4.3 6.2 13.38 14.86 15.74 4.3 6.2 12.10 13.56 14.20 4.2 6.0 11.38 12.60 13.28 4.1 5.9 10.62 11.82 12.48 4.0 5.7 8.90 9.88 10.44 3.7 5.2 8.36 9.32 9.94 3.5 4.9 8.00 8.88 9.36 3.0 4.5 7.08 7.88 8.34 2.9 4.0 6.32 7.08 7.54 2.6 3.6 5.96 6.56 6.98 2.3 3.1 5.38 5.94 6.28 2.1 3.0 4.76 5.40 5.66 2.0 2.9 4.40 4.98 5.30 1.9 2.7 3.92 4.46 4.74 1.8 2.6 3.66 4.08 4.38 1.6 2.3 3.12 3.56 3.78 1.5 2.2 3.02 3.36 3.58 1.4 1.9 2.60 2.94 3.10 1.3 1.8 2.36 2.68 2.84 1.2 1.7 2.24 2.50 2.62 1.0 1.6 1.94 2.18 2.34 0.90 1.2 1.72 1.92 2.06 0.80 1.0 1.62 1.82 1.92 0.75 1.0 1.44 1.64 1.74 0.66 0.90 1.40 1.54 1.66 0.60 0.80 1.24 1.32 1.46 0.55 0.75 1.14 1.28 1.42 0.50 0.70 0.982 1.08 1.18 0.48 0.68 1. Please specify termination and packaging codes: MSS1278T-105KLD Termination: L = RoHS compliant matte tin over nickel over phos bronze. Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). Packaging: D= 13″ machine-ready reel. EIA-481 embossed plastic tape (500 parts per full reel). B= Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. 2. Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc using an Agilent/HP 4263B LCR meter or equivalent. 3. DCR measured on a micro-ohmmeter and a Coilcraft CCF858 test fixture. 4. SRF measured using an Agilent/HP 8753D network analyzer and a Coilcraft SMD-D test fixture. 5. DC current at which the inductance drops the specified amount from its value without current. 6. Current that causes the specified temperature rise from 25°C ambient. 7. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 Document 598-1 Revised 10/20/08 Document 598-2 URE T A R E P M E T HIGH SMT Power Inductors – MSS1278T Series Typical L vs Frequency Typical L vs Current 10000 10000 1000 µH 100 µH 100 1000 µH 1000 Inductance (µH) Inductance (µH) 1000 10 µH 10 1 µH 1 100 µH 100 10 µH 10 1 µH 1 0.1 0.1 0.01 1 0.1 10 0.1 10 1 100 Current (A) Frequency (MHz) Current Derating 0.472 ±0.012 12,0 ±0,3 120 0.472 ±0.012 12,0 ±0,3 100 90 123 X Dash number Internal code 80 70 60 50 0.307 ±0.01 7,80 ±0,25 40 25°C Percent of rated Current 110 30 20 Recommended Land Pattern Isat Irms 10 0 -40 -20 0 0.217 5,5 0.197 ±0.008 5,0 ±0,2 20 40 60 80 100 120 Ambient temperature (°C) 140 160 180 0.157 4,0 0.138 ±0.016 3,5 ±0,4 0.197 ±0.016 5,0 ±0,4 Dimensions are in inches mm Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 0.334 8,5 Document 598-2 Revised 10/20/08