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 Isat (A)5 Irms (A)6 DCR3 SRF 2 (mOhms) 4 Inductance typ 10% 20% 30% 20°C40°C Part number1 (µH) typ max (MHz)drop drop drop rise rise MSS1278T-102NL_ 1.0 ±30% 6.3 7.0 115 31.84 35.04 36.84 7.1 10.1 MSS1278T-142NL_ 1.4 ±30% 8.8 9.8 85 25.04 27.76 29.52 6.8 9.8 MSS1278T-222NL_ 2.2 ±30% 9.4 10.5 60 22.56 24.80 25.96 6.3 9.2 MSS1278T-272NL_ 2.7 ±30% 10.1 11.3 40 18.76 20.72 22.04 6.1 8.6 MSS1278T-392NL_ 3.9 ±30% 11.7 13.0 35 16.52 18.24 19.20 5.7 7.7 MSS1278T-472ML_ 4.7 ±20% 13.9 15.5 33 15.30 16.90 17.76 4.3 6.2 MSS1278T-562ML_ 5.6 ±20% 15.7 17.5 30 13.38 14.86 15.74 4.3 6.2 MSS1278T-682ML_ 6.8 ±20% 19.1 21.3 23 12.10 13.56 14.20 4.2 6.0 MSS1278T-822ML_ 8.2 ±20% 20.3 22.6 20 11.38 12.60 13.28 4.1 5.9 MSS1278T-103ML_ 10 ±20% 21.8 24.3 17 10.62 11.82 12.48 4.0 5.7 MSS1278T-123ML_ 12 ±20% 23.2 25.8 15 8.90 9.88 10.44 3.7 5.2 MSS1278T-153ML_ 15 ±20% 27.9 31.0 13 8.36 9.32 9.94 3.5 4.9 MSS1278T-183ML_ 18 ±20% 30.8 34.3 12 8.00 8.88 9.36 3.0 4.5 MSS1278T-223ML_ 22 ±20% 35.5 39.5 11 7.08 7.88 8.34 2.9 4.0 MSS1278T-273ML_ 27 ±20% 45.0 50.0 10 6.32 7.08 7.54 2.6 3.6 MSS1278T-333ML_ 33 ±20% 61.9 68.8 9.5 5.96 6.56 6.98 2.3 3.1 MSS1278T-393ML_ 39 ±20% 69.1 76.8 8.5 5.38 5.94 6.28 2.1 3.0 MSS1278T-473ML_ 47 ±20% 72.3 80.4 7.5 4.76 5.40 5.66 2.0 2.9 MSS1278T-563ML_ 56 ±20% 80.2 89.2 7.0 4.40 4.98 5.30 1.9 2.7 MSS1278T-683ML_ 68 ±20% 91.3 101.5 6.5 3.92 4.46 4.74 1.8 2.6 MSS1278T-823ML_ 82 ±20% 125.9 139.9 5.0 3.66 4.08 4.38 1.6 2.3 MSS1278T-104ML_ 100 ±20%135.1 150.2 4.53.123.563.781.52.2 MSS1278T-124KL_ 120 ±10%182.3 202.6 4.33.023.363.581.41.9 MSS1278T-154KL_ 150 ±10%216.5 240.6 4.12.602.943.101.31.8 MSS1278T-184KL_ 180 ±10%229.0 254.5 4.02.362.682.841.21.7 MSS1278T-224KL_ 220 ±10%323.6 359.6 3.42.242.502.621.01.6 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 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. Document 598-1 Revised 08/18/11 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 10 µH 10 1 µH 1 0.1 1000 µH 1000 Inductance (µH) Inductance (µH) 1000 0.01 100 µH 100 10 µH 10 1 µH 1 1 0.1 10 0.1 0.1 10 1 100 Current (A) Frequency (MHz) Current Derating 120 100 90 80 70 60 50 40 25°C Percent of rated Current 110 30 20 Isat Irms 10 0 -40 -20 0 20 40 60 80 100 120 140 160 180 Ambient temperature (°C) Dimensions are in inches mm Document 598-2 Revised 08/18/11