Document 322-1 SMT Power Inductors – MSS1278 • 12.3 × 12.3 mm footprint; 8 mm high shielded inductors • Low DCR and excellent current handling Designer’s Kit C380 contains 3 each of all values. Core material Ferrite Core and winding loss See www.coilcraft.com/coreloss Terminations RoHS compliant matte tin over nickel over phos bronze. Other terminations available at additional cost. Weight: 3.8 – 4.6 g Ambient temperature –40°C to +85°C with Irms current, +85°C to +125°C with derated current Storage temperature Component: –40°C to +125°C. Tape and reel 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, 0.5 mm thick, 16 mm pocket spacing, 8.7 mm pocket depth PCB washing Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf. Part number1 DCR Inductance2 (mOhms) (µH) typ max 3 Isat (A)5 Irms (A)6 SRF typ4 10% 20% 30% 20°C 40°C (MHz) drop drop drop rise rise MSS1278-142ML_ 1.4 ±20% MSS1278-472ML_ 4.7 ±20% MSS1278-562ML_ 5.6 ±20% MSS1278-682ML_ 6.8 ±20% MSS1278-822ML_ 8.2 ±20% 8.8 13.9 15.7 19.1 20.3 9.8 15.5 17.5 21.3 22.6 80.0 30.0 24.0 21.0 20.0 MSS1278-103ML_ 10 ±20% MSS1278-123ML_ 12 ±20% MSS1278-153ML_ 15 ±20% MSS1278-183ML_ 18 ±20% MSS1278-223ML_ 22 ±20% 21.8 23.2 27.9 30.8 35.5 24.3 25.8 31.0 34.3 39.5 17.0 15.0 13.0 12.0 11.0 MSS1278-273ML_ 27 ±20% MSS1278-333ML_ 33 ±20% MSS1278-393ML_ 39 ±20% MSS1278-473ML_ 47 ±20% MSS1278-563ML_ 56 ±20% 45.0 61.9 69.1 72.3 80.2 50.0 68.8 76.8 80.4 89.2 MSS1278-683ML_ 68 ±20% MSS1278-823ML_ 82 ±20% MSS1278-104ML_ 100 ±20% MSS1278-124KL_ 120 ±10% MSS1278-154KL_ 150 ±10% 91.3 125.9 135.1 182.3 216.5 MSS1278-184KL_ 180 ±10% MSS1278-224KL_ 220 ±10% MSS1278-274KL_ 270 ±10% MSS1278-334KL_ 330 ±10% MSS1278-394KL_ 390 ±10% 229.0 323.6 415.6 487.3 533.6 MSS1278-474KL_ 470 ±10% MSS1278-564KL_ 560 ±10% MSS1278-684KL_ 680 ±10% MSS1278-824KL_ 820 ±10% MSS1278-105KL_ 1000 ±10% 25.2 13.7 12.2 11.3 10.1 28.6 15.2 13.7 12.7 11.5 30.6 15.9 14.6 13.7 12.3 7.00 4.30 4.30 4.20 4.10 10.00 6.20 6.20 6.00 5.90 9.36 10.6 11.2 8.84 10.0 10.7 7.30 8.36 9.00 6.10 7.10 7.74 6.04 6.78 7.24 4.00 3.70 3.50 3.00 2.90 5.70 5.20 4.90 4.50 4.00 10.0 9.5 8.5 7.5 7.0 5.80 5.22 4.68 4.40 4.02 6.56 5.90 5.42 5.02 4.60 7.02 6.30 5.80 5.32 4.90 2.60 2.30 2.10 2.00 1.90 3.60 3.10 3.00 2.90 2.70 101.5 139.9 150.2 202.6 240.6 6.5 5.0 4.5 4.3 4.1 3.40 3.12 2.88 2.62 2.48 3.86 3.58 3.28 3.00 2.86 4.26 3.80 3.52 3.24 3.02 1.80 1.60 1.50 1.40 1.30 2.60 2.30 2.20 1.90 1.80 254.5 359.6 461.8 541.5 592.9 4.0 3.4 3.1 2.9 2.7 2.26 1.96 1.74 1.66 1.52 2.58 2.22 2.04 1.86 1.72 2.74 2.36 2.18 2.00 1.88 1.20 1.00 0.90 0.80 0.75 1.70 1.60 1.20 1.00 1.00 707.5 786.2 777.4 863.8 1045 1162 1166 1296 1334 1483 2.2 2.0 1.7 1.4 1.3 1.34 1.24 1.16 1.04 0.97 1.54 1.42 1.28 1.16 1.10 1.64 1.50 1.38 1.26 1.14 0.66 0.60 0.55 0.50 0.48 0.90 0.80 0.75 0.70 0.68 1. Please specify termination and packaging codes: MSS1278-105KLD 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. EIA481 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 4191A or equivalent. 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. US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 322-1 Revised 04/04/13 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 322-2 SMT Power Inductors – MSS1278 Typical L vs Current Typical L vs Frequency 10000 10000 1000 µH 100 µH 100 10 µH 10 1 1000 µH 1000 Inductance (µH) Inductance (µH) 1000 10 µH 10 4.7 µH 0.1 100 µH 100 10 1 100 Current (A) 4.7 µH 1 0.01 10 Frequency (MHz) 0.472 ±0.012 12,0 ±0,3 Typical Current Derating 120 110 123 X 0.472 ±0.012 12,0 ±0,3 100 Dash number Internal code Parts manufactured prior to Sept. 2007 were marked with only the dash number. 90 80 70 60 0.307 ±0.010 7,8 ±0,25 50 40 30 20 10 0 Isat Irms -40 -20 0 0.197 ±0.008 5,0 ±0,2 25°C Percent of rated current 1 0.1 20 40 60 80 100 120 140 0.025 0,635 Recommended Land Pattern 0.217 5,5 0.157 4,0 0.138 ±0.008 3,5 ±0,2 0.197 ±0.008 5,0 ±0,2 Ambient temperature (°C) Dimensions are in 0.334 8,5 inches mm US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 322-2 Revised 04/04/13 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.