Web Sample Tools & Support Document 322-1 page & buy software & FAQ SMT Power Inductors MSS1278 12.3 12.3 mm footprint 8 mm high shielded inductors Low DCR and excellent current handling Designers 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 40C to +85C with (40C rise) Irms current. Maximum part temperature +125C (ambient + temp rise). Derating. Storage temperature Component: 40C to +125C. Tape and reel 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, 0.5 mm thick, 16 mm pocket spacing, 8.7 mm pocket depth PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787 PCB Washing.pdf. 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 1 MSS1278-105KLD Part number (H) typ max (MHz) drop drop drop rise rise Termination: L = RoHS compliant matte tin over MSS1278-142ML 1.4 20% 8.8 9.8 80.0 25.2 28.6 30.6 7.00 10.00 nickel over phos bronze. MSS1278-472ML 4.7 20% 13.9 15.5 30.0 13.7 15.2 15.9 4.30 6.20 Special order: T = RoHS tin-silver-copper MSS1278-562ML 5.6 20% 15.7 17.5 24.0 12.2 13.7 14.6 4.30 6.20 (95.5/4/0.5) or S = non-RoHS MSS1278-682ML 6.8 20% 19.1 21.3 21.0 11.3 12.7 13.7 4.20 6.00 tin-lead (63/37). MSS1278-822ML 8.2 20% 20.3 22.6 20.0 10.1 11.5 12.3 4.10 5.90 Packaging: D = 13 machine-ready reel. EIA- MSS1278-103ML 10 20% 21.8 24.3 17.0 9.36 10.6 11.2 4.00 5.70 481 embossed plastic tape MSS1278-123ML 12 20% 23.2 25.8 15.0 8.84 10.0 10.7 3.70 5.20 (500 parts per full reel). B = Less than full reel. In tape, but MSS1278-153ML 15 20% 27.9 31.0 13.0 7.30 8.36 9.00 3.50 4.90 not machine ready. To have a MSS1278-183ML 18 20% 30.8 34.3 12.0 6.10 7.10 7.74 3.00 4.50 leader and trailer added ( 25 MSS1278-223ML 22 20% 35.5 39.5 11.0 6.04 6.78 7.24 2.90 4.00 charge), use code letter D MSS1278-273ML 27 20% 45.0 50.0 10.0 5.80 6.56 7.02 2.60 3.60 instead. 2. Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc us- MSS1278-333ML 33 20% 61.9 68.8 9.5 5.22 5.90 6.30 2.30 3.10 ing an Agilent/HP 4263B LCR meter or equivalent. MSS1278-393ML 39 20% 69.1 76.8 8.5 4.68 5.42 5.80 2.10 3.00 3. DCR measured on a micro-ohmmeter and a MSS1278-473ML 47 20% 72.3 80.4 7.5 4.40 5.02 5.32 2.00 2.90 Coilcraft CCF858 test fixture. MSS1278-563ML 56 20% 80.2 89.2 7.0 4.02 4.60 4.90 1.90 2.70 4. SRF measured using an Agilent/HP 4191A or MSS1278-683ML 68 20% 91.3 101.5 6.5 3.40 3.86 4.26 1.80 2.60 equivalent. MSS1278-823ML 82 20% 125.9 139.9 5.0 3.12 3.58 3.80 1.60 2.30 5. DC current at 25C that causes the specified inductance drop from its value without current. MSS1278-104ML 100 20% 135.1 150.2 4.5 2.88 3.28 3.52 1.50 2.20 Click for temperature derating information. MSS1278-124KL 120 10% 182.3 202.6 4.3 2.62 3.00 3.24 1.40 1.90 6. Current that causes the specified temperature MSS1278-154KL 150 10% 216.5 240.6 4.1 2.48 2.86 3.02 1.30 1.80 rise from 25C ambient. This information is for MSS1278-184KL 180 10% 229.0 254.5 4.0 2.26 2.58 2.74 1.20 1.70 reference only and does not represent absolute maximum ratings. MSS1278-224KL 220 10% 323.6 359.6 3.4 1.96 2.22 2.36 1.00 1.60 Click for temperature derating information. MSS1278-274KL 270 10% 415.6 461.8 3.1 1.74 2.04 2.18 0.90 1.20 7. Electrical specifications at 25C. MSS1278-334KL 330 10% 487.3 541.5 2.9 1.66 1.86 2.00 0.80 1.00 Refer to Doc 362 Soldering Surface Mount MSS1278-394KL 390 10% 533.6 592.9 2.7 1.52 1.72 1.88 0.75 1.00 Components before soldering. MSS1278-474KL 470 10% 707.5 786.2 2.2 1.34 1.54 1.64 0.66 0.90 MSS1278-564KL 560 10% 777.4 863.8 2.0 1.24 1.42 1.50 0.60 0.80 MSS1278-684KL 680 10% 1045 1162 1.7 1.16 1.28 1.38 0.55 0.75 MSS1278-824KL 820 10% 1166 1296 1.4 1.04 1.16 1.26 0.50 0.70 MSS1278-105KL 1000 10% 1334 1483 1.3 0.97 1.10 1.14 0.48 0.68 US +1-847-639-6400 sales coilcraft.com Document 322-1 Revised 09/02/15 UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2017 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg 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 H 1000 H 1000 1000 100 H 100 H 100 100 10 H 10 H 10 10 4.7 H 4.7 H 1 1 0.1 1 10 100 0.01 0.1 1 10 Current (A) Frequency (MHz) 0.472 0.012 12,0 0,3 Dash number 123 0.472 0.012 12,0 0,3 Internal code X 0.307 0.010 7,8 0,25 Recommended 0.197 0.008 Land Pattern 0.025 5,0 0,2 0,635 0.217 5,5 0.157 0.138 0.008 3,5 0,2 4,0 0.197 0.008 0.334 5,0 0,2 8,5 inches Dimensions are in mm US +1-847-639-6400 sales coilcraft.com Document 322-2 Revised 09/02/15 UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2017 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information. Inductance (H) Inductance (H)