Web Sample Tools & Support
Document 598-1
page & buy software & FAQ
High Temp Power Inductors MSS1278T
Designed for high ambient temperatures
Magnetic shielding, very low DCR, excellent current handling
Designers Kit C419 contains 3 of each value
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 g 4.6 g
Ambient temperature 40C to +125C with (40C rise) Irms current.
Maximum part temperature +165C (ambient + temp rise). Derating.
Storage temperature Component: 40C to +165C.
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
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 network
MSS1278T-473ML_ 47 20% 72.3 80.4 7.5 4.76 5.40 5.66 2.0 2.9
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 25C that causes the specified
MSS1278T-683ML_ 68 20% 91.3 101.5 6.5 3.92 4.46 4.74 1.8 2.6
inductance drop 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
Click for temperature derating information.
MSS1278T-104ML_ 100 20% 135.1 150.2 4.5 3.12 3.56 3.78 1.5 2.2
6. Current that causes the specified temperature
MSS1278T-124KL_ 120 10% 182.3 202.6 4.3 3.02 3.36 3.58 1.4 1.9
rise from 25C ambient. This information is for
MSS1278T-154KL_ 150 10% 216.5 240.6 4.1 2.60 2.94 3.10 1.3 1.8
reference only and does not represent absolute
MSS1278T-184KL_ 180 10% 229.0 254.5 4.0 2.36 2.68 2.84 1.2 1.7
maximum ratings.
Click for temperature derating information.
MSS1278T-224KL_ 220 10% 323.6 359.6 3.4 2.24 2.50 2.62 1.0 1.6
7. Electrical specifications at 25C.
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 Refer to Doc 362 Soldering Surface Mount
Components before soldering.
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
US +1-847-639-6400 sales@coilcraft.com Document 598-1 Revised 09/03/15
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 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)
inches
Dimensions are in
mm
US +1-847-639-6400 sales@coilcraft.com Document 598-2 Revised 09/03/15
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.
HIGH TEMPERATURE
Inductance (H)
Inductance (H)