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Coilcraft CPS
Close up of MSS1278
3D Model Datasheet Spice Model SPICE DCDC Tool

MSS1278 Series

Shielded Surface Mount Power Inductors

RoHS compliant AEC-Q flag
Coilcraft MSS1278 Series shielded surface-mount power inductors feature low DC resistance and excellent current handling in a wide range of inductance values, making them a cost-effective option for a variety of general-purpose applications. 
  • Low-loss ferrite drum core for flat inductance vs current
  • Low DC resistance for greater efficiency
  • Excellent current handling
  • Magnetic shielding allows high-density mounting
  • AEC-Q200 Grade 3 (-40°C to +85°C)

Buy Now:
Find my part
Count Unit price
1 $2.29
250 $1.54
500 $0.93
1000 $0.73
2500 $0.62
5000 $0.58

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
Request a Sample:
Find my part
Designer's Kit:
Kit Values Price
C380 30 (3 of each) $90.00

Specifications

Electrical specifications at 25°C.

Part number 1 Inductance (µH) 2 Tolerance (%) DCR (mΩ) 3 SRF typ (MHz) 4 Isat (A) 5 Irms (A) 6
typ max 10% drop 20% drop 30% drop 20°C rise 40°C rise
MSS1278-142ML_ 1.4 20 8.8 9.8 80.0 25.2 28.6 30.6 4.3 10.0
MSS1278-472ML_ 4.7 20 13.9 15.5 30.0 13.7 15.2 15.9 4.3 6.2
MSS1278-562ML_ 5.6 20 15.7 17.5 24.0 12.2 13.7 14.6 4.3 6.2
MSS1278-682ML_ 6.8 20 19.1 21.3 21.0 11.3 12.7 13.7 4.2 6.0
MSS1278-822ML_ 8.2 20 20.3 22.6 20.0 10.1 11.5 12.3 4.1 5.9
MSS1278-103ML_ 10 20 21.8 24.3 17.0 9.4 10.6 11.2 4.0 5.7
MSS1278-123ML_ 12 20 23.2 25.8 15.0 8.8 10.0 10.7 3.7 5.2
MSS1278-153ML_ 15 20 27.9 31.0 13.0 7.3 8.4 9.0 3.5 4.9
MSS1278-183ML_ 18 20 30.8 34.3 12.0 6.1 7.1 7.7 3.0 4.5
MSS1278-223ML_ 22 20 35.5 39.5 11.0 6.0 6.8 7.2 2.9 4.0
MSS1278-273ML_ 27 20 45.0 50.0 10.0 5.8 6.6 7.0 2.6 3.6
MSS1278-333ML_ 33 20 61.9 68.8 9.5 5.2 5.9 6.3 2.3 3.1
MSS1278-393ML_ 39 20 69.1 76.8 8.5 4.7 5.4 5.8 2.1 3.0
MSS1278-473ML_ 47 20 72.3 80.4 7.5 4.4 5.0 5.3 2.0 2.9
MSS1278-563ML_ 56 20 80.2 89.2 7.0 4.0 4.6 4.9 1.9 2.7
MSS1278-683ML_ 68 20 91.3 102 6.5 3.4 3.9 4.3 1.8 2.6
MSS1278-823ML_ 82 20 126 140 5.0 3.1 3.6 3.8 1.6 2.3
MSS1278-104ML_ 100 20 135 150 4.5 2.9 3.3 3.5 1.5 2.2
MSS1278-124KL_ 120 10 182 203 4.3 2.6 3.0 3.2 1.4 1.9
MSS1278-154KL_ 150 10 217 241 4.1 2.5 2.9 3.0 1.3 1.8
MSS1278-184KL_ 180 10 229 255 4.0 2.3 2.6 2.7 1.2 1.7
MSS1278-224KL_ 220 10 324 360 3.4 2.0 2.2 2.4 1.0 1.6
MSS1278-274KL_ 270 10 416 462 3.1 1.7 2.0 2.2 0.90 1.2
MSS1278-334KL_ 330 10 487 542 2.9 1.7 1.9 2.0 0.80 1.0
MSS1278-394KL_ 390 10 534 593 2.7 1.5 1.7 1.9 0.75 1.0
MSS1278-474KL_ 470 10 708 786 2.2 1.3 1.5 1.6 0.66 0.90
MSS1278-564KL_ 560 10 777 864 2.0 1.2 1.4 1.5 0.60 0.80
MSS1278-684KL_ 680 10 1045 1162 1.7 1.2 1.3 1.4 0.55 0.75
MSS1278-824KL_ 820 10 1166 1296 1.4 1.0 1.2 1.3 0.50 0.70
MSS1278-105KL_ 1000 10 1334 1483 1.3 0.97 1.1 1.1 0.48 0.68
Notes
  1. When ordering, please specify termination and packaging codes: e.g. MSS1278-105KLD
  2. Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc using an Agilent/HP 4263B LCR meter or equivalent
  3. DCR measured at 25°C on a micro-ohmmeter and a Coilcraft CCF858 test fixture. For other operating temperatures, use this DCR at Temperature calculator
  4. SRF measured using an Agilent/HP 4191A or equivalent.
  5. Isat: DC current at 25°C that causes the specified inductance drop from its value without current. Temperature derating curves.
  6. Irms: Current that causes the specified temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Temperature derating curves.

Termination:

  • L = RoHS compliant matte tin over nickel over phos bronze.
  • T = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
  • S = non-RoHS tin-lead (63/37). (Special order, added cost)

Packaging:

  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape (500 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
  • B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +85°C with (40°C rise) Irms current.
Storage temperature range:
Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Maximum part temperature:
+125°C (ambient + temp rise). Derating.
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
See FIT/MTBF Calculations

Performance curves

Inductance vs. Current

Inductance vs. Current

Inductance vs. Frequency

Inductance vs. Frequency

Physical characteristics

mss1278d.gif
dims_inches_mm.gif

Tape and Reel specification

tapereel_pl.gif

 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation ‡
13" (330 mm) A B C D E W P Po P1 H T part_or_o.gif
500 330 100 13 30,4 24,4 24 16 4 2 8,7 0,5
‡ Part marking does not indicate polarity.

General specification

Core Material:
Ferrite
Weight:
3.8 - 4.6 g
Packaging:
500/13″ reel; Plastic tape: 24 mm wide, 0.5 mm thick, 16 mm pocket spacing, 8.7 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

Related product series

MOS6020 Series

MSS1038 Series

MSS1038T Series

MSS1048 Series

MSS1048T Series

MSS1210 Series

MSS1210H Series

MSS1246 Series

MSS1246H Series

MSS1246T Series

MSS1260 Series

MSS1260H Series

MSS1260T Series

MSS1278H Series

MSS1278T Series

MSS1514V Series

MSS1812T Series

MSS1583 Series

MSS5050T Series

MSS5121 Series

MSS5131 Series

MSS5131H Series

MSS6122 Series

MSS6132 Series

MSS6132T Series

MSS7331 Series

MSS7341 Series

MSS7341T Series

MSS7348 Series

Related product families

LPS

  • High performance in a low profile
  • High energy storage and low DC resistance

LPZ

  • Higher inductance values than LPS series
  • Rugged construction  -Some AEC-Q200