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MSD1278 Series
Shielded Coupled Inductors

  • Ideal for use as coupled inductors in SEPIC applications DETAILS
  • Can be used as two inductors connected in series or parallel, or as a transformer
  • Saturation current rating up to 14.9 Amps! Low DC resistance provides high efficiency
  • 500 V isolation, winding-to-winding and winding-to-core
  • RoHS-compliant. 260°C compatible. Matte tin over nickel over phos bronze terminations
  • For a lower profile part, consider our MSD1260 coupled inductors
  • COTS Plus tin-silver-copper and tin-lead terminations available
  • Samples of all values are available in Coilcraft Designer's Kit C400

Photo    Pricing    Materials declaration    PDF data sheet

SPECIFICATIONS

L vs Frequency    L vs Current      Current  Derating    Dimensions

Tape and reel specifications    Qualification standards    
MSD1278-472ML_ 4.7 ±20% 0.019 32 14.9 7.4 18.8 ±25% 0.076 12.0 7.7 3.6
MSD1278-562ML_ 5.6 ±20% 0.023 25 13.4 7.2 22.4 ±25% 0.092 10.4 6.6 3.5
MSD1278-682ML_ 6.8 ±20% 0.024 24 13.1 6.9 27.2 ±25% 0.096 9.5 6.4 3.4
MSD1278-822ML_ 8.2 ±20% 0.025 18 10.8 6.6 32.8 ±25% 0.100 7.2 5.6 3.3
MSD1278-103ML_ 10 ±20% 0.029 16.5 10.5 6.2 40 ±25% 0.116 6.6 5.4 3.2
MSD1278-123ML_ 12 ±20% 0.031 14.5 9.6 6.0 48 ±25% 0.124 5.4 4.8 2.9
MSD1278-153ML_ 15 ±20% 0.036 11.8 9.1 5.8 60 ±25% 0.144 5.0 4.3 2.7
MSD1278-183ML_ 18 ±20% 0.040 10.5 8.0 5.5 72 ±25% 0.158 3.8 3.9 2.5
MSD1278-223ML_ 22 ±20% 0.048 9.0 6.8 5.2 88 ±25% 0.190 3.4 3.5 2.2
MSD1278-273ML_ 27 ±20% 0.060 8.4 6.5 4.7 108 ±25% 0.240 3.2 3.4 2.0
MSD1278-333ML_ 33 ±20% 0.075 7.6 5.6 4.2 132 ±25% 0.30 3.0 3.1 1.7
MSD1278-393ML_ 39 ±20% 0.080 6.5 5.5 3.6 156 ±25% 0.32 2.6 2.8 1.6
MSD1278-473ML_ 47 ±20% 0.090 6.0 5.2 3.0 188 ±25% 0.36 2.1 2.6 1.5
MSD1278-563ML_ 56 ±20% 0.095 5.6 4.5 2.8 224 ±25% 0.38 2.0 2.4 1.4
MSD1278-683ML_ 68 ±20% 0.105 5.0 4.1 2.6 272 ±25% 0.42 1.6 2.1 1.3
MSD1278-823ML_ 82 ±20% 0.140 4.1 3.8 2.3 328 ±25% 0.56 1.3 1.9 1.2
MSD1278-104ML_ 100 ±20% 0.150 3.6 3.4 2.0 400 ±25% 0.60 1.1 1.7 1.1
MSD1278-124KL_ 120 ±10% 0.205 3.2 3.2 1.9 480 ±25% 0.82 1.0 1.6 1.0
MSD1278-154KL_ 150 ±10% 0.230 3.0 2.8 1.8 600 ±25% 0.92 0.82 1.4 0.89
MSD1278-184KL_ 180 ±10% 0.255 2.7 2.5 1.7 720 ±25% 1.02 0.70 1.3 0.84
MSD1278-224KL_ 220 ±10% 0.345 2.5 2.3 1.6 880 ±25% 1.38 0.64 1.1 0.75
MSD1278-274KL_ 270 ±10% 0.450 2.1 2.1 1.5 1080 ±25% 1.80 0.55 1.0 0.71
MSD1278-334KL_ 330 ±10% 0.510 2.0 1.9 1.3 1320 ±25% 2.04 0.47 0.92 0.62
MSD1278-394KL_ 390 ±10% 0.560 1.8 1.7 1.1 1560 ±25% 2.24 0.41 0.84 0.53
MSD1278-474KL_ 470 ±10% 0.765 1.6 1.6 0.87 1880 ±25% 3.06 0.36 0.80 0.43
MSD1278-564KL_ 560 ±10% 0.845 1.5 1.5 0.83 2240 ±25% 3.38 0.31 0.73 0.40
MSD1278-684KL_ 680 ±10% 1.145 1.4 1.3 0.76 2720 ±25% 4.58 0.30 0.63 0.36
MSD1278-824KL_ 820 ±10% 1.275 1.3 1.2 0.69 3280 ±25% 5.10 0.24 0.58 0.33
MSD1278-105KL_ 1000 ±10% 1.415 1.1 1.1 0.60 4000 ±25% 5.66 0.20 0.56 0.30
1 When ordering, please specify termination and packaging codes: e.g. MSD1278-105KLD
  Termination: L = RoHS compliant matte tin over nickel over phos bronze
Special order, added cost: T = RoHS tin-silver-copper (95.5/4/0.5) or
S = non-RoHS tin-lead (63/37).
Packaging: D = 13" reel, machine-ready 
EIA-481 embossed plastic tape (500 parts per full reel).
B = Less than full reel
In tape, not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead.
2 Inductance shown for coupled inductor and for two inductors connected in parallel.
3 Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc, on an Agilent/HP 4263B LCR meter or equivalent.
4 DCR is for both windings connected in parallel. DCR for each winding is twice the value.
5 SRF measured using an Agilent/HP 4191A network analyzer or equivalent. Details
6 Isat: DC current at which the inductance drops 30% (typ) from its value without current. Details
7 Irms: Current that causes a 40°C rise from 25°C ambient. Details
8 DCR is for both windings.
9 Ambient temperature range: –40°C to +85°C with Irms current.
+85°C to +125°C with derated current Derating curve
10 Storage temperature range: Component: –40°C to +125°C
Packaging: –55°C to +80°C
11 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
12 Electrical specifications at 25°C.
See Qualification Standards for complete environmental and test data.
Refer to Soldering Coilcraft Components before soldering.
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Updated: May 21, 2008