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MSD1278T High Temperature
Shielded Coupled Power Inductors

  • Coupled, shielded power inductors for use in high temperature Flyback, SEPIC, Cuk, Zeta and other applications
  • See Selecting inductors for SEPIC and SEPIC Inductor Selector tool
  • AEC-Q200 Grade 1 (–40°C to +125°C)
  • Excellent coupling coefficient: K > 0.98
  • Also suitable for use as common mode chokes
  • Saturation current rating over 16 Amps! Low DC resistance provides high efficiency.
  • 500 Vrms, one minute winding-to-winding isolation
  • RoHS-compliant. 260°C compatible. Matte tin over nickel over phos bronze terminations
  • COTS Plus tin-silver-copper and tin-lead terminations available

SPECIFICATIONS


Part number1
Click for samples
Inductance2
(µH)
DCR
max3
(Ohms)
SRF
typ4
(MHz)
Coupling
coefficient
typ
Leakage
L typ5
(µH)
Isat(A)6 Irms (A)
10%
drop
20%
drop
30%
drop
both
windings7
single
winding8
MSD1278T-472ML_ 4.7 ±20% 0.040 33.0 0.98 0.22 13.90 15.20 16.36 3.16 4.47
MSD1278T-562ML_ 5.6 ±20% 0.046 30.0 0.98 0.23 13.38 14.86 15.74 2.87 4.06
MSD1278T-682ML_ 6.8 ±20% 0.048 23.0 0.98 0.22 12.10 13.56 14.20 2.81 3.98
MSD1278T-822ML_ 8.2 ±20% 0.055 20.0 0.98 0.34 10.30 11.52 12.20 2.76 3.90
MSD1278T-103ML_ 10 ±20% 0.058 17.0 0.98 0.34 8.80 10.00 10.66 2.56 3.62
MSD1278T-123ML_ 12 ±20% 0.062 15.0 0.98 0.36 8.20 9.18 9.74 2.48 3.50
MSD1278T-153ML_ 15 ±20% 0.072 13.0 0.99 0.41 7.40 8.36 9.03 2.30 3.25
MSD1278T-183ML_ 18 ±20% 0.080 12.0 0.99 0.37 6.50 7.38 7.86 2.18 3.08
MSD1278T-223ML_ 22 ±20% 0.096 11.0 0.99 0.41 6.00 6.80 7.26 1.99 2.81
MSD1278T-273ML_ 27 ±20% 0.120 10.0 0.99 0.43 5.80 6.56 7.02 1.78 2.52
MSD1278T-333ML_ 33 ±20% 0.150 9.5 0.99 0.56 5.50 6.10 6.52 1.59 2.25
MSD1278T-393ML_ 39 ±20% 0.161 8.5 0.99 0.64 4.70 5.26 5.60 1.54 2.18
MSD1278T-473ML_ 47 ±20% 0.180 7.5 0.99 0.70 3.70 4.34 4.60 1.45 2.05
MSD1278T-563ML_ 56 ±20% 0.190 7.0 0.99 0.76 3.60 4.18 4.50 1.41 2.00
MSD1278T-683ML_ 68 ±20% 0.210 6.5 0.99 0.88 3.50 4.04 4.32 1.35 1.90
MSD1278T-823ML_ 82 ±20% 0.280 5.0 0.99 0.85 3.30 3.72 4.02 1.16 1.65
MSD1278T-104ML_ 100 ±20% 0.300 4.5 >0.99 0.90 2.80 3.24 3.46 1.13 1.59
MSD1278T-124KL_ 120 ±10% 0.410 4.3 0.99 1.31 2.60 2.94 3.16 0.96 1.36
MSD1278T-154KL_ 150 ±10% 0.460 4.1 >0.99 1.46 2.20 2.54 2.70 0.91 1.29
MSD1278T-184KL_ 180 ±10% 0.510 4.0 >0.99 0.98 2.10 2.42 2.58 0.86 1.22
MSD1278T-224KL_ 220 ±10% 0.690 3.4 >0.99 1.54 1.90 2.16 2.28 0.74 1.05
MSD1278T-274KL_ 270 ±10% 0.900 3.1 >0.99 1.17 1.70 1.94 2.10 0.65 0.92
MSD1278T-334KL_ 330 ±10% 1.02 2.9 0.99 4.14 1.50 1.70 1.84 0.61 0.86
MSD1278T-394KL_ 390 ±10% 1.12 2.7 >0.99 1.64 1.40 1.60 1.70 0.58 0.82
MSD1278T-474KL_ 470 ±10% 1.53 2.2 >0.99 0.25 1.30 1.50 1.60 0.50 0.70
MSD1278T-564KL_ 560 ±10% 1.69 2.0 >0.99 2.68 1.20 1.34 1.46 0.47 0.67
MSD1278T-684KL_ 680 ±10% 2.29 1.7 >0.99 2.11 1.00 1.08 1.22 0.41 0.58
MSD1278T-824KL_ 820 ±10% 2.55 1.4 >0.99 2.39 0.900 1.04 1.18 0.39 0.55
MSD1278T-105KL_ 1000 ±10% 2.87 1.3 >0.99 4.28 0.850 0.948 1.05 0.37 0.52
1 When ordering, please specify termination and packaging codes: e.g. MSD1278T-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 each winding, measured at 100 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads are connected in parallel, inductance is the same value. When leads are connected in series, inductance is four times the value.
3 DCR is for each winding. When leads are connected in parallel, DCR is half the value. When leads are connected in series, DCR is twice the value. DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator
4 SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value. Details
5 Leakage inductance is for L1 and is measured with L2 shorted.
6 Isat: DC current, at which the inductance drops the specified amount from its value without current. It is the sum of the current flowing in both windings. Details
7 Irms, both windings: Equal current when applied to each winding simultaneously that causes a 40°C temperature rise from 25°C ambient. Determine temperature rise.
8 Irms, one winding: Maximum current when applied to one winding that causes a 40°C temperature rise from 25°C ambient. Determine temperature rise.
9 Ambient temperature range: –40°C to +125°C with Irms current.
+125°C to +165°C with derated current Derating curve
10 Storage temperature range: Component: –40°C to +165°C
Tape and reel packaging: –40°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.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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Updated: August 08, 2016