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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
  • Need parts for space, military or other critical applications? See Coilcraft CPS 612PND series.

SPECIFICATIONS


Part number1
Click to get parts
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.
10 Storage temperature range: Component: −40°C to +165°C
Tape and reel packaging: −40°C to +80°C
11 Maximum part temperature: +165°C (Ambient + temperature rise)
12 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.
13 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: October 30, 2017