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Close up of MSD7342
3D Model Datasheet S-Param

MSD7342 Series

Shielded Coupled Power Inductors

RoHS compliant AEC-Q flag

Coilcraft's MSD7342 Series of 1:1 coupled power inductors feature magnetic shielding for compact packaging and tight winding-to-winding coupling. They are ideal for Flyback, SEPIC, Ćuk, Zeta and other applications.

  • Ideal for Flyback, SEPIC, Ćuk, Zeta and other applications
  • Magnetic shielding allows high-density mounting
  • Tight winding coupling
  • Industry standard footprint
  • AEC-Q200 Grade 3 (−40°C to +85°C)
Need parts for space, military or other critical applications? See Coilcraft CPS 526PND series

See Selecting inductors for SEPIC

Need parts for space, military or other critical applications?
See Coilcraft ST526PND Series
Buy Now:
Find my part
Count Unit price
1 $2.99
250 $1.99
500 $1.19
1000 $0.93
2500 $0.80
5000 $0.74

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

. in stock, ready to ship today.
Request a Sample:
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Specifications

Electrical specifications at 25°C.

For Flyback Applications

Part number 1
(Hover for schematics)
Inductance (µH) 2
(Tolerance: ±20%) 		DCR max (Ω) 3 Isolation
Voltage (V) 		Leakage
Inductance (µH) 5 		Turns Ratio
MSD7342-252MLC 2.5 0.033 200 0.14 1 : 1
MSD7342-332MLC 3.3 0.037 200 0.090 1 : 1
MSD7342-472MLC 4.7 0.051 200 0.11 1 : 1
MSD7342-562MLC 5.6 0.063 200 0.090 1 : 1
MSD7342-682MLC 6.8 0.070 200 0.14 1 : 1
MSD7342-822MLC 8.2 0.075 200 0.25 1 : 1
MSD7342-103MLC 10 0.10 200 0.30 1 : 1
MSD7342-123MLC 12 0.12 200 0.36 1 : 1
MSD7342-153MLC 15 0.13 200 0.49 1 : 1
MSD7342-183MLC 18 0.17 200 0.16 1 : 1
MSD7342-223MLC 22 0.22 200 0.20 1 : 1
MSD7342-273MLC 27 0.25 200 0.20 1 : 1
MSD7342-333MLC 33 0.27 200 0.15 1 : 1
MSD7342-393MLC 39 0.38 200 0.70 1 : 1
MSD7342-473MLC 47 0.42 200 0.30 1 : 1
MSD7342-563MLC 56 0.46 200 0.50 1 : 1
MSD7342-683MLC 68 0.60 200 0.51 1 : 1
MSD7342-823MLC 82 0.68 200 1.2 1 : 1
MSD7342-104MLC 100 0.77 200 0.96 1 : 1
MSD7342-124MLC 120 1.0 200 0.61 1 : 1
MSD7342-154MLC 150 1.4 200 0.54 1 : 1
MSD7342-184MLC 180 1.5 200 0.75 1 : 1
MSD7342-224MLC 220 1.7 200 1.4 1 : 1
MSD7342-274MLC 270 2.4 200 1.6 1 : 1
MSD7342-334MLC 330 2.7 200 1.7 1 : 1
MSD7342-394MLC 390 3.1 200 4.7 1 : 1
MSD7342-474MLC 470 4.0 200 5.5 1 : 1
MSD7342-564MLC 560 4.4 200 4.9 1 : 1
MSD7342-684MLC 680 5.0 200 7.6 1 : 1
MSD7342-824MLC 820 6.8 200 8.0 1 : 1
MSD7342-105MLC 1000 7.8 200 8.7 1 : 1

For SEPIC Applications

Part number 1
(Hover for schematics)
Inductance (µH) 2
(Tolerance: ±20%) 		DCR max (Ω) 3 SRF typ (MHz) 4 Coupling coefficient Leakage
Inductance (µH) 5 		Isat (A) 6 Irms (A)
10% drop 20% drop 30% drop both windings 7 one winding 8
MSD7342-252MLC 2.5 0.033 55.0 0.97 0.14 6.0 6.2 6.3 2.2 3.1
MSD7342-332MLC 3.3 0.037 43.0 0.99 0.090 5.2 5.3 5.4 2.1 2.9
MSD7342-472MLC 4.7 0.051 35.0 0.99 0.11 4.1 4.3 4.6 1.7 2.5
MSD7342-562MLC 5.6 0.063 32.0 0.99 0.090 3.9 4.1 4.2 1.6 2.2
MSD7342-682MLC 6.8 0.070 30.0 0.99 0.14 3.7 3.8 3.9 1.5 2.1
MSD7342-822MLC 8.2 0.075 27.0 0.98 0.25 3.3 3.4 3.5 1.4 2.0
MSD7342-103MLC 10 0.10 22.0 0.98 0.30 2.8 2.9 3.0 1.2 1.8
MSD7342-123MLC 12 0.12 20.0 0.98 0.36 2.5 2.6 2.7 1.1 1.6
MSD7342-153MLC 15 0.13 18.0 0.98 0.49 2.2 2.3 2.4 1.1 1.5
MSD7342-183MLC 18 0.17 15.0 >0.99 0.16 2.0 2.2 2.3 0.95 1.4
MSD7342-223MLC 22 0.22 13.5 >0.99 0.20 1.9 2.0 2.1 0.84 1.2
MSD7342-273MLC 27 0.25 12.0 >0.99 0.20 1.7 1.8 1.9 0.79 1.1
MSD7342-333MLC 33 0.27 11.0 >0.99 0.15 1.5 1.6 1.7 0.76 1.1
MSD7342-393MLC 39 0.38 10.0 0.99 0.70 1.3 1.4 1.5 0.64 0.90
MSD7342-473MLC 47 0.42 9.5 >0.99 0.30 1.2 1.3 1.4 0.61 0.86
MSD7342-563MLC 56 0.46 8.7 >0.99 0.50 1.1 1.2 1.3 0.58 0.82
MSD7342-683MLC 68 0.60 7.3 >0.99 0.51 1.0 1.1 1.2 0.51 0.72
MSD7342-823MLC 82 0.68 6.2 0.99 1.2 0.90 1.0 1.1 0.48 0.67
MSD7342-104MLC 100 0.77 5.5 >0.99 0.96 0.80 0.92 0.98 0.45 0.63
MSD7342-124MLC 120 1.0 4.5 >0.99 0.61 0.70 0.80 0.90 0.39 0.55
MSD7342-154MLC 150 1.4 4.0 >0.99 0.54 0.65 0.76 0.80 0.34 0.48
MSD7342-184MLC 180 1.5 3.8 >0.99 0.75 0.62 0.66 0.73 0.32 0.45
MSD7342-224MLC 220 1.7 3.5 >0.99 1.4 0.59 0.62 0.66 0.30 0.42
MSD7342-274MLC 270 2.4 3.3 >0.99 1.6 0.55 0.57 0.60 0.25 0.36
MSD7342-334MLC 330 2.7 3.0 >0.99 1.7 0.49 0.52 0.54 0.24 0.34
MSD7342-394MLC 390 3.1 2.8 0.99 4.7 0.45 0.47 0.50 0.23 0.32
MSD7342-474MLC 470 4.0 2.6 0.99 5.5 0.41 0.43 0.46 0.20 0.28
MSD7342-564MLC 560 4.4 2.5 >0.99 4.9 0.38 0.40 0.42 0.19 0.26
MSD7342-684MLC 680 5.0 2.3 0.99 7.6 0.36 0.37 0.38 0.18 0.25
MSD7342-824MLC 820 6.8 2.2 >0.99 8.0 0.30 0.32 0.35 0.15 0.21
MSD7342-105MLC 1000 7.8 2.0 >0.99 8.7 0.27 0.29 0.31 0.14 0.20
Notes
  1. When ordering, please specify termination and packaging codes: MSD7342-105MLC.
  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.
  4. SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value.
  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.
  7. Irms, both windings: Equal current when applied to each winding simultaneously that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Determine temperature rise.
  8. Irms, one winding: Current when applied to one winding that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Determine temperature rise.

Termination:

  • L = 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:

  • C = 7″ machine-ready reel. EIA-481 embossed plastic tape (250 parts per full reel).
  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (1000 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).
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

Schematics

msd7342schem.gif

Physical characteristics

msd7342d-(1).gif

 

Tape and Reel specification

tapereel_pl-(26).gif

 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
7" (178 mm) 13" (330 mm) A B C D E W P Po P1 H T

part_or_ak-(8).gif
250 1000* 178/330 60/100 13 22,4 16,4 16 12 4 2 4,9 0,4
* Special order

General specification

Core Material:
Ferrite
Weight:
0.76 – 0.87g
Packaging:
250/7″ reel; 1000/13″ reel Plastic tape: 16 mm wide, 0.4 mm thick, 12 mm pocket spacing, 4.9 mm pocket depth
Winding to Winding Isolation:
200 Vrms, one minute

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:
PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.