Specifications subject to change without notice.

Please check our website for latest information.

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© Coilcraft Inc. 2013

This product may not be used in medical or high

risk applications without prior Coilcraft approval.

Specification subject to change without notice.

Please check web site for latest information.

Document 621-1

Document 621-1 Revised 11/07/13

CoupledInductors–MSD7342

Dimensions are in

inches

mm

Core material Ferrite

Core and winding loss Go to online calculator

Terminations RoHS compliant matte tin over nickel over phos

bronze. Other terminations available at additional cost.

Weight 0.76 – 0.87g

Ambient temperature –40°C to +85°C with

Irms current, +85°C to

+125°C with derated current

Storage temperature Component: –40°C to +125°C.

Tape and reel packaging: –40°C to +80°C

Winding to winding isolation 200 Vrms

Resistance to soldering heat Max three 40 second reflows at

+260°C, parts cooled to room temperature between cycles

Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /

85% relative humidity)

Failures in Time (FIT) / Mean Time Between Failures (MTBF)

38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

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

PCB washing Tested with pure water or alcohol only. For other solvents,

see Doc787_PCB_Washing.pdf.

For Flyback, SEPIC

and other Applications

• Tightcoupling(k

≥0.97)and200VisolationmaketheMSD7342

series of coupled inductors ideal for use in a variety of circuits

including flyback, multi-output buck and SEPIC.

• They provide high inductance, high efficiency and excellent

current handling in a rugged, low cost part.

• Can also be used as two single inductors connected in series

or parallel, as a common mode choke or as a 1 : 1 transformer.

0.295

7,5

max

0.295

7,5

max

max

Dot indicates

pin 1

0.028

0,7

0.181

4,6

123

0.110

2,8

0.083

2,1

0.130

3,3

0.043

1,10

1

4

2

3

3

1

2

4

L1

L2

Recommended

Land Pattern

0.150

3,8

0.091

2,3

0.063

1,6

1

4

2

3

If board traces

are runin these

areas, consider

masking them to

prevent shorting.

L1

L2

+

+

–

–

D

C

C

Typical Flyback Converter

SW

L1

L2

++

+

––

–

D

D

C

C

SW

Typical Buck Converter with auxiliary output

Typical SEPIC schematic

AUX

L1

L2

Q

C1

C

++

––

D