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Introduction
Specifications
Environmental
Performance curves
Schematics
Physical characteristics
Tape & Reel
Soldering/Washing

3D Model Datasheet

MSD1038V Series

Miniature High-Isolation Coupled Inductors

Coilcraft MSD1038V Series surface-mount 1:1 coupled power inductors feature higher isolation and are suitable for No-opto Isolated Flyback, Isolated Buck/Fly-BuckTM, SEPIC, Cuk, Zeta and other applications. Their compact, low-profile design and magnetic shielding make them ideal for a cost-effective alternative to custom core and bobbin transformers.

High isolation voltage, 2250 Vrms, one minute isolation (hipot) between primary and secondary windings
Ideal for use in a variety of circuits including flyback, multi-output buck, SEPIC, Ćuk and Zeta.
High efficiency and excellent current handling
Provides Functional Insulation
AEC-Q200 Grade 1 (–40°C to +125°C)

See Selecting inductors for SEPIC

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Part number

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Count	Unit price
1	$3.90
100	$3.19
250	$2.39
500	$1.43
1000	$1.11
2500	$0.96
5000	$0.88

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

Termination

E = Matte tin over nickel over phos bronze

Packaging

C = 7" machine-ready reel

Tolerance

K = 10%

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Specifications

Electrical specifications at 25°C.

For Flyback Applications

Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR max (Ω) 3	Isolation Voltage (V)	Leakage Inductance (µH) 5	Turns Ratio
Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR max (Ω) 3	Isolation Voltage (V)	Leakage Inductance (µH) 5	Turns Ratio
MSD1038V-103ME_	10	0.108	2250	0.50	1 : 1
MSD1038V-223ME_	22	0.240	2250	0.70	1 : 1
MSD1038V-333ME_	33	0.340	2250	0.80	1 : 1
MSD1038V-473ME_	47	0.460	2250	0.90	1 : 1
MSD1038V-683ME_	68	0.690	2250	1.0	1 : 1
MSD1038V-104ME_	100	0.950	2250	1.2	1 : 1
MSD1038V-124ME_	120	1.150	2250	1.3	1 : 1
MSD1038V-154ME_	150	1.350	2250	1.5	1 : 1

For SEPIC Applications

Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR max (Ω) 3	Coupling coefficient	Leakage Inductance (µH) 5	Isat (A) 6	Irms (A)
Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR max (Ω) 3	Coupling coefficient	Leakage Inductance (µH) 5	Isat (A) 6	both windings 7	one winding 8
MSD1038V-103ME_	10	0.108	≥0.95	0.50	4.7	2.75	3.9
MSD1038V-223ME_	22	0.240	≥0.96	0.70	3.1	1.3	1.8
MSD1038V-333ME_	33	0.340	≥0.96	0.80	2.6	1.0	1.45
MSD1038V-473ME_	47	0.460	≥0.96	0.90	2.2	0.92	1.3
MSD1038V-683ME_	68	0.690	≥0.96	1.0	1.8	0.78	1.1
MSD1038V-104ME_	100	0.950	≥0.96	1.2	1.5	0.67	0.95
MSD1038V-124ME_	120	1.150	≥0.96	1.3	1.3	0.53	0.75
MSD1038V-154ME_	150	1.350	≥0.96	1.5	1.2	0.46	0.65

Notes

When ordering, please specify termination and packaging codes: e.g. MSD1038V-154KEC
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.
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.
SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value.
Leakage Inductance is for L1 and is measured with L2 shorted.
DC current at 25°C that causes a 30% (typ) inductance drop from its value without current. It is the sum of the current flowing in 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. To predict temperature rise go to online calculator.
Maximum 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. To predict temperature rise go to online calculator.

Termination:

E = RoHS compliant matte tin over nickel over phos bronze.
Q = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
P = 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). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
D = 13″ machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (1000 parts per full reel)

Environmental

Environmental:

RoHS compliant , halogen free

Ambient temperature range:

–40°C to +125°C with Irms current.

Storage temperature range:

Component: –40°C to +165°C.
Tape and reel packaging: –40°C to +80°C

Maximum part temperature:

+165°C (ambient + temp rise).

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

See FIT/MTBF Calculations

Performance curves

Inductance vs Current

Inductance vs. Frequency

Schematics

Physical characteristics

Tape and Reel specification

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
250	1000*	178/330	60/100	13	30,4	24,4	24	16	4	2	4,3	0,35

* Special order

General specification

Core Material:

Ferrite

Weight:

1.2– 1.5 g

Packaging:

250/7″ reel; 1000/13″ reel Plastic tape: 24 mm wide, 0.35 mm thick, 16 mm pocket spacing, 4.3 mm pocket depth.

Winding to Winding Isolation:

2250 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:

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

MSD1038V Series

Miniature High-Isolation Coupled Inductors