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MSS1278 Series

Shielded Surface Mount Power Inductors

Coilcraft MSS1278 Series shielded surface-mount power inductors feature low DC resistance and excellent current handling in a wide range of inductance values, making them a cost-effective option for a variety of general-purpose applications.

Low-loss ferrite drum core for flat inductance vs current
Low DC resistance for greater efficiency
Excellent current handling
Magnetic shielding allows high-density mounting
AEC-Q200 Grade 3 (-40°C to +85°C)

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Count	Unit price
1	$2.29
250	$1.54
500	$0.93
1000	$0.73
2500	$0.62
5000	$0.58

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

Tolerance

M = 20%

K = 10%

Termination

L = Matte tin over nickel

Packaging

D = 13" machine-ready reel

B = Less than full reel

. in stock, ready to ship today.

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Designer's Kit:

Kit	Values	Price
C380	30 (3 of each)	$90.00

Specifications

Electrical specifications at 25°C.

Part number 1	Inductance (µH) 2	Tolerance (%)	DCR (mΩ) 3		SRF typ (MHz) 4	Isat (A) 5			Irms (A) 6
Part number 1	Inductance (µH) 2	Tolerance (%)	typ	max	SRF typ (MHz) 4	10% drop	20% drop	30% drop	20°C rise	40°C rise
MSS1278-142ML_	1.4	20	8.8	9.8	80.0	25.2	28.6	30.6	4.3	10.0
MSS1278-472ML_	4.7	20	13.9	15.5	30.0	13.7	15.2	15.9	4.3	6.2
MSS1278-562ML_	5.6	20	15.7	17.5	24.0	12.2	13.7	14.6	4.3	6.2
MSS1278-682ML_	6.8	20	19.1	21.3	21.0	11.3	12.7	13.7	4.2	6.0
MSS1278-822ML_	8.2	20	20.3	22.6	20.0	10.1	11.5	12.3	4.1	5.9
MSS1278-103ML_	10	20	21.8	24.3	17.0	9.4	10.6	11.2	4.0	5.7
MSS1278-123ML_	12	20	23.2	25.8	15.0	8.8	10.0	10.7	3.7	5.2
MSS1278-153ML_	15	20	27.9	31.0	13.0	7.3	8.4	9.0	3.5	4.9
MSS1278-183ML_	18	20	30.8	34.3	12.0	6.1	7.1	7.7	3.0	4.5
MSS1278-223ML_	22	20	35.5	39.5	11.0	6.0	6.8	7.2	2.9	4.0
MSS1278-273ML_	27	20	45.0	50.0	10.0	5.8	6.6	7.0	2.6	3.6
MSS1278-333ML_	33	20	61.9	68.8	9.5	5.2	5.9	6.3	2.3	3.1
MSS1278-393ML_	39	20	69.1	76.8	8.5	4.7	5.4	5.8	2.1	3.0
MSS1278-473ML_	47	20	72.3	80.4	7.5	4.4	5.0	5.3	2.0	2.9
MSS1278-563ML_	56	20	80.2	89.2	7.0	4.0	4.6	4.9	1.9	2.7
MSS1278-683ML_	68	20	91.3	102	6.5	3.4	3.9	4.3	1.8	2.6
MSS1278-823ML_	82	20	126	140	5.0	3.1	3.6	3.8	1.6	2.3
MSS1278-104ML_	100	20	135	150	4.5	2.9	3.3	3.5	1.5	2.2
MSS1278-124KL_	120	10	182	203	4.3	2.6	3.0	3.2	1.4	1.9
MSS1278-154KL_	150	10	217	241	4.1	2.5	2.9	3.0	1.3	1.8
MSS1278-184KL_	180	10	229	255	4.0	2.3	2.6	2.7	1.2	1.7
MSS1278-224KL_	220	10	324	360	3.4	2.0	2.2	2.4	1.0	1.6
MSS1278-274KL_	270	10	416	462	3.1	1.7	2.0	2.2	0.90	1.2
MSS1278-334KL_	330	10	487	542	2.9	1.7	1.9	2.0	0.80	1.0
MSS1278-394KL_	390	10	534	593	2.7	1.5	1.7	1.9	0.75	1.0
MSS1278-474KL_	470	10	708	786	2.2	1.3	1.5	1.6	0.66	0.90
MSS1278-564KL_	560	10	777	864	2.0	1.2	1.4	1.5	0.60	0.80
MSS1278-684KL_	680	10	1045	1162	1.7	1.2	1.3	1.4	0.55	0.75
MSS1278-824KL_	820	10	1166	1296	1.4	1.0	1.2	1.3	0.50	0.70
MSS1278-105KL_	1000	10	1334	1483	1.3	0.97	1.1	1.1	0.48	0.68

Notes

When ordering, please specify termination and packaging codes: e.g. MSS1278-105KLD
Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc using an Agilent/HP 4263B LCR meter or equivalent
DCR measured at 25°C on a micro-ohmmeter and a Coilcraft CCF858 test fixture. For other operating temperatures, use this DCR at Temperature calculator
SRF measured using an Agilent/HP 4191A or equivalent.
Isat: DC current at 25°C that causes the specified inductance drop from its value without current. Temperature derating curves.
Irms: Current that causes the specified temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Temperature derating curves.

Termination:

L = RoHS compliant 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:

D = 13″ machine-ready reel. EIA-481 embossed plastic tape (500 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). Derating.

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

See FIT/MTBF Calculations

Performance curves

Inductance vs. Current

Inductance vs. Frequency

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation ‡
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
500	330	100	13	30,4	24,4	24	16	4	2	8,7	0,5

‡ Part marking does not indicate polarity.

General specification

Core Material:

Ferrite

Weight:

3.8 - 4.6 g

Packaging:

500/13″ reel; Plastic tape: 24 mm wide, 0.5 mm thick, 16 mm pocket spacing, 8.7 mm pocket depth

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.

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MSS1278 Series

Shielded Surface Mount Power Inductors

Selected configuration not available

Specifications

Termination:

Packaging:

Performance curves

Inductance vs. Current

Inductance vs. Frequency

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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