3D Model Datasheet

MSS1278H-821

Name: MSS1278H-821MED
Brand: Coilcraft
SKU: MSS1278H-821MED
Price: 0.84 USD
Availability: InStock

MSS1278H-821MED

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Count	Unit price
1	$2.74
250	$1.78
500	$1.08
1000	$0.84
2500	$0.72
5000	$0.65

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

Termination

E = Matte tin over nickel

Packaging

D = 13" machine-ready reel

Tolerance

M = 20%

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Specifications

Electrical specifications at 25°C. Operating voltage 400 V max

Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR (mΩ) 3		SRF typ (MHz) 4	Isat (A) 5			Irms (A) 6
Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	typ	max	SRF typ (MHz) 4	10% drop	20% drop	30% drop	20°C rise	40°C rise
MSS1278H-821M_D	0.82	3.7	4.5	107	26.5	29.0	31.0	7.50	10.50

Notes

When ordering, please specify termination code: e.g. MSS1278H-105KED
Inductance measured at 100 kHz, 0.1 Vrms using a Coilcraft SMD-A fixture in an Agilent/HP 4263B LCR meter or equivalent.
DCR measured 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 8573D network analyzer or equivalent. Details
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:

E = 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).

Environmental

Environmental:

RoHS compliant , halogen free

Ambient temperature range:

–40°C to +125°C with (40°C rise) 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

Typical L vs Frequency

Typical L vs Current

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 g – 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.

Warehouses

Language settings

Currency settings

MSS1278H-821

MSS1278H-821MED

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Specifications

Termination:

Packaging:

Performance curves

Typical L vs Frequency

Typical L vs Current

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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