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SLR1050 Series

High Current Shielded Power Inductors

Coilcraft’s SLR1050 Series of high-current shielded power inductors feature sub-milliohm DC resistance and very high current handling. Magnetic shielding and tight DCR tolerances make them ideal for low voltage multi-phase VRM/VRD/EVRD regulators and current sensing circuits.

Tight DCR tolerance for inductor-DCR-based current sensing circuits
Three versions for optimal efficiency and accuracy
Ferrite construction for flat L vs I with high current
Magnetic shielding allows high-density packaging
Ideal for multi-phase VRM/VRD/EVRD regulators

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Part number

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Count	Unit price
1	$0.86
250	$0.75
500	$0.64
1000	$0.51
2500	$0.43
5000	$0.40

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

Tolerance

K = 10%

Termination

E = Matte tin over nickel

Packaging

C = 7" machine-ready reel

. in stock, ready to ship today.

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Part number

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Designer's Kit:

Kit	Values	Price
C467	40 (3 of each)	$110.00

Specifications

Electrical specifications at 25°C.

Lowest DCR

Part number 1	Inductance (nH) 2 (Tolerance: ±10%)	DCR ± 7.7% (mΩ) 3	SRF typ (MHz)	Isat (A) 4			Irms (A) 5
Part number 1	Inductance (nH) 2 (Tolerance: ±10%)	DCR ± 7.7% (mΩ) 3	SRF typ (MHz)	at 25°C	at 100°C	at 125°C	20°C rise	40°C rise
SLR1050A-850KE_	85	0.39	210	86.0	68.0	60.5	56.7	77.1
SLR1050A-101KE_	100	0.39	200	78.0	61.5	55.0	56.7	77.1
SLR1050A-121KE_	120	0.39	180	65.0	51.0	48.0	56.7	77.1
SLR1050A-151KE_	150	0.39	90	51.0	38.0	36.0	56.7	77.1
SLR1050A-221KE_	220	0.39	65	35.0	25.5	23.5	56.7	77.1

Balanced DCR/tolerance

Part number 1	Inductance (nH) 2 (Tolerance: ±10%)	DCR ± 6.7% (mΩ) 3	SRF typ (MHz)	Isat (A) 4			Irms (A) 5
Part number 1	Inductance (nH) 2 (Tolerance: ±10%)	DCR ± 6.7% (mΩ) 3	SRF typ (MHz)	at 25°C	at 100°C	at 125°C	20°C rise	40°C rise
SLR1050B-850KE_	85	0.47	210	86.0	68.0	60.5	48.8	67.2
SLR1050B-101KE_	100	0.47	200	78.0	61.5	55.0	48.8	67.2
SLR1050B-121KE_	120	0.47	180	65.0	51.0	48.0	48.8	67.2
SLR1050B-151KE_	150	0.47	90	51.0	38.0	36.0	48.8	67.2
SLR1050B-221KE_	220	0.47	65	35.0	25.5	23.5	48.8	67.2

Tightest DCR tolerance

Part number 1	Inductance (nH) 2 (Tolerance: ±10%)	DCR ± 5.4% (mΩ) 3	SRF typ (MHz)	Isat (A) 4			Irms (A) 5
Part number 1	Inductance (nH) 2 (Tolerance: ±10%)	DCR ± 5.4% (mΩ) 3	SRF typ (MHz)	at 25°C	at 100°C	at 125°C	20°C rise	40°C rise
SLR1050C-850KE_	85	0.55	210	86.0	68.0	60.5	46.7	65.0
SLR1050C-101KE_	100	0.55	200	78.0	61.5	55.0	46.7	65.0
SLR1050C-121KE_	120	0.55	180	65.0	51.0	48.0	46.7	65.0
SLR1050C-151KE_	150	0.55	90	51.0	38.0	36.0	46.7	65.0
SLR1050C-221KE_	220	0.55	65	35.0	25.5	23.5	46.7	65.0

Notes

When ordering, please specify packaging code: e.g. SLR1050C-221KEC
Inductance tested at 100 kHz, 0.1 Vrms using an Agilent/HP 4284.
DCR measured at 25°C on a micro-ohmmeter at the points indicated in the diagram. For other operating temperatures, use this DCR at Temperature calculator.
Isat: DC current that causes a 20% (typ) 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.
Irms testing was performed on 0.75 inch wide × 0.25 inch thick copper traces in still air. Temperature rise is highly dependent on many factors including pcb land pattern, trace size, and proximity to other components. Therefore temperature rise should be verified in application conditions.

Termination:

RoHS compliant matte tin over nickel over copper.

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).
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 C.
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 +85°C with 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

SLR1050A

Inductance vs. Frequency

SLR1050A

Inductance vs. Current

SLR1050B

Inductance vs. Frequency

SLR1050B

Inductance vs. Current

SLR1050C

Inductance vs. Frequency

SLR1050C

Temperature Rise vs. Current

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*	330	100	13	30,4	24,4	24	12	4	2	5.03	0,4

* Special order

General specification

Core Material:

Ferrite

Weight:

1.2 – 1.4 g

Packaging:

250/7″ reel; 1000/13″ reel; Plastic tape: 24 mm wide, 0.4 mm thick, 12 mm pocket spacing, 5.03 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.

SLR1050 Series

High Current Shielded Power Inductors