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

LPD4012 Series

Shielded Coupled Power Inductors

These are new halogen-free parts, recommended for new designs. They are identical in form, fit and function to the old LPD4012 parts. Existing customers will continue to be supported. (View old data sheet here.)

Coilcraft LPD4012 Series surface-mount 1:1 coupled power inductors are ideal for Flyback, SEPIC, Cuk, Zeta and other applications. Their compact, low-profile design and magnetic shielding make them ideal for high-density circuits.

Low-profile design with smaller footprint than MSD Family
Ideal for Flyback, SEPIC, Ćuk, Zeta and other applications
Magnetically shielded to minimize EMI
AEC-Q200 Grade 1 (–40°C to +125°C)

See Selecting inductors for SEPIC

Need parts for space, military or other critical applications?
See Coilcraft AE416PJD Series | See Coilcraft ML416PJD Series | See Coilcraft MS416PJD Series

Buy Now:

Part number

Find my part

Count	Unit price
1	$1.10
250	$0.93
500	$0.69
1000	$0.52
2000	$0.44
5000	$0.39

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

Tolerance

M = 20%

Termination

R = Matte tin over nickel over silver

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
C463	41 (3 of each)	$160.00

Specifications

Electrical specifications at 25°C.

For Flyback Applications

Part number 1 (Hover for schematics)	Inductance (µH) 2	Tolerance (%)	DCR max (Ω) 3	Isolation Voltage (V)	Leakage Inductance (µH) 5	Turns Ratio
Part number 1 (Hover for schematics)	Inductance (µH) 2	Tolerance (%)	DCR max (Ω) 3	Isolation Voltage (V)	Leakage Inductance (µH) 5	Turns Ratio
LPD4012-331NR_	0.33	30	0.042	100	0.060	1 : 1
LPD4012-561NR_	0.56	30	0.087	100	0.080	1 : 1
LPD4012-821NR_	0.82	30	0.10	100	0.090	1 : 1
LPD4012-152NR_	1.5	30	0.19	100	0.11	1 : 1
LPD4012-222NR_	2.2	30	0.24	100	0.14	1 : 1
LPD4012-332NR_	3.3	30	0.32	100	0.16	1 : 1
LPD4012-472MR_	4.7	20	0.50	100	0.18	1 : 1
LPD4012-562MR_	5.6	20	0.62	100	0.20	1 : 1
LPD4012-682MR_	6.8	20	0.53	100	0.22	1 : 1
LPD4012-822MR_	8.2	20	0.60	100	0.24	1 : 1
LPD4012-103MR_	10	20	0.75	100	0.26	1 : 1
LPD4012-153MR_	15	20	1.1	100	0.30	1 : 1
LPD4012-223MR_	22	20	1.6	100	0.34	1 : 1
LPD4012-333MR_	33	20	1.8	100	0.41	1 : 1
LPD4012-473MR_	47	20	2.5	100	0.51	1 : 1
LPD4012-683MR_	68	20	3.2	100	0.66	1 : 1
LPD4012-823MR_	82	20	3.7	100	0.75	1 : 1
LPD4012-104MR_	100	20	4.8	100	0.86	1 : 1
LPD4012-124MR_	120	20	5.5	100	0.98	1 : 1
LPD4012-154MR_	150	20	6.9	100	1.2	1 : 1
LPD4012-184MR_	180	20	8.8	100	1.4	1 : 1
LPD4012-224MR_	220	20	11.2	100	1.7	1 : 1
LPD4012-334MR_	330	20	17.0	100	2.5	1 : 1

For SEPIC Applications

Part number 1 (Hover for schematics)	Inductance (µH) 2	Tolerance (%)	DCR max (Ω) 3	SRF typ (MHz) 4	Coupling coefficient	Leakage Inductance (µH) 5	Isat (A) 6			Irms (A)
Part number 1 (Hover for schematics)	Inductance (µH) 2	Tolerance (%)	DCR max (Ω) 3	SRF typ (MHz) 4	Coupling coefficient	Leakage Inductance (µH) 5	10% drop	20% drop	30% drop	both windings 7	one winding 8
LPD4012-331NR_	0.33	30	0.042	255	0.94	0.060	5.2	5.4	5.6	1.9	2.7
LPD4012-561NR_	0.56	30	0.087	185	0.95	0.080	3.7	3.8	3.9	1.3	1.8
LPD4012-821NR_	0.82	30	0.10	130	0.97	0.090	3.2	3.3	3.4	1.2	1.7
LPD4012-152NR_	1.5	30	0.19	86.0	0.97	0.11	2.5	2.8	2.9	1.2	1.6
LPD4012-222NR_	2.2	30	0.24	70.0	0.98	0.14	2.3	2.4	2.5	0.95	1.4
LPD4012-332NR_	3.3	30	0.32	48.0	0.98	0.16	1.8	1.9	2.0	0.75	1.1
LPD4012-472MR_	4.7	20	0.50	39.0	0.98	0.18	1.7	1.8	1.9	0.65	0.92
LPD4012-562MR_	5.6	20	0.62	32.0	0.99	0.20	1.6	1.7	1.8	0.55	0.78
LPD4012-682MR_	6.8	20	0.53	31.0	0.99	0.22	1.2	1.5	1.6	0.60	0.86
LPD4012-822MR_	8.2	20	0.60	29.0	0.99	0.24	1.1	1.2	1.3	0.55	0.78
LPD4012-103MR_	10	20	0.75	25.0	0.99	0.26	0.98	1.0	1.1	0.50	0.71
LPD4012-153MR_	15	20	1.1	21.0	0.99	0.30	0.90	0.92	0.93	0.43	0.60
LPD4012-223MR_	22	20	1.6	15.0	0.99	0.34	0.70	0.82	0.84	0.34	0.48
LPD4012-333MR_	33	20	1.8	12.0	>0.99	0.41	0.37	0.57	0.58	0.31	0.44
LPD4012-473MR_	47	20	2.5	8.8	>0.99	0.51	0.33	0.39	0.40	0.28	0.39
LPD4012-683MR_	68	20	3.2	7.8	>0.99	0.66	0.27	0.36	0.37	0.25	0.36
LPD4012-823MR_	82	20	3.7	7.3	>0.99	0.75	0.27	0.27	0.29	0.23	0.31
LPD4012-104MR_	100	20	4.8	6.1	>0.99	0.86	0.22	0.28	0.29	0.20	0.27
LPD4012-124MR_	120	20	5.5	5.3	>0.99	0.98	0.21	0.26	0.27	0.19	0.27
LPD4012-154MR_	150	20	6.9	4.6	>0.99	1.2	0.18	0.26	0.27	0.17	0.23
LPD4012-184MR_	180	20	8.8	4.1	>0.99	1.4	0.16	0.21	0.23	0.14	0.18
LPD4012-224MR_	220	20	11.2	3.3	>0.99	1.7	0.15	0.16	0.17	0.12	0.17
LPD4012-334MR_	330	20	17.0	2.8	>0.99	2.5	0.13	0.16	0.16	0.10	0.14

Notes

When ordering, please specify termination and packaging codes: e.g. LPD4012-564MRC
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. DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
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.
Isat: DC current, at which the inductance drops the specified amount from its value without current. It is the sum of the current flowing in both windings.
Irms, 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. Determine temperature rise.
Irms, one winding: 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. Determine temperature rise.

Termination:

R = Matte tin over nickel over silver.
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 (1000 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 (3500 parts per full reel).

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 + temperature 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
1000	3500*	178/330	60/100	13	18,4	12,4	12	8	4	2	1,45	0,25

* Special order

General specification

Core Material:

Ferrite

Weight:

54 - 64 mg

Packaging:

1000/7″ reel; 3500/13″ reel Plastic tape: 12 mm wide, 0.25 mm thick, 8 mm pocket spacing, 1.45 mm pocket depth

Winding to Winding Isolation:

100 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.

Recommended Pick & Place Nozzle:

OD: 4 mm; ID: ≤2 mm

PCB Washing:

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

LPD4012 Series

Shielded Coupled Power Inductors