SPT Series

High Current Surface Mount Power Inductors

The Coilcraft SPT Series of high current surface mount (SM) toroidal power inductors have very high current ratings - up to 12.2 Amps. The toroidal construction provides magnetic shielding that eliminates EMI and allows for closer component placement.

Very high current ratings - up to 12.2 Amps Isat
Toroid winding virtually eliminates stray electromagnetic emissions
Flat top and self-leaded design for reliable surface mounting

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Count	Unit price
1	$2.02
375	$1.66
750	$1.05
1500	$0.92
3000	$0.79
6000	$0.73

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

Tolerance

M = 20%

Termination

L = Tin-silver

Packaging

D = 13" machine-ready reel

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Specifications

Electrical specifications at 25°C.

Standard series

Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR max (mΩ) 3	SRF typ (MHz) 4	Isat (A) 5			Irms (A) 6		Body size
Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR max (mΩ) 3	SRF typ (MHz) 4	10% drop	20% drop	30% drop	20°C rise	40°C rise	Body size
SPT20L-112MLD	1.1	16.0	130	3.2	4.8	6.7	4.7	6.1	1
SPT38L-382MLD	3.8	9.3	61	4.0	6.1	8.2	6.5	8.5	3
SPT30L-522MLD	5.2	24.2	47	2.8	4.2	5.8	4.2	5.7	2
SPT20L-702MLD	7.0	95.0	37	1.2	1.8	2.5	1.8	2.2	1
SPT38L-752MLD	7.5	22.8	50	2.7	4.2	5.8	4.4	6.5	3
SPT44L-792MLD	7.9	16.2	26	3.5	5.4	7.3	5.6	7.5	4
SPT30L-123MLD	12	54.7	23.9	1.9	2.8	3.7	2.5	3.3	2
SPT44L-143MLD	14	23.6	15.6	2.8	4.1	5.7	4.2	5.7	4
SPT50L-163MLD	16	19.7	14.3	2.8	4.2	5.8	5.1	7.1	5
SPT38L-223MLD	22	63.0	18.1	1.5	2.3	3.1	3.1	3.7	3
SPT20L-233MLD	23	320	13.5	0.60	1.0	1.3	0.71	1.0	1
SPT50L-263MLD	26	32.0	11.2	2.3	3.4	4.6	4.3	6.0	5
SPT30L-353MLD	35	166	11	1.1	1.6	2.2	1.3	1.6	2
SPT44L-413MLD	41	85.0	8.3	1.6	2.3	3.1	2.3	3.1	4
SPT38L-733MLD	73	290	4.56	0.81	1.3	1.7	1.1	1.5	3
SPT50L-733MLD	73	133	10.8	1.4	2.0	2.7	2.6	3.5	5
SPT30L-174MLD	170	640	3.84	0.44	0.68	0.95	0.70	0.80	2
SPT38L-294MLD	290	657	2.87	0.41	0.64	0.90	0.70	1.0	3
SPT50L-564MLD	560	550	1.54	0.37	0.59	0.81	0.70	0.90	5
SPT38L-674MLD	670	1200	1.38	0.26	0.40	0.55	0.48	0.60	3
SPT44L-115MLD	1100	1908	1.35	0.25	0.41	0.57	0.57	0.50	4
SPT50L-205MLD	2000	1932	1.35	0.18	0.29	0.41	0.56	0.70	5

High current series

Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR max (mΩ) 3	SRF typ (MHz) 4	Isat (A) 5			Irms (A) 6		Body size
Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR max (mΩ) 3	SRF typ (MHz) 4	10% drop	20% drop	30% drop	20°C rise	40°C rise	Body size
SPT44H-282MLD	2.8	4.6	74	5.8	8.8	12.2	9.7	13.6	6
SPT44H-422MLD	4.2	6.6	72	5.0	7.8	10.9	8.8	11.8	6
SPT50H-652MLD	6.5	7.2	27.3	4.6	6.7	9.1	8.6	11.7	7
SPT50H-842MLD	8.4	8.5	22.8	4.3	6.4	8.5	7.1	9.8	7
SPT68H-113MLD	11	8.2	25.9	4.8	7.2	9.9	8.3	11.2	8
SPT68H-183MLD	18	12.5	12	3.9	5.7	7.7	6.8	9.2	8

Notes

When ordering, please specify packaging code: e.g. SPT20L-112MLD
Inductance tested at 100 kHz, 0.1 Vrms on an Agilent/HP 4192A impedance analyzer.
DCR measured at 25°C on a micro-ohmmeter. For other operating temperatures, use this DCR at Temperature calculator.
SRF measured using Agilent/HP8753ES network analyzer.
Isat: DC current at which the inductance drops the specified amount from its value without current.
Irms: Current that causes the specified temperature rise from 25°C ambient.

Termination:

L = RoHS compliant tin-silver over copper.
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. Body size 1: 750 per full reel. Body sizes 2–3: 350 per full reel. Body size 4: 300 per full reel. Body sizes 5–6: 250 per full reel. Body sizes 7–8: 200 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

Storage temperature range:

Component: –40°C to +85°C.
Packaging: –40°C to +80°C

Maximum part temperature:

The part temperature should not exceed +85°C (ambient + self-heating). Prolonged operation above +85°C may result in a permanent increase in core loss and part failure due to thermal aging of the core material.

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

See FIT/MTBF Calculations

Performance curves

Temperature Rise vs. Current

SPT20L Standard Series

Temperature Rise vs. Current

>SPT30L Standard Series

Temperature Rise vs. Current

SPT38L Standard Series

Temperature Rise vs. Current

SPT44H Standard Series

Temperature Rise vs. Current

SPT44L Standard Series

Temperature Rise vs. Current

SPT50H Standard Series

Temperature Rise vs. Current

SPT50L Standard Series

Temperature Rise vs. Current

SPT68H Standard Series

Inductance vs. Current

High Current Series

Inductance vs. Current

SPT Standard Series

Physical characteristics

Body size 1-5 (Standard series)

Size	A max	B max	C max	D1	E2	F2	G	Weight (g)
1 (SPT20L)	0.34/8,64	0.34/8,64	0.28/7,00	0.26/6,60	0.30/7,62	0.27/6,86	0.06/1,52	0.47 – 0.54
2 (SPT30L)	0.44/11,05	0.44/11,18	0.37/9,50	0.35/8,89	0.40/10,16	0.36/9,14	0.06/1,52	1.42 – 1.59
3 (SPT38L)	0.56/14,22	0.56/14,35	0.37/9,50	0.45/11,43	0.52/13,21	0.46/11,68	0.06/1,52	2.73 – 3.34
4 (SPT44L)	0.59/14,99	0.61/15,62	0.41/10,50	0.50/12,70	0.55/13,97	0.51/12,95	0.06/1,52	3.57 – 4.08
5 (SPT50L)	0.67/17,02	0.70/17,78	0.41/10,50	0.58/14,73	0.62/15,75	0.59/14,99	0.06/1,52	5.19 – 5.97

Dimensions are in inches/mm. Unless specified, tolerance is ± 0.009/0,25
1 ±0.030 / 0,76
2 ± 0.005 / 0,13

Body size 6-8 (High current series)

Size	A max	B max	C max	D1	E2	F2	G	Weight (g)
6 (SPT44H)	0.66/16,89	0.66/16,89	0.41/10,50	0.56/14,22	0.49/12,45	0.57/14,48	0.08/2,03	4.23 – 4.48
7 (SPT50H)	0.74/18,80	0.74/18,80	0.41/10,50	0.63/16,00	0.56/14,22	0.64/16,26	0.08/2,03	6.18 – 6.53
8 (SPT68H)	0.94/23,88	0.94/23,88	0.41/10,50	0.82/20,83	0.70/17,78	0.83/21,08	0.08/2,03	11.12 – 11.63

Dimensions are in inches/mm. Unless specified, tolerance is ± 0.009/0,25
1 ± 0.015/0,38
2 ± 0.005/0,13