Surface Mount Power Toroidal Inductor
The Surface Mount Power Toroidal Inductors manufactured by Engineered Components Company
are designed using stable powdered iron core material. The toroidal core inductor design
provides a low external magnetic field and a high core saturation currents.
The standard inductance value tolerance is +/-10% when measured at 1 Khz, (I
DC
=0). Inductance
values and Q values are measured on an HP 4284A LCR meter. Since inductance values vary with
AC/DC current values, each end application should be evaluated to ensure proper readings. The
tabulated current ratings (Rated I
DC
)are those calculated to cause a 40 deg. C rise in case
temperature. These inductors are designed to meet the applicable portions of MIL-C-15305,
Grade 1, Class B. The operating temperature range is -55 to +125 deg. C. and the inductors are
capable of withstanding 500Vdc @ 50 uA applied between the coil and the case.
The inductor and the four phosphor-bronze leads (tin-lead plated) are mounted on a Liquid
Crystal Polymer platform, off-white in color, and secured in epoxy resin by utilizing a black Diallyl
Phthalate case. Marking, applied by Laser Label, designates one coil termination lead with an
indicator dot (see Figure 1). The opposite lead is also a coil temination lead, while the leads at
90 deg. locations are no-connection mounting leads.
Product Selection Table
PART NUMBER L(uH)
SMPT-1.8
1.8
SMPT-2.2
2.2
SMPT-2.7
2.7
SMPT-3.3
3.3
SMPT-3.9
3.9
SMPT-4.7
4.7
SMPT-5.6
5.6
SMPT-6.8
6.8
SMPT-8.2
8.2
SMPT-10
10.0
SMPT-12
12.0
SMPT-15
15.0
SMPT-18
18.0
SMPT-22
22.0
SMPT-27
27.0
SMPT-33
33.0
SMPT-39
39.0
SMPT-47
47.0
SMPT-56
56.0
SMPT-68
68.0
SMPT-82
82.0
SMPT-100
100.0
SMPT-120
120.0
SMPT-150
150.0
SMPT-180
180.0
SMPT-220
220.0
SMPT-270
270.0
SMPT-330
330.0
SMPT-390
390.0
SMPT-470
470.0
SMPT-560
560.0
SMPT-680
680.0
SMPT-820
820.0
SMPT-1000 1000.0
SMPT-1200 1200.0
SMPT-1500 1500.0
SMPT-1800 1800.0
A
0.315
0.315
0.415
0.415
0.415
0.415
0.415
0.415
0.415
0.415
0.470
0.470
0.470
0.570
0.570
0.620
0.620
0.620
0.670
0.670
0.670
0.670
0.820
0.820
0.820
1.070
1.070
1.070
1.188
1.188
1.370
1.370
1.688
1.688
1.875
1.875
1.875
B
0.270
0.270
0.320
0.320
0.320
0.320
0.320
0.320
0.320
0.320
0.340
0.340
0.340
0.390
0.390
0.425
0.425
0.425
0.425
0.425
0.425
0.425
0.485
0.485
0.485
0.530
0.530
0.530
0.670
0.670
0.740
0.740
0.805
0.805
0.835
0.835
0.835
C
0.290
0.290
0.390
0.390
0.390
0.390
0.390
0.390
0.390
0.390
0.445
0.445
0.445
0.545
0.545
0.595
0.595
0.595
0.645
0.645
0.645
0.645
0.795
0.795
0.795
1.045
1.045
1.045
1.163
1.163
1.345
1.345
1.663
1.663
1.850
1.850
1.850
.025 TYP.
.070 TYP.
SMPT-150
YYWW
DATE
CODE
FULL R.
TYP.
B
.050
A
C
Figure 1
Special modules can often be manufactured to provide for customer specific applications.
I
DC
(amps) readings for % drops
DCR(ohms) RATED I
DC
(amps) 10% DROP IN L 20% DROP IN L 30% DROP IN L
0.02
1.9
0.84
1.39
1.94
0.02
1.8
0.76
1.26
1.75
0.03
2.4
1.43
2.39
3.32
0.03
2.3
1.30
2.16
3.00
0.03
2.2
1.19
1.99
2.76
0.04
2.1
1.09
1.81
2.52
0.04
2.0
0.99
1.66
2.31
0.04
1.9
0.90
1.50
2.09
0.05
1.8
0.82
1.37
1.91
0.05
1.7
0.74
1.24
1.73
0.06
2.0
0.97
1.62
2.26
0.07
1.9
0.87
1.45
2.02
0.07
1.8
0.80
1.33
1.84
0.06
2.3
0.83
1.39
1.93
0.06
2.2
0.75
1.25
1.74
0.08
2.4
0.90
1.50
2.09
0.08
2.3
0.83
1.38
1.92
0.09
2.2
0.75
1.26
1.75
0.11
2.3
0.78
1.29
1.80
0.12
2.1
0.70
1.17
1.63
0.14
2.0
0.64
1.07
1.49
0.15
1.9
0.58
0.97
1.35
0.17
2.2
0.77
1.28
1.77
0.19
2.1
0.68
1.14
1.59
0.20
2.0
0.63
1.04
1.45
0.17
2.8
0.75
1.24
1.73
0.18
2.7
0.67
1.12
1.56
0.20
2.5
0.61
1.01
1.41
0.15
3.6
0.78
1.29
1.80
0.16
3.4
0.71
1.18
1.64
0.19
3.7
0.84
1.40
1.94
0.21
3.5
0.76
1.27
1.76
0.16
4.7
0.83
1.38
1.91
0.18
4.4
0.75
1.25
1.73
0.20
4.7
0.84
1.40
1.95
0.22
4.5
0.75
1.25
1.74
0.25
4.3
0.69
1.14
1.59
Phone: 805-369-0034
Fax:
805-369-0033
Web: www.ec2.com
engineered components company
A Division of Cornucopia Tool & Plastics, Inc. PO Box 1915, 448 Sherwood Rd., Paso Robles CA 93447
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