DRA Series
High Power Density,
High Efficiency, Shielded Inductors
Magnetics Solutions
For Automotive Applications
(1) Open Circuit Inductance test parameters: 100kHz, 0.25V, 0.0Adc,
tolerance is ±20%
(2) Irms: DC current for an approximate ∆T of 40°C without core loss. Derating is
necessary for AC currents. PCB layout, trace thickness and width, air-flow, and
proximity of other heat generating components will affect the temperature rise. It
is recommended that the temperature of the part not exceed 165°C under worst
case operating conditions verified in the end application.
(3) Isat Amperes peak for approximately 30% rolloff (@25°C)
(4) Isat Amperes peak for approximately 40% rolloff (@125°C)
(5) DCR limits @ 25°C
(6) K-factor: Used to determine B p-p for core loss (see graph).
B p-p = K*L*∆I, B p-p(mT), K: (K factor from table), L: (Inductance in µH),
∆I (Peak to peak ripple current in Amps).
(7) Part Number Definition: DRAxxx-xxx-R
DRAxxx = Product code and size; -xxx = Inductance value in uH;
R = decimal point; If no R is present, third character = # of zeros.
-R suffix = RoHS compliant
Part Number Rated OCL (1) Irms (2) Isat (3) Isat (4) DCR (5) K-factor (6)
Inductance µH Amperes Amperes Amperes (Ω)
+/-20% Typ.
DRA74-R33-R 0.33 0.288 7.26 18.40 14.72 0.0054 52.6
DRA74-1R0-R 1.00 0.897 6.01 10.22 8.18 0.0078 29.2
DRA74-1R5-R 1.50 1.31 5.55 8.36 6.69 0.0092 23.9
DRA74-2R2-R 2.20 2.33 4.82 6.13 4.91 0.012 17.5
DRA74-3R3-R 3.30 3.05 4.16 5.41 4.33 0.016 15.5
DRA74-4R7-R 4.70 4.68 3.41 4.38 3.50 0.024 12.5
DRA74-6R8-R 6.80 6.51 2.91 3.68 2.94 0.034 10.5
DRA74-8R2-R 8.20 8.51 2.66 3.17 2.54 0.040 9.1
DRA74-100-R 10.0 9.62 2.56 2.97 2.37 0.043 8.5
DRA74-150-R 15.0 15.14 2.06 2.36 1.89 0.067 6.7
DRA74-220-R
22.0 22.25 1.68 1.96 1.57 0.100 5.6
DRA74-330-R
33.0 33.21 1.37 1.61 1.29 0.151 4.6
DRA74-470-R 47.0 46.56 1.14 1.37 1.099 0.219 3.9
DRA74-680-R
68.0 68.37 0.996 1.108 0.887 0.286 3.2
DRA74-820-R 82.0 81.45 0.879 1.034 0.827 0.367 3.0
DRA74-101-R 100 98.5 0.822 0.929 0.743 0.419 2.7
DRA74-151-R
150 150.9 0.661 0.748 0.598 0.648 2.1
DRA74-221-R 220 218.9 0.544 0.626 0.501 0.96 1.8
DRA74-331-R 330 328.9 0.435 0.514 0.411 1.50 1.5
DRA74-471-R 470 471.5 0.383 0.420 0.336 1.93 1.2
DRA74-681-R 680 682.8
0.315 0.352 0.282 2.86 1.0
DRA74-821-R 820 815.0 0.279 0.327 0.262 3.63 0.9
DRA74-102-R 1000 1001.7 0.260
0.292
0.234 4.19 0.8
DRA124-R47-R 0.47 0.423 15.15 30.80 24.6 0.0019 16.7
DRA124-1R0-R 1.00 0.821 11.65 22.00
17.6
0.0031 12.0
DRA124-1R5-R 1.50 1.36 9.36 17.11 13.7 0.0049 9.3
DRA124-2R2-R 2.20 2.04 7.64 14.00 11.2 0.007 7.6
DRA124-3R3-R 3.30 2.79 6.94 11.85 9.48 0.009 6.4
DRA124-4R7-R 4.70 4.74 5.47 9.06 7.25 0.014 4.9
DRA124-6R8-R 6.80 7.28 4.46 7.33 5.87 0.021 4.0
DRA124-8R2-R 8.20 8.88 3.87 6.70 5.36 0.028 3.6
DRA124-100-R 10.0 10.37 3.67 6.16 4.93 0.031 3.3
DRA124-150-R 15.0 14.10 3.10 5.31 4.25 0.044 2.9
DRA124-220-R 22.0 23.00 2.44 4.16 3.33 0.071 2.3
DRA124-330-R 33.0 34.13 1.98 3.42 2.74 0.108 1.9
DRA124-470-R 47.0
46.27
1.78 2.91 2.325 0.134 1.6
DRA124-680-R
68.0
69.77
1.454
2.369
1.895
0.201 1.3
DRA124-820-R
82.0
80.57
1.285 2.232 1.786 0.257 1.2
DRA124-101-R
100
98.8
1.199 2.000 1.600 0.296 1.1
DRA124-151-R
150
151.7
0.967
1.621
1.297
0.454
0.9
DRA124-221-R 220 209.6 0.865 1.363 1.090 0.568 0.7
DRA124-331-R
330 326.9 0.690 1.092 0.874 0.892 0.6
DRA124-471-R
470
473.0
0.568
0.911 0.729 1.32 0.5
DRA124-681-R
680
682.1
0.466
0.759
0.607
1.96
0.4
DRA124-821-R 820 826.7 0.406 0.697 0.557 2.57 0.4
DRA124-102-R
1000
1001.0 0.380 0.629 0.503 2.94 0.3
DRA125-R47-R
0.47
0.453
18.47
33.20
26.56
0.0016 16.7
DRA125-1R0-R
1.00
0.854
15.94
23.71
18.97
0.0021
12.0
DRA125-1R5-R 1.50 1.41 12.89 18.44 14.76 0.0033 9.3
DRA125-2R2-R
2.20
2.12
10.61 15.09 12.07 0.0048 7.6
DRA125-3R3-R
3.30
2.89
9.69
12.77
10.22
0.0058
6.4
DRA125-4R7-R 4.70 4.90 7.67 9.76 7.81 0.0092 4.9
DRA125-6R8-R
6.80 6.23 6.81 8.74 6.99 0.012 4.4
DRA125-8R2-R
8.20
7.49
6.41
7.90 6.32 0.013 4.0
DRA125-100-R
10.0
9.22
5.57
7.22
5.77
0.017
3.6