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DR Series
High Power Density,
High Efficiency, Shielded Inductors
Description
RoHS
2002/95/EC
• 125°C maximum total temperature operation
• Four sizes of shielded drum core inductors
• Inductance range from 0.33uH to 1000uH
• Current range up to 56 Amps peak
• Magnetic shielding
• Secure mounting
• Ferrite core material
Applications
• Computer, DVD players, and portable power devices
• LCD panels
• DC-DC converters
• Buck, boost, forward, and resonant converters
• Noise filtering and filter chokes
Environmental Data
• Storage temperature range: -40°C to +125°C
• Operating ambient temperature range: -40°C to +125°C
(range is application specific)
• Solder reflow temperature: +260°C max. for 10 seconds
max.
Part Number
DR73-R33-R
DR73-1R0-R
DR73-1R5-R
DR73-2R2-R
DR73-3R3-R
DR73-4R7-R
DR73-6R8-R
DR73-8R2-R
DR73-100-R
DR73-150-R
DR73-220-R
DR73-330-R
DR73-470-R
DR73-680-R
DR73-820-R
DR73-101-R
DR73-151-R
DR73-221-R
DR73-331-R
DR73-471-R
DR73-681-R
DR73-821-R
DR73-102-R
DR74-R33-R
DR74-1R0-R
DR74-1R5-R
DR74-2R2-R
DR74-3R3-R
DR74-4R7-R
DR74-6R8-R
DR74-8R2-R
DR74-100-R
DR74-150-R
DR74-220-R
Rated
Inductance
(µH)
0.33
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
0.33
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
OCL(1)
+/-20%
(µH)
0.306
0.992
1.482
2.070
3.540
4.422
6.480
8.930
10.30
15.01
22.65
34.41
48.62
68.91
80.37
101.4
150.9
223.3
325.5
465.8
676.5
821.7
995.0
0.294
0.952
1.422
1.986
3.396
5.182
7.344
8.566
9.882
16.09
21.73
(1) Open Circuit Inductance Test Parameters: 100KHz, 0.25Vrms, 0.0Adc.
(2) RMS current for an approximate ∆T of 40°C without core loss. It is
recommended that the temperature of the part not exceed 125°C.
(3) Peak current for approximate 30% roll off at 20°C.
Packaging
• Supplied in tape and reel packaging, 1350 (DR73),
1100 (DR74), 600 (DR125), and 350 (DR127) per reel
Irms(2)
Amperes
6.21
5.28
4.67
4.15
3.31
3.09
2.55
2.19
2.08
1.83
1.62
1.31
1.08
0.89
0.86
0.73
0.58
0.52
0.42
0.35
0.29
0.27
0.26
6.26
5.39
4.94
4.76
3.94
3.34
2.60
2.53
2.41
2.11
1.75
Isat(3)
Amperes
Peak
14.4
7.97
6.52
5.52
4.22
3.78
3.12
2.66
2.47
2.05
1.67
1.35
1.14
0.96
0.89
0.79
0.65
0.53
0.44
0.37
0.31
0.28
0.25
18.4
10.2
8.35
7.06
5.40
4.37
3.67
3.40
3.17
2.48
2.13
DCR(4)
(Ω)
Typ.
0.0073
0.0102
0.0130
0.0165
0.0259
0.0297
0.0435
0.0592
0.0656
0.0844
0.107
0.166
0.241
0.358
0.384
0.527
0.851
1.05
1.59
2.36
3.47
3.93
4.34
0.0074
0.0099
0.0118
0.0126
0.0183
0.0254
0.0418
0.0441
0.0489
0.0637
0.0925
Volt-uSec(5)
Typ.
1.98
3.56
4.36
5.15
6.73
7.52
9.11
10.7
11.5
13.9
17.0
21.0
24.9
29.7
32.1
36.0
44.0
53.5
64.5
77.2
93.1
103
113
1.71
3.08
3.76
4.45
5.81
7.18
8.55
9.23
9.92
12.7
14.7
(4) DCR limits @ 20°C.
(5) Applied Volt-Time product (V-µS) across the inductor. This value represent the
applied V-µS at 100KHz necessary to generate a core loss equal to 10% of the
total losses for 40°C temperature rise.
DR Series
High Power Density,
High Efficiency, Shielded Inductors
Part Number
DR74-330-R
DR74-470-R
DR74-680-R
DR74-820-R
DR74-101-R
DR74-151-R
DR74-221-R
DR74-331-R
DR74-471-R
DR74-681-R
DR74-821-R
DR74-102-R
DR125-R47-R
DR125-1R0-R
DR125-1R5-R
DR125-2R2-R
DR125-3R3-R
DR125-4R7-R
DR125-6R8-R
DR125-8R2-R
DR125-100-R
DR125-150-R
DR125-220-R
DR125-330-R
DR125-470-R
DR125-680-R
DR125-820-R
DR125-101-R
DR125-151-R
DR125-221-R
DR125-331-R
DR125-471-R
DR125-681-R
DR125-821-R
DR125-102-R
DR125-124-R
DR127-R47-R
DR127-1R0-R
DR127-1R5-R
DR127-2R2-R
DR127-3R3-R
DR127-4R7-R
DR127-6R8-R
DR127-8R2-R
DR127-100-R
DR127-150-R
DR127-220-R
DR127-330-R
DR127-470-R
DR127-680-R
DR127-820-R
DR127-101-R
DR127-151-R
DR127-221-R
DR127-331-R
DR127-471-R
DR127-681-R
DR127-821-R
DR127-102-R
Rated
Inductance
(µH)
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
0.47
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
120000
0.47
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
OCL(1)
+/-20%
(µH)
33.01
49.64
69.67
80.95
101.6
150.0
227.0
335.6
465.3
671.2
812.7
1009
0.456
0.894
1.478
2.208
3.084
5.274
6.588
8.048
9.654
15.35
22.36
33.74
47.47
67.91
86.89
102.7
151.1
216.8
332.6
473.1
679.8
828.0
1008
120630
0.419
0.821
1.357
2.027
2.831
4.841
7.387
8.861
10.47
14.09
22.93
33.92
47.05
66.48
79.75
99.31
144.9
221.5
323.6
467.1
676.7
818.1
1005
(1) Open Circuit Inductance Test Parameters: 100KHz, 0.25Vrms, 0.0Adc.
(2) RMS current for an approximate ∆T of 40°C without core loss. It is
recommended that the temperature of the part not exceed 125°C.
(3) Peak current for approximate 30% roll off at 20°C.
Irms(2)
Amperes
1.41
1.15
1.03
0.91
0.86
0.69
0.56
0.45
0.40
0.33
0.31
0.27
17.6
15.0
13.8
10.9
9.26
7.18
6.64
5.54
5.35
4.27
3.70
3.28
2.71
2.22
2.05
1.78
1.48
1.19
1.06
0.87
0.70
0.60
0.57
0.060
17.9
15.5
13.5
12.5
10.5
8.25
7.34
6.32
6.04
5.03
4.00
3.23
2.95
2.44
2.09
1.96
1.59
1.29
1.04
0.85
0.76
0.65
0.61
Isat(3)
Amperes
Peak
1.73
1.41
1.19
1.11
0.99
0.81
0.66
0.54
0.46
0.38
0.35
0.31
33.0
23.6
18.3
15.0
12.7
9.71
8.68
7.86
7.17
5.69
4.71
3.84
3.24
2.70
2.39
2.20
1.81
1.51
1.22
1.02
0.85
0.77
0.70
0.069
56.0
40.0
31.1
25.5
21.5
16.5
13.3
12.2
11.2
9.66
7.57
6.22
5.28
4.44
4.06
3.64
3.01
2.43
2.01
1.68
1.39
1.27
1.14
DCR(4)
(Ω)
Typ.
0.143
0.216
0.265
0.345
0.383
0.591
0.907
1.41
1.74
2.58
2.93
3.89
0.0018
0.0024
0.0029
0.0045
0.0063
0.0105
0.0123
0.0176
0.0189
0.0298
0.0396
0.0505
0.0740
0.101
0.128
0.170
0.248
0.384
0.482
0.718
1.10
1.49
1.69
150
0.00195
0.00313
0.00341
0.00402
0.00567
0.00917
0.0116
0.0157
0.0172
0.0247
0.0391
0.0600
0.0719
0.105
0.143
0.163
0.247
0.376
0.574
0.861
1.08
1.47
1.66
Volt-uSec(5)
Typ.
18.1
22.2
26.3
28.4
31.8
38.6
47.5
57.8
68.1
81.7
89.9
100
3.17
4.43
5.70
6.97
8.23
10.8
12.0
13.3
14.6
18.4
22.2
27.2
32.3
38.6
43.7
47.5
57.6
69.0
85.5
102
122
135
149
1521
3.50
4.90
6.30
7.70
9.10
11.9
14.7
16.1
17.5
20.3
25.9
31.5
37.1
44.1
48.3
53.9
65.1
80.5
97.3
117
141
155
172
(4) DCR limits @ 20°C.
(5) Applied Volt-Time product (V-µS) across the inductor. This value represent the
applied V-µS at 100KHz necessary to generate a core loss equal to 10% of the
total losses for 40°C temperature rise.
DR Series
High Power Density,
High Efficiency, Shielded Inductors
Mechanical Diagrams
DR73 Series
BOTTOM VIEW
TOP VIEW
FRONT VIEW
6.0
RECOMMENDED PCB LAYOUT
7.6
Max
2.0
1
2.50
7.6 Max
3.55
Max
DR73
###
SCHEMATIC
3.25
2
8.50
1.13
DR74 Series
BOTTOM VIEW
RECOMMENDED PCB LAYOUT
TOP VIEW
FRONT VIEW
7.6
Max
7.6
Max
2.0
1
2.50
4.35
Max
DR74
###
SCHEMATIC
3.25
2
1.13
8.50
DR125 Series
BOTTOM VIEW
FRONT VIEW
TOP VIEW
RECOMMENDED PCB LAYOUT
2.05
Typ.
SCHEMATIC
13.80
1
4.90 1
Typ
2
12.50
Max
6.00
Max
1
DR125-###
wwllyy R
2
5.50
2
12.50
Max
3.85
10
DR127 Series
BOTTOM VIEW
FRONT VIEW
RECOMMENDED PCB LAYOUT
TOP VIEW
2.05
Typ.
4.90
Typ
SCHEMATIC
13.80
1
2
10
Dimensions in Millimeters.
12.50
Max
8.00
Max
1
12.50
Max
DR127-###
wwllyy R
1
5.50
2
3.85
2
### = Inductance value per family chart
wwllyy = (date code) R = revision level
DR Series
High Power Density,
High Efficiency, Shielded Inductors
Packaging Information
DR73 Series
Ø1.50 +0.1/-0.0
12.00
2.00 ±0.1
Ø1.50 Min.
A
4.00
1.75±0.10
1
7.50±0.1
DR73
xxy
Bo
16.00
±0.3
ACTUAL SIZE
DR73
2
A
Ao
Ko
Ao=7.90mm
Bo=7.90mm
Ko=3.80mm
User direction of feed
SECTION A-A
Parts packaged on 13" Diameter reel,
1,350 parts per reel.
DR74 Series
Ø1.50 +0.1/-0.0
12.00
2.00 ±0.1
Ø1.50 Min.
A
4.00
1.75±0.10
1
7.50±0.1
DR74
xxy
Bo
16.00
±0.3
ACTUAL SIZE
DR74
2
Ko
Ao=7.90mm
Bo=7.90mm
Ko=4.70mm
A
Ao
SECTION A-A
User direction of feed
Parts packaged on 13" Diameter reel,
1,100 parts per reel.
DR125 Series
4.0
1.5 dia
+0.1/-0.0
2.0
1.5 dia
min
A
1.7
1
11.5
DR125-###
wwllyy R
B0
24.0
+/-0.3
ACTUAL SIZE
DR125
2
Ao=13.0mm
Bo=13.0mm
Ko=6.30mm
A0
K0
A
16.00
SECTION A-A
Parts packaged on 13" Diameter reel,
600 parts per reel.
User direction of feed
DR127 Series
4.0
1.5 dia
+0.1/-0.0
2.0
1.5 dia
min
A
1.7
1
11.5
Ao=13.0mm
Bo=13.0mm
Ko=8.30mm
DR127-###
wwllyy R
B0
24.0
+/-0.3
ACTUAL SIZE
DR127
2
A0
K0
SECTION A-A
Dimensions are in millimeters.
20.00
A
User direction of feed
Parts packaged on 13" Diameter reel,
350 parts per reel.
DR Series
High Power Density,
High Efficiency, Shielded Inductors
Inductance Characteristics
OCL vs Isat DR74
OCL vs Isat DR73
100
100
90
80
80
60
OCL (%)
OCL (%)
70
50
40
60
40
30
20
20
10
0
20
0
40
60
80
100
120
140
0
160
20
0
% of Isat
40
60
100
120
140
160
180
OCL vs Isat DR127
OCL vs Isat DR125
100
100
90
90
80
80
70
70
60
60
OCL (%)
OCL (%)
80
% of Isat
50
40
50
40
30
30
20
20
10
10
0
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
0
150
0
10
20
30
40
50
60
% of Isat
70
80
90
% Idc sat
Core Loss
Irms DERATING WITH CORE LOSS
0
10
30
60
70
25
K
Hz
Hz
z
50
K
20
0
10
0
KH
KH
z
KH
z
80
30
0
% of Losses from Irms (maximum)
50
90
92
94
95
96
97
98
99
10
20
30
40
60
80
100
200
% of Applied Volt-µSecond
300
400
600
800
1000
100
110
120
130
140
150
DR Series
High Power Density,
High Efficiency, Shielded Inductors
PM-4310 3/07
© Cooper Electronic
Technologies 2007
Visit us on the Web at www.cooperbussmann.com
1225 Broken Sound Pkwy. Suite F Boca Raton, FL 33487
Tel: +1-561-998-4100 Toll Free: +1-888-414-2645 Fax: +1-561-241-6640
This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper Electronic
Technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper
Electronic Technologies also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been
selected, it should be tested by the user in all possible applications.
Life Support Policy: Cooper Electronic Technologies does not authorize the use of any of its products for use in life support devices or systems without the
express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when
properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.
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