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DR Series
High Power Density, High Efficiency, Shielded Inductors
• 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 temperature range: -40°C to +125°C
(range is application specific)
• Solder reflow temperature: +260°C max. for 10 seconds max.
Packaging
• Supplied in tape and reel packaging, 1350 (DR73), 1100 (DR74),
600 (DR125), and 350 (DR127) per reel
Description
• 125°C maximum total operating temperature
• Four sizes of shielded drum core inductors
• Inductance range from 0.33µH to 1000µH
• Current range up to 56 amps peak
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
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
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
Irms(2)
Amps
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
(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.
(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.
1207
BU-SB07327
Page 1 of 6
Isat(3)
Amps
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
DCR(4)
Ω)
(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
6) Part number definition: DRxxx-yyy-R
DRxxx = product code and size,
-yyy = inductance value in µH,
R = decimal point. If no R is present, third character = # of zeros
-R suffix = RoHS compliant
Data Sheet 4315
Volt-µSec(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
Part Number
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
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
DR125-180-R
DR125-220-R
DR125-330-R
DR125-470-R
DR125-560-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
DR125-472-R
DR125-124-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
0.47
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
18.0
22.0
33.0
47.0
56.0
68.0
82.0
100
150
220
330
470
680
820
1000
4700
120000
Irms(2)
Amps
OCL(1)
+/-20%
(µH)
0.294
0.952
1.422
1.986
3.396
5.182
7.344
8.566
9.882
16.09
21.73
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
17.70
22.36
33.74
47.47
55.24
67.91
86.89
102.7
151.1
216.8
332.6
473.1
679.8
828.0
1008
4720
120630
6.26
5.39
4.94
4.76
3.94
3.34
2.60
2.53
2.41
2.11
1.75
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
3.81
3.70
3.28
2.71
2.31
2.22
2.05
1.78
1.48
1.19
1.06
0.87
0.70
0.60
0.57
0.268
0.060
(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.
(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.
1207
BU-SB07327
Page 2 of 6
Isat
Amps
Peak
18.4
10.2
8.35
7.06
5.40
4.37
3.67
3.40
3.17
2.48
2.13
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
5.32
4.71
3.84
3.24
3.00
2.70
2.39
2.20
1.81
1.51
1.22
1.02
0.85
0.77
0.70
0.32
0.069
(3)
DCR(4)
Ω)
(Ω
Typ.
0.0074
0.0099
0.0118
0.0126
0.0183
0.0254
0.0418
0.0441
0.0489
0.0637
0.0925
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
0.0377
0.0396
0.0505
0.0740
0.102
0.101
0.128
0.170
0.248
0.384
0.482
0.718
1.10
1.49
1.69
7.53
150
6) Part number definition: DRxxx-yyy-R
DRxxx = product code and size,
-yyy = inductance value in µH,
R = decimal point. If no R is present, third character = # of zeros
-R suffix = RoHS compliant
Data Sheet 4315
Volt-µSec(5)
Typ.
1.71
3.08
3.76
4.45
5.81
7.18
8.55
9.23
9.92
12.7
14.7
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
19.6
22.2
27.2
32.3
34.8
38.6
43.7
47.5
57.6
69.0
85.5
102
122
135
149
322.4
1521
Part Number
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)
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
Irms(2)
Amps
OCL(1)
+/-20%
(µH)
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
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
(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.
(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.
1207
BU-SB07327
Page 3 of 6
Isat
Amps
Peak
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
(3)
DCR(4)
Ω)
(Ω
Typ.
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
6) Part number definition: DRxxx-yyy-R
DRxxx = product code and size,
-yyy = inductance value in µH,
R = decimal point. If no R is present, third character = # of zeros
-R suffix = RoHS compliant
Data Sheet 4315
Volt-µSec(5)
Typ.
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
Dimensions - mm
DR73 Series
BOTTOM VIEW
TOP VIEW
FRONT VIEW
6.0
RECOMMENDED PAD LAYOUT
7.6
Max
2.0
1
2.50
7.6 Max
DR73
###
3.55
Max
SCHEMATIC
3.25
2
8.50
1.13
DR74 Series
BOTTOM VIEW
RECOMMENDED PAD LAYOUT
TOP VIEW
FRONT VIEW
7.6
Max
7.6
Max
2.0
1
2.50
DR74
###
4.35
Max
SCHEMATIC
3.25
2
1.13
8.50
DR125 Series
BOTTOM VIEW
FRONT VIEW
TOP VIEW
RECOMMENDED PAD LAYOUT
2.05
Typ.
SCHEMATIC
13.80
1
4.90 2
Typ
1
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 PAD LAYOUT
TOP VIEW
2.05
Typ.
4.90 2
Typ
1
10
12.50
Max
8.00
Max
1
12.50
Max
DR127-###
wwllyy R
1
5.50
2
3.85
BU-SB07327
2
### = Inductance value per family chart
wwllyy = (date code) R = revision level
Dimensions in millimeters.
1207
SCHEMATIC
13.80
Page 4 of 6
Data Sheet 4315
Packaging Information
DR73 Series
Supplied in tape and reel packaging,
1350 parts per reel, 13" diameter reel.
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
DR74 Series
Supplied in tape and reel packaging,
1100 parts per reel, 13" diameter reel.
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
A
Ao
Ko
Ao=7.90mm
Bo=7.90mm
Ko=4.70mm
SECTION A-A
User direction of feed
DR125 Series
4.0
Supplied in tape and reel packaging,
600 parts per reel, 13" diameter reel.
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
User direction of feed
DR127 Series
4.0
Supplied in tape and reel packaging,
350 parts per reel, 13" diameter reel.
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
2
A0
20.00
K0
SECTION A-A
A
User direction of feed
Dimensions are in millimeters.
1207
BU-SB07327
Page 5 of 6
Data Sheet 4315
ACTUAL SIZE
DR127
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
0
20
40
60
80
100
120
140
0
160
0
20
40
60
80
% of Isat
120
140
160
180
OCL vs Isat DR127
OCL vs Isat DR125
100
100
90
90
80
80
70
70
60
60
OCL (%)
OCL (%)
100
% 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
100
110
120
130
140
150
% Isat
Irms DERATING WITH CORE LOSS
Core Loss
0
10
30
60
70
kH
z
kH
z
25
10
50
Hz
0k
Hz
0k
30
0k
Hz
80
20
% of Losses from Irms (maximum)
50
90
92
94
95
96
97
98
99
10
20
30
40
60
80
100
200
300
400
600
800
1000
% of Applied Volt-µSecond
North America
Cooper Bussmann
1225 Broken Sound Parkway NW
Suite F
Boca Raton, FL 33487-3533
Tel: 1-561-998-4100
Fax: 1-561-241-6640
Toll Free: 1-888-414-2645
Cooper Bussmann
P.O. Box 14460
St. Louis, MO 63178-4460
Tel: 1-636-394-2877
Fax: 1-636-527-1607
Europe
Cooper Bussmann
Cooper (UK) Limited
Burton-on-the-Wolds
Leicestershire • LE12 5TH UK
Tel: +44 (0) 1509 882 737
Fax: +44 (0) 1509 882 786
Cooper Bussmann
Avda. Santa Eulalia, 290
08223
Terrassa, (Barcelona), Spain
Tel: +34 937 362 812
+34 937 362 813
Fax: +34 937 362 719
Asia Pacific
Cooper Bussmann
1 Jalan Kilang Timor
#06-01 Pacific Tech Centre
Singapore 159303
Tel: +65 278 6151
Fax: +65 270 4160
This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper Bussmann reserves the right, without notice,
to change design or construction of any products and to discontinue or limit distribution of any products. Cooper Bussmann 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 Bussmann 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.
© 2007 Cooper Bussmann
S t . L o u i s, M O 6 3 1 7 8
w w w. c o o p e r bu s s m a n n . c o m
1207
BU-SB07327
Page 6 of 6
Data Sheet 4315
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