DR Series
High Power Density, High Efficiency, Shielded Inductors
1207 BU-SB07327 Page 1 of 6 Data Sheet 4315
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
• 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
(1) Open Circuit Inductance Test Parameters: 100kHz, 0.25Vrms, 0.0Adc.
(2) RMS current for an approximate ∆Tof 40°Cwithout core loss. It is recommended that the
temperatureof 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
temperaturerise.
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
Part Number Rated OCL(1) Irms(2) Isat(3) DCR(4) Volt-µSec(5)
Inductance +/-20% Amps Amps (Ω
Ω) Typ.
(µH) (µH) Peak Typ.
DR73-R33-R 0.33 0.306 6.21 14.4 0.0073 1.98
DR73-1R0-R 1.00 0.992 5.28 7.97 0.0102 3.56
DR73-1R5-R 1.50 1.482 4.67 6.52 0.0130 4.36
DR73-2R2-R 2.20 2.070 4.15 5.52 0.0165 5.15
DR73-3R3-R 3.30 3.540 3.31 4.22 0.0259 6.73
DR73-4R7-R 4.70 4.422 3.09 3.78 0.0297 7.52
DR73-6R8-R 6.80 6.480 2.55 3.12 0.0435 9.11
DR73-8R2-R 8.20 8.930 2.19 2.66 0.0592 10.7
DR73-100-R 10.0 10.30 2.08 2.47 0.0656 11.5
DR73-150-R 15.0 15.01 1.83 2.05 0.0844 13.9
DR73-220-R 22.0 22.65 1.62 1.67 0.107 17.0
DR73-330-R 33.0 34.41 1.31 1.35 0.166 21.0
DR73-470-R 47.0 48.62 1.08 1.14 0.241 24.9
DR73-680-R 68.0 68.91 0.89 0.96 0.358 29.7
DR73-820-R 82.0 80.37 0.86 0.89 0.384 32.1
DR73-101-R 100 101.4 0.73 0.79 0.527 36.0
DR73-151-R 150 150.9 0.58 0.65 0.851 44.0
DR73-221-R 220 223.3 0.52 0.53 1.05 53.5
DR73-331-R 330 325.5 0.42 0.44 1.59 64.5
DR73-471-R 470 465.8 0.35 0.37 2.36 77.2
DR73-681-R 680 676.5 0.29 0.31 3.47 93.1
DR73-821-R 820 821.7 0.27 0.28 3.93 103
DR73-102-R 1000 995.0 0.26 0.25 4.34 113
1207 BU-SB07327 Page 2 of 6 Data Sheet 4315
Part Number Rated OCL(1) Irms(2) Isat(3) DCR(4) Volt-µSec(5)
Inductance +/-20% Amps Amps (Ω
Ω) Typ.
(µH) (µH) Peak Typ.
DR74-R33-R 0.33 0.294 6.26 18.4 0.0074 1.71
DR74-1R0-R 1.00 0.952 5.39 10.2 0.0099 3.08
DR74-1R5-R 1.50 1.422 4.94 8.35 0.0118 3.76
DR74-2R2-R 2.20 1.986 4.76 7.06 0.0126 4.45
DR74-3R3-R 3.30 3.396 3.94 5.40 0.0183 5.81
DR74-4R7-R 4.70 5.182 3.34 4.37 0.0254 7.18
DR74-6R8-R 6.80 7.344 2.60 3.67 0.0418 8.55
DR74-8R2-R 8.20 8.566 2.53 3.40 0.0441 9.23
DR74-100-R 10.0 9.882 2.41 3.17 0.0489 9.92
DR74-150-R 15.0 16.09 2.11 2.48 0.0637 12.7
DR74-220-R 22.0 21.73 1.75 2.13 0.0925 14.7
DR74-330-R 33.0 33.01 1.41 1.73 0.143 18.1
DR74-470-R 47.0 49.64 1.15 1.41 0.216 22.2
DR74-680-R 68.0 69.67 1.03 1.19 0.265 26.3
DR74-820-R 82.0 80.95 0.91 1.11 0.345 28.4
DR74-101-R 100 101.6 0.86 0.99 0.383 31.8
DR74-151-R 150 150.0 0.69 0.81 0.591 38.6
DR74-221-R 220 227.0 0.56 0.66 0.907 47.5
DR74-331-R 330 335.6 0.45 0.54 1.41 57.8
DR74-471-R 470 465.3 0.40 0.46 1.74 68.1
DR74-681-R 680 671.2 0.33 0.38 2.58 81.7
DR74-821-R 820 812.7 0.31 0.35 2.93 89.9
DR74-102-R 1000 1009 0.27 0.31 3.89 100
DR125-R47-R 0.47 0.456 17.6 33.0 0.0018 3.17
DR125-1R0-R 1.00 0.894 15.0 23.6 0.0024 4.43
DR125-1R5-R 1.50 1.478 13.8 18.3 0.0029 5.70
DR125-2R2-R 2.20 2.208 10.9 15.0 0.0045 6.97
DR125-3R3-R 3.30 3.084 9.26 12.7 0.0063 8.23
DR125-4R7-R 4.70 5.274 7.18 9.71 0.0105 10.8
DR125-6R8-R 6.80 6.588 6.64 8.68 0.0123 12.0
DR125-8R2-R 8.20 8.048 5.54 7.86 0.0176 13.3
DR125-100-R 10.0 9.654 5.35 7.17 0.0189 14.6
DR125-150-R 15.0 15.35 4.27 5.69 0.0298 18.4
DR125-180-R 18.0 17.70 3.81 5.32 0.0377 19.6
DR125-220-R 22.0 22.36 3.70 4.71 0.0396 22.2
DR125-330-R 33.0 33.74 3.28 3.84 0.0505 27.2
DR125-470-R 47.0 47.47 2.71 3.24 0.0740 32.3
DR125-560-R 56.0 55.24 2.31 3.00 0.102 34.8
DR125-680-R 68.0 67.91 2.22 2.70 0.101 38.6
DR125-820-R 82.0 86.89 2.05 2.39 0.128 43.7
DR125-101-R 100 102.7 1.78 2.20 0.170 47.5
DR125-151-R 150 151.1 1.48 1.81 0.248 57.6
DR125-221-R 220 216.8 1.19 1.51 0.384 69.0
DR125-331-R 330 332.6 1.06 1.22 0.482 85.5
DR125-471-R 470 473.1 0.87 1.02 0.718 102
DR125-681-R 680 679.8 0.70 0.85 1.10 122
DR125-821-R 820 828.0 0.60 0.77 1.49 135
DR125-102-R 1000 1008 0.57 0.70 1.69 149
DR125-472-R 4700 4720 0.268 0.32 7.53 322.4
DR125-124-R 120000 120630 0.060 0.069 150 1521
(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.
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
1207 BU-SB07327 Page 3 of 6 Data Sheet 4315
Part Number Rated OCL(1) Irms(2) Isat(3) DCR(4) Volt-µSec(5)
Inductance +/-20% Amps Amps (Ω
Ω) Typ.
(µH) (µH) Peak Typ.
DR127-R47-R 0.47 0.419 17.9 56.0 0.00195 3.50
DR127-1R0-R 1.00 0.821 15.5 40.0 0.00313 4.90
DR127-1R5-R 1.50 1.357 13.5 31.1 0.00341 6.30
DR127-2R2-R 2.20 2.027 12.5 25.5 0.00402 7.70
DR127-3R3-R 3.30 2.831 10.5 21.5 0.00567 9.10
DR127-4R7-R 4.70 4.841 8.25 16.5 0.00917 11.9
DR127-6R8-R 6.80 7.387 7.34 13.3 0.0116 14.7
DR127-8R2-R 8.20 8.861 6.32 12.2 0.0157 16.1
DR127-100-R 10.0 10.47 6.04 11.2 0.0172 17.5
DR127-150-R 15.0 14.09 5.03 9.66 0.0247 20.3
DR127-220-R 22.0 22.93 4.00 7.57 0.0391 25.9
DR127-330-R 33.0 33.92 3.23 6.22 0.0600 31.5
DR127-470-R 47.0 47.05 2.95 5.28 0.0719 37.1
DR127-680-R 68.0 66.48 2.44 4.44 0.105 44.1
DR127-820-R 82.0 79.75 2.09 4.06 0.143 48.3
DR127-101-R 100 99.31 1.96 3.64 0.163 53.9
DR127-151-R 150 144.9 1.59 3.01 0.247 65.1
DR127-221-R 220 221.5 1.29 2.43 0.376 80.5
DR127-331-R 330 323.6 1.04 2.01 0.574 97.3
DR127-471-R 470 467.1 0.85 1.68 0.861 117
DR127-681-R 680 676.7 0.76 1.39 1.08 141
DR127-821-R 820 818.1 0.65 1.27 1.47 155
DR127-102-R 1000 1005 0.61 1.14 1.66 172
(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.
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
1207 BU-SB07327 Page 4 of 6 Data Sheet 4315
DR127-###
wwllyy R
12
2
1
8.00
Max
10
12.50
Max
4.90
Typ
2.05
Typ.
112.50
Max
2
BOTTOM VIEW
TOP VIEW SCHEMATIC
5.50
3.85
13.80
RECOMMENDED PAD LAYOUT
FRONT VIEW
21
12.50
Max
6.00
Max DR125-###
wwllyy R
10
4.90
Typ
2.05
Typ.
112.50
Max
2
2
1
5.50
3.85
13.80
RECOMMENDED PAD LAYOUT SCHEMATIC
TOP VIEW
FRONT VIEW
BOTTOM VIEW
4.35
Max
FRONT VIEW
1.13
2.0 7.6
Max
7.6
Max
BOTTOM VIEW
DR74
###
TOP VIEW
8.50
RECOMMENDED PAD LAYOUT
2.50
3.25
SCHEMATIC
2
1
Dimensions - mm
DR73 Series
BOTTOM VIEW
1.13
6.0
2.0 7.6
Max
7.6 Max
FRONT VIEW
3.55
Max
8.50
RECOMMENDED PAD LAYOUT
DR73
###
TOP VIEW
2.50
3.25
SCHEMATIC
2
1
DR74 Series
DR125 Series
DR127 Series
Dimensions in millimeters. ### = Inductance value per family chart
wwllyy = (date code) R = revision level
1207 BU-SB07327 Page 5 of 6 Data Sheet 4315
A
A
SECTION A-A
Ko
Bo
2.00 ±0.1
4.00
Ø1.50 +0.1/-0.0
Ao
16.00
±0.3
7.50±0.1
1.75±0.10
Ø1.50 Min.
12.00
DR74
xxy
User direction of feed
1
2
DR74 Series
Supplied in tape and reel packaging,
1100 parts per reel, 13" diameter reel.
1
2
A
A
SECTION A-A
DR125-###
wwllyy R
K0
1.5 dia
+0.1/-0.0 1.5 dia
min
4.0
2.0
16.00
1.7
11.5
24.0
+/-0.3
User direction of feed
B0
A0
DR125 Series
Supplied in tape and reel packaging,
600 parts per reel, 13" diameter reel.
1
2
A
A
DR127-###
wwllyy R
SECTION A-A
K0
1.5 dia
+0.1/-0.0 1.5 dia
min
4.0
2.0
20.00
1.7
11.5
24.0
+/-0.3
User direction of feed
B0
A0
DR127 Series
Supplied in tape and reel packaging,
350 parts per reel, 13" diameter reel.
Packaging Information
A
A
SECTION A-A
Ko
Bo
2.00 ±0.1
4.00
Ø1.50 +0.1/-0.0
Ao
16.00
±0.3
7.50±0.1
1.75±0.10
Ø1.50 Min.
12.00
DR73
xxy
User direction of feed
1
2
DR73 Series
Supplied in tape and reel packaging,
1350 parts per reel, 13" diameter reel.
Dimensions are in millimeters.
ACTUAL SIZE
DR73
ACTUAL SIZE
DR74
ACTUAL SIZE
DR125
ACTUAL SIZE
DR127
Ao=7.90mm
Bo=7.90mm
Ko=3.80mm
Ao=7.90mm
Bo=7.90mm
Ko=4.70mm
Ao=13.0mm
Bo=13.0mm
Ko=6.30mm
Ao=13.0mm
Bo=13.0mm
Ko=8.30mm
©2007 Cooper Bussmann
St. Louis, MO 63178
www.cooperbussmann.com
1207 BU-SB07327 Page 6 of 6 Data Sheet 4315
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.
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
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#06-01 Pacific Tech Centre
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Tel: +65 278 6151
Fax: +65 270 4160
OCL vs Isat DR73
0
10
20
30
40
50
60
70
80
90
100
0 20 40 60 80 100 120 140 160
% of Isat
OCL (%)
OCL vs Isat DR74
0
20
40
60
80
100
0 20 40 60 80 100 120 140 160 180
% of Isat
OCL (%)
OCL vs Isat DR125
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
% of Isat
OCL (%)
10 100 1000
99
90
0
% of Applied Volt-µSecond
% of Losses from Irms (maximum)
300 kHz
200 kHz
100 kHz
50 kHz
25 kHz
Irms DERATING WITH CORE LOSS
92
94
96
98
70
50
30
10
80
97
95
60
8060403020 200 300 400 600 800
Inductance Characteristics
Core Loss