Technical Data 4315 Effective September 2017
Supersedes April 2014
Product features
•Four sizes of shielded drum core inductors
•Inductance range from 0.33 µH to 1000 µH
•Current range up to 56 A peak
•Magnetically shielded
•Secure mounting
•Ferrite core material
Applications
•Storage temperature range (component):
-40 °C to +125 °C
•Operating temperature range: -40 °C to +125 °C
(ambient plus self-temperature rise)
•Solder reflow temperature:
J-STD-020 (latest revision) compliant
DR
High power density, high efficiency, shielded drum core
power inductors
Pb
HALOGEN
HF
FREE
•Desktop and servers
•DVD and media players
•Portable and handheld devices
•LCD panels
•DC-DC converters
•Buck, boost, forward, and resonant converters
•Noise filtering and filter chokes
Environmental data
2
Technical Data 4315
Effective September 2017
DR
High power density, high efficiency, shielded drum core power inductors
www.eaton.com/electronics
Product specifications
1. Open Circuit Inductance Test Parameters: 100 kHz, 0.25 Vrms, 0.0 Adc.
2. RMS current for an approximate DT 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-μsec 100 kHz 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
Part Number
Rated
Inductance
(μH)
OCL1
±20%
(μH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR4
(Ω)
Typ.
Volt-μsec5
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
Technical Data 4315
Effective September 2017
DR
High power density, high efficiency, shielded drum core power inductors
3
www.eaton.com/electronics
Product specifications
1. Open Circuit Inductance Test Parameters: 100 kHz, 0.25 Vrms, 0.0 Adc.
2. RMS current for an approximate DT 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-μsec 100 kHz 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
Part Number
Rated
Inductance
(μH)
OCL1
±20%
(μH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR4
(Ω)
Typ.
Volt-μsec5
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
Technical Data 4315
Effective September 2017
DR
High power density, high efficiency, shielded drum core power inductors
4www.eaton.com/electronics
Part Number
Rated
Inductance
(μH)
OCL1
±20%
(μH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR4
(Ω)
Typ.
Volt-μsec5
Typ.
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: 100 kHz, 0.25 Vrms, 0.0 Adc.
2. RMS current for an approximate DT 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-μsec 100 kHz 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
Product specifications
Technical Data 4315
Effective September 2017
DR
High power density, high efficiency, shielded drum core power inductors
5
www.eaton.com/electronics
Part Number
Rated
Inductance
(μH)
OCL1
±20%
(μH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR4
(Ω)
Typ.
Volt-μsec5
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
Product specifications
1. Open Circuit Inductance Test Parameters: 100 kHz, 0.25 Vrms, 0.0 Adc.
2. RMS current for an approximate DT 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-μsec 100 kHz 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
Technical Data 4315
Effective September 2017
DR
High power density, high efficiency, shielded drum core power inductors
6www.eaton.com/electronics
Dimensions - mm
DR73
BOTTOM VIEW
1.13
6.0
2.07.6
Max
7.6 Max
FRONT VIEW
3.55
Max
8.50
RECOMMENDED PAD LAYOUT
DR73
###
wllyy R
TOP VIEW
2.50
3.25
SCHEMATIC
2
1
4.35
Max
FRONT VIEW
1.13
2.07.6
Max
7.6
Max
BOTTOM VIEW TOP VIEW
8.50
RECOMMENDED PAD LAYOUT
2.50
3.25
SCHEMATIC
2
1
DR74
DR74
###
wllyy R
21
12.50
Max
6.00
MaxDR125- ###
wwllyy R
10
4.90
Ty p
2.05
Ty p.
112.50
Max
2
2
1
5.50
3.85
13.80
RECOMMENDED PAD LAYOUT SCHEMATIC
TOP VIEW
FRONT VIEW
BOTTOM VIEW
DR125
DR127-###
wwllyy R
12
2
1
8.00
Max
10
12.50
Max
4.90
Ty p
2.05
Ty p.
112.50
Max
2
BOTTOM VIEW TOP VIEW SCHEMATIC
5.50
3.85
13.80
RECOMMENDED PAD LAYOUT
FRONT VIEW
DR127
### = Inductance value per family chart
wllyy and wwllyy = (date code) R = revision level
Technical Data 4315
Effective September 2017
DR
High power density, high efficiency, shielded drum core power inductors
7
www.eaton.com/electronics
A
A
SECTION A-A
Ko
Bo
2.00 ±0.1
4.00
Ø1.50 +0.1/-0.0
Ao
±0.3
7.50±0.1
1.75±0.10
Ø1.50 Min.
12.00
User direction of feed
1
2
Packaging information - mm
DR73
Supplied in tape and reel packaging,
1350 parts per reel, 13" diameter reel.
ACTUAL SIZE
DR73
Ao=7.90mm
Bo=7.90mm
Ko =3.80mm
DR73
###
wllyy R
A
A
SECTION A-A
Ko
Bo
2.00 ±0.1
4.00
Ø1.50 +0.1/-0.0
Ao
±0.3
7.50±0.1
1.75±0.10
Ø1.50 Min.
12.00
User direction of feed
1
2
DR74
Supplied in tape and reel packaging,
1100 parts per reel, 13" diameter reel.
ACTUAL SIZE
DR74
Ao=7.90mm
Bo=7.90mm
Ko=4.70mm
DR74
###
wllyy R
1
2
A
A
SECTION A-A
DR125-###
wwllyy R
K0
+0.1/-0.0 1
min
4.0
2.0
16.00
1.7
11.5
+/-0.3
User direction of feed
B0
A0
DR125
Supplied in tape and reel packaging,
600 parts per reel,13" diameter reel
ACTUAL SIZE
DR125
Ao=13.0mm
Bo=13.0mm
Ko=6.30mm
1
2
A
A
DR127-###
wwllyy R
SECTION A-A
K0
+0.1/-0.0
min
4.0
2.0
20.00
1.7
11.5
+/-0.3
User direction of feed
B0
A0
DR127
Supplied in tape and reel packaging,
350 parts per reel, 13" diameter reel.
ACTUAL SIZE
DR127
Ao=13.0mm
Bo=13.0mm
Ko=8.30mm
Technical Data 4315
Effective September 2017
DR
High power density, high efficiency, shielded drum core power inductors
8www.eaton.com/electronics
Inductance characteristics
OCL vs I sat DR125
100
90
80
70
60
50
40
30
20
10
0
0 10 2200 30 40 50 60 70 80 90 100 110 120 130 140 150
% of Isat
OCL (%)
OCL vs I sat DR127
100
90
80
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
% Isat
OCL (%)
Core loss
OCL vs I sat DR73
100
90
80
70
60
50
40
30
20
10
0
0 20 40 60 80 100 120 140 160
% of Isat
OCL (%)
OCL vs I sat DR74
100
80
60
40
20
0
0 20 40 60 80 100 120 140 160 180
% of Isat
OCL (%)
Irms Derating with Core Loss
0
10
30
50
60
70
80
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
300 kHz
200 kHz
100 kHz
50 kHz
25 kHz
% of Losses from Irms (max)
Eaton
Electronics Division
1000 Eaton Boulevard
Cleveland, OH 44122
United States
www.eaton.com/electronics
© 2017 Eaton
All Rights Reserved Printed in USA
Publication No. 4315 BU-SB14112
September 2017
Eaton is a registered trademark.
All other trademarks are property
of their respective owners.
Life Support Policy: Eaton 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.
Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton also
reserves the right to change or update, without notice, any technical information contained in this bulletin.
Solder Reflow Profile
Temperature
t
tP
ts
TC -5°C
Time 25°C to Peak Time
25°C
Tsmin
Tsmax
TL
TP
Preheat
A
Max. Ramp Up Rate = 3°C/s
Max. Ramp Down Rate = 6°C/s
T
Ta
ab
bl
le
e
1
1
-
-
S
St
ta
an
nd
da
ar
rd
d
S
Sn
nP
Pb
b
S
So
ol
ld
de
er
r
(
(T
Tc
c)
)
VolumeVolume
Package mm3mm3
Thickness <350 _
>350
<2.5mm 235°C220°C
_
>2.5mm 220°C220°C
T
Ta
ab
bl
le
e
2
2
-
-
L
Le
ea
ad
d
(
(P
Pb
b)
)
F
Fr
re
ee
e
S
So
ol
ld
de
er
r
(
(T
Tc
c)
)
Volume Volume Volume
Package mm3mm3mm3
Thickness <350 350 - 2000 >2000
<1.6mm 260°C260°C260°C
1.6 – 2.5mm 260°C250°C245°C
>2.5mm 250°C245°C245°C
Reference JDEC J-STD-020
Standard SnPb Solder Lead (Pb) Free SolderProfile Feature
Preheat and Soak•eTmperature min. (Tsmin) 100°C150°C
• Temperature max. (Tsmax) 150°C200°C
• Time (Tsmin to Tsmax) (ts)60-120 Seconds60-120 Seconds
3°C/ Second Max. 3°C/ Second Max.
183°C217°C
60-150 Seconds60-150 Seconds
Table 1 able 2T
20 Seconds** 30 Seconds**
6°C/ Second Max. 6°C/ Second Max.
Average ramp up rate Tsmaxto Tp
Liquidous temperature (T
L
)
Time at liquidous (tL)
Peak package body temperature (TP)*
Time (tp)** within 5 °C of the specified classification temperature (Tc)
Average ramp-down rate (Tpto Tsmax)
Time 25°C to Peak Temperature Minutes Max.68 Minutes Max.
*Tolerance for peak profile temperature (Tp) is defined as a supplier minimum and a user maximum.
** Tolerance for time at peak profile temperature (tp) is defined as a supplier minimum and a user maximum.
Technical Data 4315
Effective September 2017
DR
High power density, high efficiency, shielded drum core power inductors
