Technical Data DS4311 Effective September 2017
Supersedes April 2014
Product features
•Dual winding inductors that can be used as
either a single inductor, or in coupled
inductor/transformer applications
(1:1 turns ratio)
•Four sizes of shielded drum core inductors
•Windings can be connected in series or
parallel, offering a broad range of inductance
and current ratings
•Peak current ratings from 0.13 A to 56 A
•RMS current ratings from 0.128 A to 17.9 A
•Inductance ratings from 0.33 µH to 4.02 mH
•200 Vac Isolation between windings
•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
DRQ
Dual winding, high power density, shielded drum core
power inductors
Pb
HALOGEN
HF
FREE
•Desktop and servers
•DVD and media players
•Portable and handheld devices
•LCD panels
•As a transformer: SEPIC, flyback
•As an inductor: buck, boost, coupled inductor
•DC-DC Converters
•VRM inductor for CPU and DDR power
supplies
•Input and output filter chokes
Environmental data
2
Technical Data DS4311
Effective September 2017
DRQ
Dual winding, high power density, 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
Parallel: (1,2 -4,3) Series: (1-4) tie (2-3)
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 approximately 30% roll-off at +20 °C
4. DCR limits @ +20 °C
5. Applied Volt-Time product (V-µs) across the inductor. This value represents
the applied V-µs at 100 kHz necessary to generate a core loss equal to 10%
of the total losses for a 40 °C temperature rise.
6. Turns Ratio (1:3):(2-4) 1:1
7. Part number definition: DRQxxx-yyy-
- DRQxxx = product code and size,
- yyy = inductance value in µH,
- R = decimal point. If no R is present, third character = # of zeros
- “-R” suffix = RoHS complian
Part Number
Rated
Inductance
(µH)
Parallel Ratings Series Ratings
OCL1
±20%
(µH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR Ω4
typ.
Volt5
µ-sec
OCL1
±20%
(µH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR Ω4
typ.
Volt5
µ-sec
DRQ73-R33-R 0.33 0.306 6.19 14.4 0.0074 1.98 1.224 3.10 7.18 0.0296 3.96
DRQ73-1R0-R 1.00 0.992 5.25 7.97 0.0103 3.56 3.968 2.63 3.99 0.0411 7.12
DRQ73-1R5-R 1.50 1.482 4.64 6.52 0.0132 4.36 5.928 2.32 3.26 0.0527 8.72
DRQ73-2R2-R 2.20 2.070 4.11 5.52 0.0167 5.15 8.280 2.06 2.76 0.0669 10.3
DRQ73-3R3-R 3.30 3.540 3.31 4.22 0.0259 6.73 14.16 1.66 2.11 0.1035 13.5
DRQ73-4R7-R 4.70 4.422 3.09 3.78 0.0297 7.52 17.69 1.55 1.89 0.1188 15.0
DRQ73-6R8-R 6.80 6.480 2.55 3.12 0.0435 9.11 25.92 1.28 1.56 0.1742 18.2
DRQ73-8R2-R 8.20 8.930 2.19 2.66 0.0592 10.7 35.72 1.10 1.33 0.2368 21.4
DRQ73-100-R 10.0 10.30 2.08 2.47 0.0656 11.5 41.20 1.04 1.24 0.2623 23.0
DRQ73-150-R 15.0 15.01 1.83 2.05 0.0844 13.9 60.04 0.916 1.03 0.339 27.8
DRQ73-220-R 22.0 22.65 1.62 1.67 0.107 17.0 90.60 0.811 0.83 0.429 34.0
DRQ73-330-R 33.0 34.41 1.31 1.35 0.166 21.0 137.6 0.653 0.68 0.665 42.0
DRQ73-470-R 47.0 48.62 1.08 1.14 0.241 24.9 194.5 0.542 0.57 0.965 49.8
DRQ73-680-R 68.0 68.91 0.89 0.96 0.358 29.7 275.6 0.444 0.48 1.43 59.4
DRQ73-820-R 82.0 80.37 0.86 0.89 0.384 32.1 321.5 0.430 0.44 1.54 64.2
DRQ73-101-R 100 101.4 0.73 0.79 0.527 36.0 405.6 0.367 0.39 2.11 72.0
DRQ73-151-R 150 150.9 0.58 0.65 0.851 44.0 603.6 0.289 0.32 3.41 88.0
DRQ73-221-R 220 223.3 0.52 0.53 1.05 53.5 893.2 0.260 0.27 4.20 107
DRQ73-331-R 330 325.5 0.42 0.44 1.59 64.5 1302 0.211 0.22 6.36 129
DRQ73-471-R 470 465.8 0.35 0.37 2.36 77.2 1863 0.173 0.18 9.44 154
DRQ73-681-R 680 676.5 0.29 0.31 3.47 93.1 2706 0.143 0.15 13.88 186
DRQ73-821-R 820 821.7 0.27 0.28 3.93 103 3287 0.134 0.14 15.72 206
DRQ73-102-R 1000 995.0 0.26 0.25 4.34 113 3980 0.128 0.13 17.36 226
Technical Data DS4311
Effective September 2017
DRQ
Dual winding, high power density, 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
Parallel: (1,2 -4,3) Series: (1-4) tie (2-3)
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 approximately 30% roll-off at +20 °C
4. DCR limits @ +20 °C
5. Applied Volt-Time product (V-µs) across the inductor. This value represents
the applied V-µs at 100 kHz necessary to generate a core loss equal to 10%
of the total losses for a 40 °C temperature rise.
6. Turns Ratio (1:3):(2-4) 1:1
7. Part number definition: DRQxxx-yyy-
- DRQxxx = product code and size,
- yyy = inductance value in µH,
- R = decimal point. If no R is present, third character = # of zeros
- “-R” suffix = RoHS complian
Part Number
Rated
Inductance
(µH)
Parallel Ratings Series Ratings
OCL1
±20%
(µH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR Ω4
Typ.
Volt5
µ-sec
OCL1
±20%
(µH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR Ω4
Typ.
Volt5
µ-sec
DRQ74-R33-R 0.33 0.294 6.20 18.4 0.0074 1.71 1.176 3.10 9.18 0.0295 3.42
DRQ74-1R0-R 1.00 0.952 5.33 10.2 0.0100 3.08 3.808 2.66 5.10 0.0400 6.16
DRQ74-1R5-R 1.50 1.422 4.96 8.35 0.0115 3.76 5.688 2.48 4.17 0.0461 7.52
DRQ74-2R2-R 2.20 1.986 4.66 7.06 0.0130 4.45 7.944 2.33 3.53 0.0521 8.9
DRQ74-3R3-R 3.30 3.396 3.94 5.40 0.0183 5.81 13.58 1.97 2.70 0.0732 11.6
DRQ74-4R7-R 4.70 5.182 3.34 4.37 0.0254 7.18 20.73 1.67 2.19 0.102 14.4
DRQ74-6R8-R 6.80 7.344 2.60 3.67 0.0418 8.55 29.38 1.30 1.84 0.167 17.1
DRQ74-8R2-R 8.20 8.566 2.53 3.40 0.0441 9.23 34.26 1.27 1.70 0.177 18.5
DRQ74-100-R 10.0 9.882 2.41 3.17 0.0489 9.92 39.53 1.20 1.58 0.196 19.8
DRQ74-150-R 15.0 16.09 2.11 2.48 0.0637 12.7 64.36 1.05 1.24 0.255 25.4
DRQ74-220-R 22.0 21.73 1.75 2.13 0.0925 14.7 86.92 0.874 1.07 0.371 29.4
DRQ74-330-R 33.0 33.01 1.41 1.73 0.143 18.1 132.0 0.702 0.87 0.574 36.2
DRQ74-470-R 47.0 49.64 1.15 1.41 0.216 22.2 198.6 0.573 0.71 0.865 44.4
DRQ74-680-R 68.0 69.67 1.03 1.19 0.265 26.3 278.7 0.517 0.60 1.06 52.6
DRQ74-820-R 82.0 80.95 0.91 1.11 0.345 28.4 323.8 0.453 0.55 1.38 56.8
DRQ74-101-R 100 101.6 0.86 0.99 0.383 31.8 406.4 0.430 0.49 1.53 63.6
DRQ74-151-R 150 150.0 0.69 0.81 0.591 38.6 600.0 0.346 0.41 2.37 77.2
DRQ74-221-R 220 227.0 0.56 0.66 0.907 47.5 908.0 0.279 0.33 3.63 95
DRQ74-331-R 330 335.6 0.45 0.54 1.41 57.8 1342 0.224 0.27 5.66 116
DRQ74-471-R 470 465.3 0.40 0.46 1.74 68.1 1861 0.202 0.23 6.97 136
DRQ74-681-R 680 671.2 0.33 0.38 2.58 81.7 2685 0.166 0.19 10.3 163
DRQ74-821-R 820 812.7 0.31 0.35 2.93 89.9 3251 0.156 0.17 11.7 180
DRQ74-102-R 1000 1009 0.27 0.31 3.89 100 4036 0.135 0.16 15.6 200
Technical Data DS4311
Effective September 2017
DRQ
Dual winding, high power density, shielded drum core power inductors
4www.eaton.com/electronics
Product specifications
1. Open Circuit Inductance Test Parameters: 100 kHz, 0.25 Vrms, 0.0 Adc
Parallel: (1,2 -4,3) Series: (1-4) tie (2-3)
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 approximately 30% roll-off at +20 °C
4. DCR limits @ +20 °C
5. Applied Volt-Time product (V-µs) across the inductor. This value represents
the applied V-µs at 100 kHz necessary to generate a core loss equal to 10%
of the total losses for a 40 °C temperature rise.
6. Turns Ratio (1:3):(2-4) 1:1
7. Part number definition: DRQxxx-yyy-
- DRQxxx = product code and size,
- yyy = inductance value in µH,
- R = decimal point. If no R is present, third character = # of zeros
- “-R” suffix = RoHS complian
Part Number
Rated
Inductance
(µH)
Parallel Ratings Series Ratings
OCL1
±20%
(µH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR Ω4
typ.
Volt5
µ-sec
OCL1
±20%
(µH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR Ω4
typ.
Volt5
µ-sec
DRQ125-R47-R 0.47 0.456 17.6 33.0 0.0018 3.17 1.824 8.80 16.5 0.0078 6.34
DRQ125-1R0-R 1.00 0.894 15.0 23.6 0.0024 4.43 3.576 7.51 11.8 0.0096 8.86
DRQ125-1R5-R 1.50 1.478 13.8 18.3 0.0029 5.70 5.912 6.89 9.15 0.0114 11.40
DRQ125-2R2-R 2.20 2.208 10.9 15.0 0.0045 6.97 8.832 5.46 7.50 0.0182 13.9
DRQ125-3R3-R 3.30 3.084 9.26 12.7 0.0063 8.23 12.34 4.63 6.35 0.0253 16.5
DRQ125-4R7-R 4.70 5.274 7.18 9.71 0.0105 10.8 21.10 3.59 4.86 0.0420 21.6
DRQ125-6R8-R 6.80 6.588 6.64 8.68 0.0123 12.0 26.35 3.32 4.34 0.0492 24.0
DRQ125-8R2-R 8.20 8.048 5.54 7.86 0.0176 13.3 32.19 2.77 3.93 0.0705 26.6
DRQ125-100-R 10.0 9.654 5.35 7.17 0.0189 14.6 38.62 2.67 3.59 0.0757 29.2
DRQ125-150-R 15.0 15.35 4.27 5.69 0.0298 18.4 61.40 2.13 2.85 0.120 36.8
DRQ125-220-R 22.0 22.36 3.70 4.71 0.0396 22.2 89.44 1.84 2.36 0.159 44.4
DRQ125-330-R 33.0 33.74 3.28 3.84 0.0505 27.2 135.0 1.64 1.92 0.203 54.4
DRQ125-470-R 47.0 47.47 2.71 3.24 0.0740 32.3 189.9 1.35 1.62 0.297 64.6
DRQ125-680-R 68.0 67.91 2.22 2.70 0.101 38.6 271.6 1.11 1.35 0.440 77.2
DRQ125-820-R 82.0 86.89 2.05 2.39 0.128 43.7 347.6 1.03 1.20 0.515 87.4
DRQ125-101-R 100 102.7 1.78 2.20 0.170 47.5 410.8 0.892 1.10 0.682 95.0
DRQ125-151-R 150 151.1 1.48 1.81 0.248 57.6 604.4 0.739 0.905 0.991 115.2
DRQ125-221-R 220 216.8 1.19 1.51 0.384 69.0 867.2 0.594 0.755 1.54 138
DRQ125-331-R 330 332.6 1.06 1.22 0.482 85.5 1330 0.530 0.610 1.93 171
DRQ125-471-R 470 473.1 0.87 1.02 0.718 102 1892 0.434 0.510 2.87 204
DRQ125-681-R 680 679.8 0.70 0.85 1.10 122 2719 0.350 0.425 4.42 244
DRQ125-821-R 820 828.0 0.60 0.77 1.49 135 3312 0.301 0.385 5.96 270
DRQ125-102-R 1000 1008 0.57 0.70 1.69 149 4032 0.283 0.350 6.76 298
Technical Data DS4311
Effective September 2017
DRQ
Dual winding, high power density, shielded drum core power inductors
5
www.eaton.com/electronics
Product specifications
1. Open Circuit Inductance Test Parameters: 100 kHz, 0.25 Vrms, 0.0 Adc
Parallel: (1,2 -4,3) Series: (1-4) tie (2-3)
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 approximately 30% roll-off at 20°C
4. DCR limits @ +20 °C
5. Applied Volt-Time product (V-µs) across the inductor. This value represents
the applied V-µs at 100 kHz necessary to generate a core loss equal to 10%
of the total losses for a 40 °C temperature rise.
6. Turns Ratio (1:3):(2-4) 1:1
7. Part number definition: DRQxxx-yyy-
- DRQxxx = product code and size,
- yyy = inductance value in µH,
- R = decimal point. If no R is present, third character = # of zeros
- “-R” suffix = RoHS complian
Part Number
Rated
Inductance
(µH)
Parallel Ratings Series Ratings
OCL1
±20%
(µH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR Ω4
typ.
Volt5
µ-sec
OCL1
±20%
(µH)
Irms
2
(A)
Isat
3
(A)
Peak
DCR Ω4
typ.
Volt5
µ-sec
DRQ127-R47-R 0.47 0.419 17.9 56.0 0.00195 3.50 1.676 8.94 28 0.0078 7.00
DRQ127-1R0-R 1.00 0.821 15.5 40.0 0.00261 4.90 3.284 7.74 20 0.0104 9.80
DRQ127-1R5-R 1.50 1.357 13.5 31.1 0.00341 6.30 5.428 6.77 15.6 0.0137 12.60
DRQ127-2R2-R 2.20 2.027 12.5 25.5 0.00373 7.70 8.108 6.23 12.7 0.0161 15.4
DRQ127-3R3-R 3.30 2.831 10.4 21.5 0.00567 9.10 11.32 5.23 10.8 0.0229 18.2
DRQ127-4R7-R 4.70 4.841 8.25 16.5 0.00917 11.9 19.36 4.13 8.24 0.0367 23.8
DRQ127-6R8-R 6.80 7.387 7.34 13.3 0.0116 14.7 29.55 3.67 6.67 0.0465 29.4
DRQ127-8R2-R 8.20 8.861 6.32 12.2 0.0157 16.1 35.44 3.16 6.09 0.0627 32.2
DRQ127-100-R 10.0 10.47 6.04 11.2 0.0172 17.5 41.88 3.02 5.60 0.0686 35.0
DRQ127-150-R 15.0 14.09 5.03 9.66 0.0247 20.3 56.36 2.51 4.83 0.0990 40.6
DRQ127-220-R 22.0 22.93 4.00 7.57 0.0391 25.9 91.72 2.00 3.78 0.157 51.8
DRQ127-330-R 33.0 33.92 3.23 6.22 0.0600 31.5 135.7 1.61 3.11 0.241 63.0
DRQ127-470-R 47.0 47.05 2.95 5.28 0.0719 37.1 188.2 1.47 2.64 0.288 74.2
DRQ127-680-R 68.0 66.48 2.44 4.44 0.105 44.1 265.9 1.22 2.22 0.421 88.2
DRQ127-820-R 82.0 79.75 2.09 4.06 0.143 48.3 319.0 1.04 2.03 0.573 96.6
DRQ127-101-R 100 99.31 1.96 3.64 0.163 53.9 397.2 0.980 1.82 0.653 107.8
DRQ127-151-R 150 144.9 1.59 3.01 0.247 65.1 579.6 0.796 1.51 0.989 130.2
DRQ127-221-R 220 221.5 1.29 2.43 0.376 80.5 886.0 0.645 1.22 1.50 161
DRQ127-331-R 330 323.6 1.04 2.01 0.574 97.3 1294 0.522 1.01 2.30 195
DRQ127-471-R 470 467.1 0.85 1.68 0.861 117 1868 0.427 0.838 3.44 234
DRQ127-681-R 680 676.7 0.76 1.39 1.08 141 2707 0.380 0.697 4.32 282
DRQ127-821-R 820 818.1 0.65 1.27 1.47 155 3272 0.325 0.633 5.88 310
DRQ127-102-R 1000 1005 0.61 1.14 1.66 172 4020 0.307 0.571 6.64 344
DRQ
Dual winding, high power density, shielded drum core power inductors
6www.eaton.com/electronics
Technical Data DS4311
Effective September 2017
Dimensions - mm
Bottom View
0.60
6.1
0.73
0.80
7.6
Max.
Side View
Top View
DRQ73
###
wllyy R
•
7.97.9
Series ModeDual Inductor Mode
1.73
Recommended Pad Layout
0.40
1.73
.0011.00
0.40
Series ModeDual Inductor
L2
3
L1
1
4
2
L1
3
1
Schematic
L2
4
2
3
1
L2L1
4
Parallel Mode
2
3.55 Max
7.6
Max.
Bottom View
0.60
6.1
0.73
7.6
Max
Side View
Top View
7.97.9
Series ModeDual Inductor Mode
1.73
Recommended Pad Layout
0.40
1.73
1.001.00 0.40
Series ModeDual Inductor
L2
3
L1
1
4
2
L1
3
1
Schematic
L2
4
2
3
1
4
Parallel Mode
L1 L2
2
7.6
Max
4.45
Max
### = Inductance value per family chart
wllyy = Date code
R = Revision level
Dot indicates pin #1
Do not route traces or vias underneath the inductor
•
DRQ74
###
wllyy R
DRQ74
DRQ73
Technical Data DS4311
Effective September 2017
DRQ
Dual winding, high power density, shielded drum core power inductors
7
www.eaton.com/electronics
2.50
2.05
12.5
Max
10.0
2.00
1
2
4
3
12.5
Max
Bottom View
Side View
To p View 6.00 Max
1
2
DRQ125
###
wwllyy R
4
3
•
Dual Inductor Mode Series Mode
3.85
13.80
Recommended Pad Layout
13.80
1
0.50
2
3.85
1
4
2.50
32
0.50
4
3
Schematic
Series Mode
L1L1 L2
343
Dual Inductor
121
L2L1
L2
443
Parallel Mode
21 2
2.50
2.05
10.0
Bottom View
2.00
1
212.5
Max
4
3
1
2
DRQ127
###
wwllyy R
4
3
•
Dual Inductor Mode Series Mode
3.85
13.80
Recommended Pad Layout
13.80
0.50
3.85
1
2.50 2
0.50
4
3
12.5
Max
8.0
Max
Side View
To p View
Schematic
43
Dual Inductor
1
L1
2
L2
3
Series Mode
L1
1
L2 L2
Parallel Mode
43
12
L1
2
4
### = Inductance value per family chart
wwllyy = (date code)
R = revision level
Dot indicates pin #1
Do not route traces or vias underneath the inductor
DRQ127
Dimensions - mm
DRQ125
Technical Data DS4311
Effective September 2017
DRQ
Dual winding, high power density, shielded drum core power inductors
8www.eaton.com/electronics
Di rection of Feed
ACTUAL SIZE
DR Q73
SECTION A-A
A
A
DRQ74
###
Ko
BBo
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.
12.000
2
1
3
4
Direction of Feed
DRQ73
Supplied in tape and reel packaging,
1350 parts per reel, 13" diameter reel.
Ao=7.90mm
Bo=7.90mm
Ko=3.80mm
DRQ74
Supplied in tape and reel packaging,
1100 parts per reel, 13" diameter reel.
Ao=7.90mm
Bo=7.90mm
Ko=4.70mm
ACTUAL SIZE
DRQ74
1
2
4
3
A
A
DRQ125
###
wwllyy
•
SECTION A-A
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
BB0
A0
DRQ125
Supplied in tape and reel packaging,
600 parts per reel, 13" diameter reel.
Direction of Feed
Ao=13.00mm
Bo=13.00mm
Ko=6.30mm
ACTUAL SIZE
DRQ125
1
2
4
3
A
A
DRQ127
###
wwllyy
SECTION A-A
R0.3 max.
R0.5 TYP.
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
BB0
A0
DRQ127
Supplied in tape and reel packaging,
350 parts per reel, 13" diameter reel.
Dimensions are in millimeters.
Direction of Feed
Ao=13.00mm
Bo=13.00mm
Ko=8.30mm
ACTUAL SIZE
DRQ127
Packaging information- mm
Technical Data DS4311
Effective September 2017
DRQ
Dual winding, high power density, shielded drum core power inductors
9
www.eaton.com/electronics
Core loss
Inductance characteristics
300 KHz
50 KHz
200 KHz
100 KHz
25 KHz
I
rms
Derating with Core Loss
% of Applied Volt-µsecond
% of Losses from I
rms
(max)
100
90
80
70
60
50
40
30
20
10
0
0 20 40 60 80 100 120 140 160
% of Isat
OCL (%)
DRQ74
100
80
60
40
20
0
0 20 40 60 80 100 120 140 160 180
% of Isat
OCL (%)
DRQ73
DRQ127
100
90
80
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100110120130 140 150
% of Isat
OCL (%)
DRQ125
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
% of Isat
OCL (%)
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. DS4311 BU-SB14113
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 Compan . 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 inju y 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 DS4311
Effective September 2017
DRQ
Dual winding, high power density, shielded drum core power inductors
