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| 型号： | DRA74-821-R |
| 厂商： | Cooper Bussmann |
| 文件页数： | 3/8页 |
| 文件大小： | 0K |
| 描述： | INDUCTOR HI TEMP 820UH .279A SMD |
| 标准包装： | 1 |
| 系列： | DRA |
| 电感： | 820µH |
| 电流： | 279mA |
| 电流 - 饱和： | 327mA |
| 类型： | 鼓型芯 |
| 容差： | ±20% |
| 屏蔽： | 屏蔽 |
| DC 电阻(DCR)： | 3.63 欧姆 |
| 封装/外壳： | 0.299" L x 0.299" W x 0.171" H（7.60mm x 7.60mm x 4.35mm） |
| 安装类型： | 表面贴装 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 165°C |
| 频率 - 测试： | 100kHz |
| 其它名称： | 283-3643-6 |
DRA Series
Magnetics Solutions
For Automotive Applications
High Power Density,
High Efficiency, Shielded Inductors
Part Number
Rated
Inductance
OCL (1)
μH
Irms (2)
Amperes
Isat (3)
Amperes
Isat (4)
Amperes
DCR (5)
( ? )
K-factor (6)
+/-20%
Typ.
DRA125-150-R
DRA125-220-R
DRA125-330-R
DRA125-470-R
DRA125-680-R
DRA125-820-R
DRA125-101-R
DRA125-151-R
DRA125-221-R
DRA125-331-R
DRA125-471-R
DRA125-681-R
DRA125-821-R
DRA125-102-R
DRA127-R47-R
DRA127-1R0-R
DRA127-1R5-R
DRA127-2R2-R
DRA127-3R3-R
DRA127-4R7-R
DRA127-6R8-R
DRA127-8R2-R
DRA127-100-R
DRA127-150-R
DRA127-220-R
DRA127-330-R
DRA127-470-R
DRA127-680-R
DRA127-820-R
DRA127-101-R
DRA127-151-R
DRA127-221-R
DRA127-331-R
DRA127-471-R
DRA127-681-R
DRA127-821-R
DRA127-102-R
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
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
14.67
20.65
31.47
47.83
68.48
80.86
97.6
150.0
222.8
325.1
466.3
683.3
813.6
992.8
0.413
0.772
1.27
1.92
3.51
4.58
6.72
8.33
9.63
14.90
21.47
32.01
47.91
68.22
83.91
100.8
151.2
219.8
328.3
474.5
676.6
824.6
998.7
4.45
3.95
3.19
2.59
2.125
2.005
1.745
1.409
1.142
0.998
0.826
0.673
0.632
0.552
22.50
19.22
15.32
12.52
9.59
8.14
7.32
6.33
6.02
4.83
3.98
3.22
2.62
2.333
2.008
1.888
1.524
1.253
1.011
0.827
0.736
0.637
0.598
5.72
4.74
3.86
3.13
2.635
2.406
2.213
1.785
1.469
1.194
1.006
0.834
0.758
0.695
56.0
40.0
31.1
25.5
18.7
16.5
13.3
12.2
11.2
9.03
7.57
6.22
5.09
4.18
3.84
3.46
2.83
2.35
1.93
1.62
1.33
1.22
1.10
4.58
3.79
3.09
2.506
2.108
1.925
1.771
1.428
1.175
0.955
0.805
0.667
0.606
0.556
44.8
32.0
24.9
20.4
14.93
13.18
10.67
9.74
8.96
7.23
6.05
4.98
4.07
3.34
3.07
2.77
2.26
1.88
1.54
1.29
1.06
0.978
0.878
0.027
0.035
0.053
0.081
0.120
0.135
0.178
0.273
0.416
0.543
0.79
1.20
1.36
1.78
0.0012
0.0017
0.0027
0.0040
0.0068
0.0094
0.012
0.016
0.017
0.027
0.040
0.060
0.091
0.115
0.155
0.175
0.269
0.398
0.612
0.91
1.15
1.54
1.75
2.9
2.4
1.9
1.6
1.3
1.2
1.1
0.9
0.7
0.6
0.5
0.4
0.4
0.4
14.3
10.2
7.9
6.5
4.8
4.2
3.4
3.1
2.9
2.3
1.9
1.6
1.3
1.1
1.0
0.9
0.7
0.6
0.5
0.4
0.3
0.3
0.3
(1) Open Circuit Inductance test parameters: 100kHz, 0.25V, 0.0Adc,
tolerance is ±20%
(2) Irms: DC current for an approximate ? T of 40°C without core loss. Derating is
necessary for AC currents. PCB layout, trace thickness and width, air-flow, and
proximity of other heat generating components will affect the temperature rise. It
is recommended that the temperature of the part not exceed 165°C under worst
case operating conditions verified in the end application.
(3) Isat Amperes peak for approximately 30% rolloff (@25°C)
(4) Isat Amperes peak for approximately 40% rolloff (@125°C)
Mechanical Diagrams
DRA73 Series
(5) DCR limits @ 25°C
(6) K-factor: Used to determine B p-p for core loss (see graph).
B p-p = K*L* ? I, B p-p(mT), K: (K factor from table), L: (Inductance in μH),
? I (Peak to peak ripple current in Amps).
(7) Part Number Definition: DRAxxx-xxx-R
DRAxxx = Product code and size; -xxx = Inductance value in uH;
R = decimal point; If no R is present, third character = # of zeros.
-R suffix = RoHS compliant
BOTTOM VIEW
FRONT VIEW
7.6 Max
TOP VIEW
RECOMMENDED PCB LAYOU T
2.50
SCHEMATIC
1
2.00
7.6 Max
2
###
wwllyy R
1
3.25
2
Dimensions in Millimeters.
1.5
3.55
Max
8.50
### = Inductance value in uH. R = decimal point.
If no R is present third character = # of zeros
wwllyy = (date code) R = revision level
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