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参数资料
| 型号： | SRR7045-821M |
| 厂商： | Bourns Inc. |
| 文件页数： | 1/2页 |
| 文件大小： | 0K |
| 描述： | INDUCTOR 820UH 250MA SMD |
| 标准包装： | 1,000 |
| 系列： | SRR7045 |
| 电感： | 820µH |
| 电流： | 250mA |
| 电流 - 饱和： | 175mA |
| 类型： | 铁氧体芯体 |
| 容差： | ±20% |
| 屏蔽： | 屏蔽 |
| DC 电阻(DCR)： | 最大 2.2 欧姆 |
| Q因子@频率： | 26 @ 796kHz |
| 频率 - 自谐振： | 3MHz |
| 材料 - 芯体： | 铁氧体 |
| 封装/外壳： | 0.276" L x 0.276" W x 0.177" H（7.00mm x 7.00mm x 4.50mm） |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
| 频率 - 测试： | 100kHz |
Features
■ Available in E6 values
■ Current rating to 3.50 amps
Applications
■ Input/output of DC/DC converters
■ Power supplies for:
47
0
■ RoHS compliant*
?
?
Portable communication equipment
Camcorders
?
?
LCD TVs
Car radios
SRR7045 Series - Shielded SMD Power Inductors
Electrical Speci?cations
General Speci?cations
Bourns Part No.
SRR7045-1R0M
SRR7045-2R2M
SRR7045-2R7M
SRR7045-3R3M
SRR7045-3R9M
Inductance 1 KHz
uH Tol. %
1.0 ±20
2.2 ±20
2.7 ±20
3.3 ±20
3.9 ±20
Q
Typ.
10
10
10
10
10
Test
Frequency
(MHz)
7.96
7.96
7.96
7.96
7.96
SRF
Typ.
(MHz)
60
60
60
43
40
RDC
Max.
( Ω )
0.020
0.022
0.027
0.027
0.028
I rms
Max.
(A)
3.50
2.80
2.78
2.50
2.71
I sat
Typ.
(A)
3.20
2.50
3.10
2.20
2.43
Test Voltage ....................................0.5 V
Re?ow Soldering .. 230 °C, 50 sec. max.
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Soldering Heat
............................... 260 °C for 10 sec.
SRR7045-4R7M
4.7
±20
10
7.96
35
0.030
2.64
2.20
SRR7045-5R6M
SRR7045-6R3M
SRR7045-6R8M
SRR7045-100M
SRR7045-120M
SRR7045-150M
SRR7045-180M
SRR7045-220M
SRR7045-270M
SRR7045-330M
SRR7045-390M
SRR7045-470M
SRR7045-560M
SRR7045-680M
SRR7045-820M
SRR7045-101M
SRR7045-121M
SRR7045-151M
SRR7045-181M
5.6
6.3
6.8
10
12
15
18
22
27
33
39
47
56
68
82
100
120
150
180
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
10
10
10
30
27
31
29
26
25
25
26
29
21
22
22
40
30
51
52
7.96
7.96
7.96
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
0.796
0.796
0.796
0.796
33
30
28
25
23
24
21
21
18
12
13
11
11
10
9
8
7
7
5
0.036
0.038
0.036
0.042
0.050
0.062
0.070
0.070
0.110
0.115
0.130
0.150
0.200
0.210
0.280
0.300
0.420
0.480
0.660
2.38
2.33
2.20
2.00
1.85
1.60
1.50
1.50
1.25
1.15
1.10
0.95
0.85
0.77
0.70
0.65
0.60
0.53
0.475
2.00
1.85
2.00
1.70
1.40
1.35
1.15
1.15
1.00
0.90
0.80
0.78
0.65
0.60
0.60
0.50
0.45
0.41
0.375
Materials
Core ............................... Ferrite DR & RI
Wire ............. Enameled copper wire 130
Terminal ....................................Cu/Ni/Sn
Rated Current
...............Ind. drop of 10 % typ. at Isat
(-1R0M through -221M)
...............Ind. drop of 25 % typ. at Isat
(-271M through -102M)
Temperature Rise
.....................30 °C max. at rated Irms
Packaging .................. 1000 pcs. per reel
Product Dimensions
7.0 ± 0.3
(.276 ± .012)
SRR7045-221M
SRR7045-271M
SRR7045-331M
SRR7045-391M
SRR7045-471M
SRR7045-561M
SRR7045-681M
SRR7045-821M
SRR7045-102M
220
270
330
390
470
560
680
820
1000
±20
±20
±20
±20
±20
±20
±20
±20
±20
44
30
65
27
80
27
65
26
90
0.796
0.796
0.796
0.796
0.796
0.796
0.796
0.796
0.252
5
5
4
5
3
4
3
3
3
0.700
0.840
0.730
1.200
1.100
1.600
1.600
2.200
2.400
0.45
0.40
0.40
0.35
0.32
0.30
0.27
0.25
0.25
0.36
0.275
0.25
0.225
0.22
0.20
0.20
0.175
0.15
220
7.0 ± 0.3
(.276 ± .012)
4.50 ± 0.3
(.177 ± .012)
Schematic
Recommended Layout
TYP.
2.0
(.079)
1.5
REF.
2.4
(.094)
1.8
(.071)
REF.
(.059)
TYP.
4.0
(.157)
TYP.
4.2
(.165)
REF.
7.80
(.307)
REF.
1.8
(.071)
REF.
DIMENSIONS:
MM
(INCHES)
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Speci?cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their speci?c applications.
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