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參數(shù)資料
| 型號(hào)： | CR |
| 廠商： | TT Electronics / Welwyn |
| 英文描述： | Surface Mounted Resistors |
| 中文描述： | 表面貼裝電阻 |
| 文件頁(yè)數(shù)： | 2/3頁(yè) |
| 文件大小： | 169K |
| 代理商： | CR |
Dimensions of Standard Styles (mm) & Weight (g)
Wrap around
Style
L
W
T max
A
B
C
Wt
0503
1.25±0.2 0.63±.15
0.5
Not available
0.20±0.1
0.005
0805
2.0±0.2
1.25±0.15
0.6
0.3±0.15
0.9 min
0.3±0.1
0.009
1005
2.5±0.3 1.25±0.2
0.7
Not available
0.4±0.15
0.015
1206
3.2±0.2
1.6±0.2
0.7
0.4±0.2
1.7 min
0.4±0.15
0.020
2010
5.1±0.3
2.5±0.2
0.7
0.6±0.3
3.0 min
N/A
0.036
2512
6.5±0.3
3.2±0.2
0.7
0.6±0.3
4.4 min
N/A
0.055
Surface Mounted
Resistors
CR Series
Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
CECC 40401-008 CECC40401-004 CECC40401-003
Actual
Requirements
Requirements
Requirements
≤
3M3 2
>3M3 3
Maximum
Typical
Load at rated power: 1000 hours at 70°C
R%
2
2
2
0.25
Shelf life: 12 months at room temp.
R%
-
-
-
0.1
0.02
Derating from rated power at 70°C
Zero at 155°C
Zero at 125°C
Zero at 125°C
Overload
R%
R%
0805:1 1206:0.5
0.5
2
1
0.1
Dry Heat: 1000 hours at UCT
2
1
≤
3M3 2
>3M3 3
to 10M 1
0.2
(125°C for 003 & 004 - 155°C for 008)
>10M 2
>10M 1
Long term damp heat
R%
R%
R%
volts
2
2
2
1
0.25
Temperature rapid change
0.5
0.5
1
0.25
0.05
Resistance to solder heat
0.5
0.5
2
0.25
0.05
Voltage proof
0805 : 200 1206 : 300
0503 : 100
2010 : 400 2512 : 500
All others : 500
Physical Data
This dimension determines the number of conductors which may pass under the surface mounted device.
Issue F · 10.05
Welwyn Components
18
Performance Data
Value Ranges (ohms)
T
W
A
A
B
L
Wrap-around terminations
(3 faces)
T
W
L
Planar terminations
C
C
Construction
Thick film resistor material, overglaze and organic protection
are screen printed on a 96% alumina substrate.
Terminations
Planar (or single-sided) termination is gold and suitable for
wire-bonding; wrap-around is suitable for soldering.
Solderability
Wrap-around terminations have an electroplated nickel barrier
and solder coating, this ensures excellent ‘leach’ resistance
properties and solderability. They will withstand immersion in
solder at 260°C for 30 seconds.
Marking
All relevant information recorded on the primary package or reel.
Tolerance
%
Size
5
2
1
0.5
0.25
0.1
0503
1 to 10M
1 to 10M
10 to 10M
100 to 1M
N/A
N/A
0805
1 to 100M
1 to 50M
1 to 20M
10 to 10M
100 to 1M
100 to 1M
1005
1 to 100M
1 to 50M
1 to 20M
10 to 10M
100 to 1M
100 to 1M
1206
1 to 100M
1 to 50M
1 to 25M
10 to 10M
100 to 1M
100 to 1M
2010
1 to 1M
1 to 1M
1 to 1M
10 to 10M
100 to 1M
N/A
2512
1 to 1M
1 to 1M
1 to 1M
10 to 10M
100 to 1M
N/A
Alternative styles for
surface mounting resistors
Note: An 0.01 ohm addition to be added to the performance of all resistors <10 ohms
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