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參數(shù)資料
| 型號： | EMC |
| 廠商： | TT Electronics / Welwyn |
| 英文描述： | Pulse Withstanding Fusible Flameproof Metal Film Resistors |
| 中文描述： | 隔爆型脈沖耐熔金屬膜電阻 |
| 文件頁數(shù)： | 2/3頁 |
| 文件大?。?/td> | 68K |
| 代理商： | EMC |
Flammability
The resistor coating is UL94-V0 rated and will not burn or emit incandescent particles under any condition of applied
temperature or power overload.
Marking
EMC resistors are colour coded with five bands. Four of the bands indicate value and tolerance in accordance with
IEC62. Parts with 20% tolerance have no fourth band. A fifth yellow band denotes constant voltage fusibility.
Performance Data
Load at Rated Power: 1000hrs @ 70
°
C
R%
Shelf life: 12 months at room temperature
R%
Derating from rated power at 70
°
C
Climatic
R%
Climatic Category
Temperature rapid change
R%
Resistance to solder heat
R%
Pulse Performance
Fusing Performance
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own test data and is considered accurate at time of print.
ó
Welwyn Components Limited
Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com
Maximum
5
2
Zero at 155
°
C
3
50/155/56
0.5
0.5
Single Rectangular Pulse
1
10
100
1000
10000
0.01
0.1
1
10
100
1000
10000
Pulse Duration (ms)
P
A subsidiary of TT electronics plc
IEC61000-4-5 1.2/50
m
s Pulse
0
100
200
300
400
500
600
700
0
10
20
30
40
50
60
70
Value (Ohms)
P
EMC resistors fuse open circuit at overload powers
exceeding 40W within the time indicated on the
Fusing Characteristic. Their fusing performance at
lower overload powers is not specified.
EMC resistors fuse safely in the event of a 115Vrms /
240Vrms overload (line / mains short circuit
condition) without burning or emitting incandescent
particles.
After fusing, the resistance is at least 100 times
greater than the original nominal value.
Fusing Characteristic
(Constant Voltage)
0
10
20
30
40
50
60
0
20
40
60
80
100
Initial Power (W)
M
(4R7-8R2)
(10R-68R)
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