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| 型號： | NFR25 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Fusible, Non-Flammable Resistors |
| 中文描述： | 易熔，不易燃電阻 |
| 文件頁數(shù)： | 8/8頁 |
| 文件大?。?/td> | 96K |
| 代理商： | NFR25 |
Document Number: 28737
Revision: 24-Feb-04
For technical questions contact: ff3dresistors@vishay.com
www.vishay.com
8
NFR25/25H
Fusible, Non-Flammable Resistors
Vishay BCcomponents
4.24.2
3 (Ca)
damp heat
(steady state) (IEC)
56 days; 40
°
C; 90 to 95% RH; loaded
with 0.01 P
(IEC steps: 4 to 100 V)
1000 hours;
loaded with P
n
or V
max
;
1.5 hours on and 0.5 hours off
1000 hours;
no load
at 20/LCT/20
°
C and
20/UCT/20
°
C (TC
×
10
6
/K):
0.22
≤
R
≤
4.7
R
ins
max.: 1000 M
R/R max.:
±
1 % + 0.05
4.25.1
endurance (at 70
°
C)
R/R max.:
±
1 % + 0.05
4.25.3
endurance at upper
category temperature
temperature coefficient
R/R max.:
±
1 % + 0.05
4.8.4.2
≤
±
200
×
10
6
/K
≤
±
200
×
10
6
/K
≤
±
100
×
10
6
/K
≤
±
200
×
10
6
/K
≤
±
100
×
10
6
/K
≤
±
100
×
10
6
/K
4.7
<
R
≤
15
15
<
R
≤
15 k
4.12
noise
“IEC publication 60195”
< 0.1
μ
V/V
4.26
accidental overload
cheese-cloth
nonflammable
OTHER TESTS IN ACCORDANCE WITH IEC 60115 CLAUSES AND IEC 60068 TEST METHOD
4.17
20 (Ta)
solderability
(after ageing)
8 hours steam or 16 hours 155
°
C;
leads immersed 6 mm for 2
±
0.5 s in a
solder bath at 235
±
5
°
C
good tinning (
≥
95 % covered);
no damage
4.6.1.1
insulation resistance
maximum voltage 500 V (DC) after
1 minute; metal block method
R
ins
min.: 10
4
M
see 2
nd
amendment
to
“IEC 60115-1”
, Jan.’87
pulse load
see the Pulse Loading Capabilities
graphs
TEST PROCEDURES AND REQUIREMENTS
IEC
60068-2
TEST
METHOD
IEC 60115-1
CLAUSE
TEST
PROCEDURE
REQUIREMENTS
NFR25
NFR25H
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