Fusible resistors
FEATURES
•
Overload protection without
risk of fire
•
wide range of overload currents.
PNFR25/25H/1W/2W
APPLICATIONS
•
TV, Monitor, Audio, Video
DESCRIPTION
A homogeneous film of metal alloy
is Deposited on a high grade ceramic
body. After a laser groove has been
cut in the resistive layer, tined
connecting leads of electrolytic
copper are welded to the end-caps
PNFR25
PNFR25H
PNFR 1W
PNFR 2W
TYPE
D
Max.
2.5
2.5
3.9
3.9
Dimensions ( mm )
L1
L2
d
max.
max.
(± 0.05)
6.5
6.5
10
10
7.5
7.5
12
12
0.55
0.55
0.8
0.8
QUICK REFERENCE DATA
DESCRITION
resistance range
resistance tolerance
temperature coefficient :
R
≤
4.7Ω
R > 4.7Ω
VALUE
PNFR25
PNFR25H
PNFR 1W
PNFR 2W
0.2Ω to 15
㏀
0.1Ω to 10
㏀
±10%, ±5%, ±2%
( E24)
±1%,
( E48, E96 series )
±
250 ppm /
℃
±
200 ppm /
℃
±
250 ppm /
℃
±
200 ppm /
℃
±
250 ppm /
℃
±
200 ppm /
℃
±
250 ppm /
℃
±
200 ppm /
℃
rated dissipation
at T
amb
= 70
℃
max. working voltage
max. overload voltage
noise :
basic specifications
climatic category (IEC60)
stability,
∆R/R
max. after
load : 1000 hours
climatic tests :
soldering
short time overload
fusing characteristic
0.33 W
250 V
400 V
0.5 W
350 V
500 V
1W
350 V
500 V
2W
500 V
700 V
max. 1.5
㎶
/V
IEC 60 115-1 and 60 115-2
55 / 155 / 56
±
1%
+0.05Ω
±
1%
+0.05Ω
±
0.25%
+0.05Ω
±
1%
+0.05Ω
±
1%
+0.05Ω
±
0.25%
+0.05Ω
±
5%
+0.1Ω
±
3%
+0.1Ω
±
1%
+0.05Ω
±
5%
+0.1Ω
±
3%
+0.1Ω
±
1%
+0.05Ω
±
0.25%
+0.05Ω
±
1%
+0.05Ω
R < 1Ω : rated power 25 times ( 30sec. Max.)
R > 1Ω : rated power 15 times ( 30sec. Max.)
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