Carbon composition resistors
FEATURES
•
Non inductive
•
High pulse loading capability.
SR25/37/52
APPLICATIONS
•
Application for overload and high
voltage surge hazard circuits .
DESCRIPTION
A carbon film is deposited on a high
grade ceramic body. After that caps
are applied to the rods and copper
wire are welded to these end caps.
The resistors are coated with a brown
and blue non flammable lacquer witch
provides electrical, mechanical and
climatic protection.
SR25
SR37
SR52
TYPE
D
Max.
2.7
3.7
6.0
Dimensions ( mm )
L1
L2
d
max.
max.
(± 0.05)
6.5
9.5
16.5
7.5
12
18.5
0.6
0.7
0.8
QUICK REFERENCE DATA
DESCRITION
resistance range
resistance tolerance
temperature coefficient :
rated dissipation
at T
amb
= 70
℃
max. working voltage
max. overload voltage
dielectric withstanding
voltage(during 1 min.)
basic specifications
safety requirements
climatic category (IEC60)
stability,
∆R/R
max. after
load : 1000 hours
soldering heat
overload :
√
Pn x R x 2.5
during 1 min.
high voltage surge:
±
10%
(1nF capacitor2.5s charge
2.5s discharge 10 cycles)
VALUE
SR25
SR37
10Ω to 9.1
㏀
±10%, ±15%
( E12, E24 series )
±
600 ppm /
℃
0.25 W
250 V
500 V
ac, 500 V
0.5 W
350 V
700 V
ac, 700 V
IEC 60 115-1B
UL:1676
CSA : 22.2
VDE : 0860
55 / 155 / 56
±
5%
+0.1Ω
±
3%
+0.1Ω
±
10%
+0.1Ω
10Ω - 3.3
㏀
: 2K
3.6
㏀
- 9.1
㏀
: 3K
10Ω - 4.7
㏀
: 7K
10Ω - 9.1
㏀
: 10K
5.1
㏀
- 3.3
㏀
: 10K
±
10%
+0.1Ω
1W
500 V
1000 V
ac, 700 V
SR52
-
C – UL(CSA22.2)
VDE : 0860
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