SKS
Vishay Draloric
Carbon Film Resistors, Fusible Type
FEATURES
• Fusible resistor for constant voltage designed for over
load protection
• Special construction opens the resistor at a specified
overload
• Non inflammable coating
• Defined switch-off behaviour
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
SIZE
POWER RATING
P
70˚C
W
0.30
0.35
0.50
1.0
1.3
TOLERANCE
%
5, 10
5, 10
5, 10
5, 10
5, 10
• Coating: red brown
RESISTANCE
RANGE
Ω
1R0 - 5K1
1R0 - 5K1
1R0 - 5K1
1R0 - 5K1
1R0 - 5K1
• Marking: 5
th
band yellow
SKS2
SKS3
SKS4
SKS5
SKS8
•
R
i
≥
6Ω for R
N
< 10R
R
i
≥
1Ω for R
N
≥
10R
0207
0309
0414
0617
0922
TECHNICAL SPECIFICATIONS
PARAMETER
Rated Dissipation at 70°C
Overload to Fuse
Time to Fuse (max)
Max. Permissible Voltage
Voltage Coefficient
Current Noise
Thermal Resistance (max)
Thermal Time Constant
Category Temperature Range
Failure Rate
Weight
UNIT
W
W
sec.
V
1/V
µV
/ V
K/W
sec.
°C
10
-9
/h
g
0.2
0.36
< 10
-7
< 0.1
220
8
< 10
-7
< 0.1
180
11
SKS2
0.30
3.5
40
SKS3
0.35
5.0
40
SKS4
0.50
7.0
70
See Diagram
< 10
-7
< 0.1
130
20
- 55 / +125
< 30
0.7
1.5
3.3
< 10
-7
< 0.1
80
35
< 10
-7
< 0.1
60
70
SKS5
1.0
14.0
80
SKS8
1.3
21.0
100
ORDERING INFORMATION
SKS2
MODEL
100R
RESISTANCE VALUE
Ω
5%
TOLERANCE
A5
PACKAGING
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108
For Technical Questions, contact ff1aresistors@vishay.com
Document Number 20138
Revision 31-May-01
SKS
Carbon Film Resistors, Fusible Type
DIMENSIONS
6 mm*
L
1
L
D
d
SKS2
SKS3
e
B
• Taping in acc. with IEC60286-1
• D and L measured in acc. with IEC60294
• d according to IEC60301
1)
Also available in 26mm tape spacing
* 9mm for SKS5, SKS8
SKS4
SKS5
SKS8
2.5 - 0.5
3.2 - 0.5
6.0 - 0.5
8.5 - 1.0
7.5
10.0
15.0
17.5
22.5
53
±
1
1)
53
±
1
73
±
1
77
±
1
77
±
1
0.6
0.6
0.8
0.8
0.8
7.5
10
15
17.5
22.5
MODEL
D
Vishay Draloric
DIMENSIONS
in millimeters
L
L1max
B
d
e
4.1 - 0.5 12.0 - 1.5
6.0 - 0.5 16.5 - 1.5
9.0 - 0.5 20.0 - 1.5
% RATED POWER
120
100
80
60
40
20
0
- 55
- 25
0
25
50
DERATING
75 100
125 150 175 200
AMBIENT TEMPERATURE IN ˚C
70
FUSING TIME (AT U = CONSTANT)
FUSING TIME t (s)
FUSING TIME t (s)
100
70
50
30
20
10
7
5
3
2
100
70
50
30
20
10
7
5
3
2
SKS2 SKS3
SKS4
SKS5
SKS8
1
0.7
0.5
0
1,8
3,5
1
0.7
0.5
5
6,5
10
14
15
17
20
5
7
10
14
15
19
20
21
25
30
35
40
45
50
55
56
60
OPENING POWER P [W]
Calculated with rated resistance
OPENING POWER P [W]
Calculated with rated resistance
Document Number 20138
Revision 31-May-01
For Technical Questions, contact ff1aresistors@vishay.com
www.vishay.com
109
SKS
Vishay Draloric
Carbon Film Resistors, Fusible Type
APPROXIMATE VALUES FOR Û MAX IN CASE OF FAILURE AND MAX PULSE VOLTAGE
1000 Secondary conditions:
700 Impulse load
500 a) P
max.
see Pulse Load
diagrams below
300 b)
ϑu ≤
40°C
200
VOLTAGE U [V]
SKS8
SKS5
SKS4
SKS3
SKS2
100
70
50
30
20
10
1
10
100
RESISTANCE VALUES
Ω
1K
10K
POWER RATING P [W]
100
50
POWER RATING P [W]
Secondary conditions:
a) P
≤
40˚C
b)
ϑu ≤
40°C
c) Ûmax see diagram
above
100
50
Secondary conditions:
a) P
≤
40˚C
b)
ϑu ≤
40°C
c) Ûmax see diagram above
10
5
10
5
SKS5 / 8
SKS4
SKS3
SKS5 / 8
SKS3
SKS4
1
0.5
SKS2
1
0.5
SKS2
0.1
10
–4
0.1
10
–3
10
–2
10
–1
10
0
10
10
–4
10
–3
10
–2
10
–1
10
0
10
PULSE LOAD P
≤
P40
R
≥
10
Ω
RECTANGLE t
i
(s)
PULSE LOAD P
≤
P40
R <10
Ω
RECTANGLE t
i
(s)
POWER RATING P [W]
POWER RATING P [W]
100
50
Secondary conditions:
a) P
¡
0 (single pulse)
b)
ϑu ≤
40°C
c) Ûmax see diagram
SKS5 / 8
100
50
Secondary conditions:
a) P
¡
0 (single pulse)
b)
ϑu ≤
40°C
c) Ûmax see diagram above
10
5
SKS5 / 8
10
5
SKS4
SKS3
SKS2
SKS4
SKS3
1
1
0.5
0.5
SKS2
0.1
10
–4
10
–3
10
–2
10
–1
10
0
0.1
10
10
–4
10
–3
10
–2
10
–1
10
0
10
PULSE LOAD P
0 R
≥
10
Ω
RECTANGLE t
i
(s)
PULSE LOAD P
0 R <10
Ω
RECTANGLE t
i
(s)
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110
For Technical Questions, contact ff1aresistors@vishay.com
Document Number 20138
Revision 31-May-01
SKS
Carbon Film Resistors, Fusible Type
PERFORMANCE
TEST
Voltage Coefficient
Ohmic Value after Fusing
Temperature Coefficient
Non-Linearity
Damp Heat steady state
CONDITIONS
1/V
Ω
10
-6
/K
dB
56 days, 40°C, 90-95% humidity
RESULTS
< 10
-7
> 10 X R
N
R < 10Ω: + 200; R
≥
10Ω:- 300.. - 500
SKS1 = 90; SKS2 to 8 =100
≤
1%
Vishay Draloric
Document Number 20138
Revision 31-May-01
For Technical Questions, contact ff1aresistors@vishay.com
www.vishay.com
111
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