SSP
Vishay Dale
PTC Over Current Thermistors
FEATURES
• Transistor protection.
• Motor protection.
• Transformer protection.
• Telecommunication line protection.
PTC Over Current Protectors are used in series to protect
from over current conditions. The PTC will switch from its
normal low resistance to a very high resistance state reducing
the current flow to a safe level. Once this over current
condition has been removed, the PTC will cool to its normal
(low) resistance.
STANDARD ELECTRICAL SPECIFICATIONS and DIMENSIONS in inches [millimeters]
D
L
0.5
Min.
Max. Continuous Min. Switching
Current-Imcc*
(Amps.)
Current-Imsc**
(Amps)
Switch
Temp.
Max.
Current
D
L
R0 @ 25°C
Dc
Max. Body Lead
Part Number
(Ω) ± 20% Tsw ± 5°C
55°C
35°C
15°C
0°C
Vmax (Amps.) (mW/°C) Dia. (In.) Dia. (In.)
SSP-8004DA0R8M
0.8
0.78
0.96
1.60
1.76
12
15
15
20
25
25
25
50
50
50
50
50
50
132
132
25
132
50
4
3.5
3.5
3
17
14
14
13
13
10
9
0.80
0.60
0.60
0.55
0.55
0.45
0.40
0.40
0.40
0.40
0.30
0.40
0.35
0.75
0.60
0.45
0.60
0.40
0.032
0.032
0.032
0.032
0.032
0.025
0.025
0.020
0.020
0.020
0.020
0.025
0.020
0.032
0.032
0.025
0.032
0.020
SSP-8004DA1R0M
SSP-8004DA0R3M
SSP-5504DA1R5M
SSP-5504DA2R0M
SSP-4504DA3R3M
SSP-4004DA4R7M
SSP-4004DA7R5M
SSP-4004DA100M
SSP-4004DA150M
SSP-3005DA200M
SSP-4008DA500M
SSP-3505DA101M
SSP-7510DB4R7M
SSP-6010DB6R8M
SSP-4505DB5R0M
SSP-6010DB100M
SSP-4004DB7R5M
1.0
1.3
1.5
2.0
3.3
0.60
0.55
0.50
0.43
0.30
0.22
0.17
0.15
0.12
0.100
0.065
0.045
0.28
0.22
0.20
0.18
0.15
0.75
0.70
0.60
0.50
0.35
0.28
0.22
0.19
0.15
0.123
0.080
0.06
0.35
0.28
0.25
0.22
0.20
1.30
1.20
1.05
0.90
0.68
0.50
0.42
0.35
0.30
0.25
0.15
0.095
0.65
0.50
0.47
0.45
0.40
1.43
1.28
1.12
0.97
0.73
0.55
0.48
0.42
0.35
0.30
0.18
0.12
0.70
0.55
0.52
0.49
0.45
2
2
120
4.7
2
(DA)
7.5
1.5
1.5
1.5
1.5
0.8
0.8
2
8
10.0
15.0
20.0
50.0
100.0
4.7
8
8
7
8
7
17
15
10
15
8
6.8
1
110
(DB)
5.0
2
10.0
7.5
1
1.5
*Maximum Continuous Current (Imcc): The maximum amount of current which a PTC Thermistor must be able to pass without switching into
its high resistance state. Expressed in Amps. **Minimum Switching Current (Imsc): The minimum amount of current necessary to switch the
thermistor into its high resistance state. Expressed in Amps.
Document Number 33019
Revision 04-Sep-01
For technical questions, contact thermistor1@vishay.com
www.vishay.com
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