ST SMP75-8 User Manual
SMP75
® |
SMP75-8 |
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TRISILTM
FEATURES
■Bidirectional surge arrestor.
■Very low stand-off voltage : VRM = 8 V.
■High repetitive surge capability :
IPP = 75 A (10/1000μs).
■Very low capacitance : C < 75 pF
■Low leakage current : < 2 μA
DESCRIPTION
The SMP75-8 is a very low voltage transient surge arrestor especially designed to protect sensitive telecommunication equipment against lightning strikes and other transients.
MAIN APPLICATION
XDSL TRANSMISSION EQUIPMENT
BENEFITS
■Protection against high energy surges.
■Very low breakover voltage : VBO < 15 V, thus
avoiding saturation of transformer.
■No signal distortion thanks to very low capacitance.
SMB
(JEDEC DO-214AA)
SCHEMATIC DIAGRAM
COMPLIES WITH THE FOLLOWING STANDARDS :
- BELLCORE TR-NWT |
|
μs |
|
-000974: |
10/1000 |
1 kV |
|
|
10/1000 |
μs |
75A * |
- CCITT K20: |
10/700 μs |
4 kV |
|
|
5/310 |
μs |
100A |
- VDE 0433: |
10/700 μs |
4 kV |
|
|
5/310 |
μs |
100A |
- VDE 0878: |
1.2/50 μs |
4 kV |
|
|
1/20 |
μs |
100A |
* with series resistor or PTC.
August 2001 - Ed : 2 |
1/6 |
SMP75-8
ABSOLUTE MAXIMUM RATINGS (Tamb = 25°C)
Symbol |
Parameter |
|
Value |
Unit |
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Ipp |
Peak pulse current |
|
10/1000μs |
75 |
A |
|
|
|
8/20μs |
250 |
A |
ITSM |
Non repetitive surge peak on-state current |
|
50Hz |
35 |
A |
|
One cycle |
|
60Hz |
37 |
A |
|
Non repetitive surge peak on-state current |
|
0.2s |
14 |
A |
|
F = 50Hz |
|
2s |
6 |
A |
TI |
Maximum lead temperature for soldering during 10s |
|
260 |
°C |
|
Tstg |
Storage temperature range |
|
|
- 55 to + 150 |
°C |
Tj |
Maximum junction temperature |
|
|
150 |
°C |
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THERMAL RESISTANCES |
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Symbol |
Parameter |
|
Value |
Unit |
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Rth(j-I) |
Junction to leads |
|
20 |
°C/W |
|
Rth(j-a) |
Junction to ambient on printed circuit |
|
100 |
°C/W |
|
|
(with standard footprint dimensions) |
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Note 1: Pulse waveform
10 |
/ 1000 μs |
tr = 10 μs |
|
8 |
/ |
20 μs |
tr = 8 μs |
5 |
/ |
310 μs |
tr = 5 μs |
1 |
/ |
20 μs |
tr = 1 μs |
2 |
/ |
10 μs |
tr = 2 μs |
tp = 1000 μs tp = 20 μs tp = 310 μs tp = 20 μs tp = 10 μs
% IPP |
|
100 |
|
50 |
|
0 |
tp |
tr |
ELECTRICAL CHARACTERISTICS (Tamb = 25°C)
Symbol |
Parameter |
|
|
VRM |
Stand-off voltage |
IRM |
Leakage current at stand-off volt- |
|
age |
VR |
Continuous Reverse voltage |
VBR |
Breakdown voltage |
VBO |
Breakover voltage |
IH |
Holding current |
IBO |
Breakover current |
IPP |
Peak pulse current |
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