Any sensitive equipment requiring protection
against lightning strikes and power crossing.
These devices are dedicated to central office protection as they comply with the most stressfull
standards.
Their Micro Capacitance make them suitable for
ADSL2+ and low end VDSL.
DESCRIPTION
The SMP100MC is a series of micro capacitance
transient surge arrestors designed for the protection of high debit rate communication equipment.
Its micro capacitance avoids any distortion of the
signal and is compatible with digital transmission
line cards (ADSL, VDSL, ISDN...).
Compatible with Cooper Bussmann fuse:
TCP 1.25A.
Trisils are not subject to ageing and provide a fail
safe mode in short circuit for a better protection.
They are used to help equipment to meet main
standards such as UL60950, IEC950 / CSA C22.2
and UL1459. They have UL94 V0 approved resin.
SMB package is JEDEC registered (DO-214AA).
Trisils comply with the following standards GR1089 Core, ITU-T-K20/K21, VDE0433, VDE0878,
IEC61000-4-5 and FCC part 68.
December 2004
REV. 1
1/10
SMP100MC
Table 2: In compliance with the following standards
STANDARD
GR-1089 Core
First level
GR-1089 Core
Second level
GR-1089 Core
Intra-building
ITU-T-K20/K21
ITU-T-K20
(IEC61000-4-2)
VDE0433
VDE0878
IEC61000-4-5
FCC Part 68, lightning
surge type A
FCC Part 68, lightning
surge type B
Peak Surge
Voltag e
(V)
2500
1000
50002/10 µs5002/10 µs0
15002/10 µs1002/10 µs0
6000
1500
8000
15000
4000
2000
4000
2000
4000
4000
1500
800
10009/720 µs255/320 µs0
Waveform
Voltag e
2/10 µs
10/1000 µs
10/700 µs
1/60 ns
10/700 µs
1.2/50 µs
10/700 µs
1.2/50 µs
10/160 µs
10/560 µs
Required
peak current
(A)
500
100
150
37.5
Current
waveform
2/10 µs
10/1000 µs
5/310 µs
ESD contact discharge
ESD air discharge
100
50
100
50
100
100
200
100
5/310 µs
1/20 µs
5/310 µs
8/20 µs
10/160 µs
10/560 µs
Minimum serial
resistor to meet
standard (Ω)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 3: Absolute Ratings (T
amb
= 25°C)
SymbolParameterValueUnit
100
400
140
150
200
400
500
18
9
7
4
20
21
-55 to 150
150
I
PP
I
FS
I
TSM
I
T
T
T
Note 1: in fail safe mode, the device acts as a short circuit
Repetitive peak pulse current
Fail-safe mode : maximum current (note 1)8/20 µs5kA
Non repetitive surge peak on-state current (sinusoidal)
2
tI2t value for fusing
Storage temperature range
stg
Maximum junction temperature
j
Maximum lead temperature for soldering during 10 s.260°C
L
10/1000 µs
8/20 µs
10/560 µs
5/310 µs
10/160 µs
1/20 µs
2/10 µs
t = 0.2 s
t = 1 s
t = 2 s
t = 15 mn
t = 16.6 ms
t = 20 ms
A
A
A2s
°C
2/10
SMP100MC
Table 4: Thermal Resistances
SymbolParameterValueUnit
R
R
th(j-a)
th(j-l)
Junction to ambient (with recommended footprint)100°C/W
Junction to leads20°C/W
Figure 7: Relative variation of leakage current
versus junction temperature (typical values)
I [Tj] / I [Tj=25°C]
RR
1.E+03
1.E+02
1.E+01
1.E+00
V =243V
R
Tj(°C)
255075100125
4/10
SMP100MC
Figure 8: Variation of thermal impedance
junction to ambient versus pulse duration
(Printed circuit board FR4, SCu=35µm,
Figure 9: Relative variation of junction
capacitance versus reverse voltage applied
(typical values)
recommended pad layout)
Z/R
th(j-a) th(j-a)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1.E-021.E-011.E+001.E+011.E+021.E+03
tp(s)
C [V ] / C [V =2V]
RR
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1101001000
V (V)
R
F =1MHz
V= 1V
OSCRMS
Tj = 25°C
APPLICATION NOTE
In wireline applications, analog or digital, both central office and subscriber sides have to be protected.
This function is assumed by a combined series / parallel protection stage.
Ring
relay
Line
Protection stage
Ex. Analog line cardEx. ADSL line card or terminal
Line
Protection stage
In such a stage, parallel function is assumed by one or several Trisil, and is used to protect against short
duration surge (lightning). During this kind of surges the Trisil limits the voltage across the device to be
protected at its break over value and then fires. The fuse assumes the series function, and is used to protect the module against long duration or very high current mains disturbances (50/60Hz). It acts by safe
circuits opening. Lightning surge and mains disturbance surges are defined by standards like GR1089,
FCC part 68, ITU-T K20.
Fuse TCP 1.25A
Tip S
SMP100MC-xxx
Gnd
SMP100MC-xxx
Ring S
Fuse TCP 1.25A
T1
SMP100MC-xxx
T2
Tip L
Gnd
Fuse TCP 1.25A
Ring L
Typical circuit for subscriber sideTypical circuit for central office side
5/10
SMP100MC
Following figure shows the test method of the
board having Fuse and Trisil.
Surge
Generator
Current probe
I surge
Line side
Test board
Oscilloscope
Device to be protected
V
Voltage probe
These topologies, using SMP100MC from ST and
TCP1.25A from Cooper Bussmann, have been
functionally validated with a Trisil glued on the
PCB. Following example was performed with
SMP100MC-270 Trisil. For more information, see
Application Note AN2064.
Following curve shows the turn on of the Trisil during
lightning surge.
Test conditions:
2/10µs + and -2.5 and 5kV 500A (10 pulses of each
polarity), T
amb
= 25°C
Test result:
Fuse and Trisil OK after test in accordance with
GR1089 requirements
Following curve shows Trisil action while the fuse
remains operational.
Test conditions:
600V 3A 1.1s (first level), T
amb
= 25°C
Test result:
Fuse and Trisil OK after test in accordance with
GR1089 requirements
In case of high current power cross test, the fuse acts
like a switch by opening the circuit.
Test conditions:
277V 25A (second level), T
amb
= 25°C
Test result:
Fuse safety opened and Trisil OK after test in
accordance with GR1089 requirements
6/10
Figure 10: Test circuit 1 for Dynamic IBO and VBO parameters
100 V / µs, di /dt < 10 A / µs, Ip p = 100 A
SMP100MC
U
KeyTek 'System 2' generator with PN246I module
10 µF
1 kV / µs, di/dt < 10 A / µs, Ip p = 10 A
26 µH
U
KeyTek 'System 2' generator with PN246I module
60 µF
Figure 11: Test circuit 2 for I
2 Ω
12 Ω
and VBO parameters
BO
45 Ω
250 Ω
ton = 20ms
83 Ω
66 Ω
470 Ω
47 Ω
K
46 µH
R1 = 140Ω
0.36 nF
46 µH
220V 50Hz
Vout
1/4
TEST PROCEDURE
Pulse test duration (tp = 20ms):
●
for Bidirectional devices = Switch K is closed
●
for Unidirectional devices = Switch K is open
Vselection:
OUT
●
Device with V < 200V V= 250 V, R1 = 140
●
Device with V200VV= 480 V, R2 = 240
➔Ω
BOOUTRMS
≤Ω➔
BOOUTRMS
R2 = 240Ω
IBO
measurement
DUT
VBO
measurement
7/10
SMP100MC
Figure 12: Test circuit 3 for dynamic I
R
V
=-48V
BAT
This is a GO-NOGO test which allows to confirm the holding current (I ) level in a
functional test circuit.
TEST PROCEDURE
1/ Adjust the current level at the I value by short circuiting the AK of the D.U.T.
2/ Fire the D.U.T. with a surge currentH➔
3/ The D.U.T. will come back off-state within 50ms maximum.
Part NumberMarkingPackageWeightBase qtyDelivery mode
SMP100MC-120ML12
SMP100MC-140ML14
SMP100MC-160ML16
SMP100MC-200ML20
SMB0.11 g2500Tape & reel
SMP100MC-230ML23
SMP100MC-270ML27
Table 6: Revision History
DateRevisionDescription of Changes
September-20030BFirst issue.
14-Dec-20041Absolute ratings values, table 3 on page 2, updated.
9/10
SMP100MC
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