SSRP105B1 Datasheet, PDF (1/6 Pages) STMicroelectronics – DUAL ASYMMETRICAL OVERVOLTAGE PROTECTION FOR TELECOM LINE

®
Application Specific Discretes
ASD™
SSRP105B1
DUAL ASYMMETRICAL OVERVOLTAGE
PROTECTION FOR TELECOM LINE
MAIN APPLICATIONS
Where asymmetrical protection against lightning
strikes and other transient overvoltages is required :
s Solid-State relays
s SLIC with integrated ring generator
DESCRIPTION
The SSRP105B1 is a dual asymmetrical transient
voltage suppressor designed to protect a
solid-state ring relay or SLICs with integrated ring
generator from overvoltages.
The asymmetrical protection configuration is
necessary to allow the use of all different types of
ringing schemes.
FEATURES
s Dual bi-directional asymmetrical protection
Stand-off voltages:
q Between Line and Ground
+105V for positive voltages
-180V for negative voltages
q Between Line and Line
+180V for positive voltages
-180V for negative voltages
s Peak pulse current: I_PP = 50A (5/310µs)
s Holding current:
q I_H+ = 100mA
q I_H- = 150mA
COMPLY WITH THE FOLLOWING STANDARDS
ITU-T K20 / K21
VDE0433
IEC61000-4-5
FCC Part 68
BELLCORE
GR1089 First level
Peak Surge
Voltage
(V)
1500
2000
Level 3
Level 4
1500
800
2500
1000
Voltage
Waveform
(µs)
10/700
10/700
10/700
1.2/50
10/160
10/560
2/10
10/1000
SO-8
FUNCTIONAL DIAGRAM
TIP 1
NC ₂
NC ₃
RING 4
8 GND
7 GND
6 GND
5 GND
Current
Waveform
(µs)
5/310
5/310
5/310
8/20
10/160
10/560
2/10
10/1000
Required
Peak
current
(A)
38
50
50
100
200
100
500
100
Min. serial
resistor to meet
standards
(Ω)
-
-
-
-
18
10
10
19
TM: ASD is trademarks of STMicroelectronics.
October 2002 - Ed: 1A
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