BT151D STMicroelectronics, BT151D Datasheet - Page 6

• Manufacturer Part Number: BT151D
• Description: Tripolar Overvoltage Protection For Telecom Line
• Manufacturer: STMicroelectronics

Application information
2
6/10
Figure 7.
Application information
Figure 8.
1.
2.
Connect pins 2, 3, 6 and 7 to Ground to guarantee a good surge current capability for
long duration disturbances.
To take advantage of the" 4-point“ structure of the THBT, the TIP and RING lines have
to cross the device. In this case, the device will eliminate the overvoltages generated by
the parasitic inductances of the wiring (Ldi/dt), especially for very fast transients.
Surge peak current versus overload duration
Device connections
10
9
8
7
6
5
4
3
2
1
0
1E-2
I
GND
TSM
(A)
RING
TIP
1E-1
1
2
3
4
1E+0
t(s)
1E+1
THBT15011, THBT20011, THBT27011
8
7
6
5
1E+2
TIP
RING
F=50Hz
Tj initial=25°C
GND
1E+3