Datasheet

SMP100MC Application information

Doc ID 9699 Rev 5 7/13

Figure 11. Typical circuits

Figure 12. Test method of the board having fuse and Trisil

These topologies, using SMP100MC from ST and TCP1.25 A 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.

Figure 13. Trisil turns on during lightning surge

Test conditions:

2/10 µs + and -2.5 and 5 kV 500 A (10 pulses of each polarity), T

amb

= 25 °C

Test result:

Fuse and Trisil OK after test in accordance with GR1089 requirements.

Fuse TCP 1.25A

SMP100MC-xxx

Fuse TCP 1.25A

Tip S

Gnd

SMP100MC-xxx

Ring S

SMP100MC-xxx

Fuse TCP 1.25A

Tip L

Gnd

Ring L

Typical circuit for subscriber side Typical circuit for central office side

Surge

Generator

Device to be protected

Oscilloscope

I surge

Line side

Voltage probe

Current probe

Test board