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:

Test result:

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

Fuse TCP 1.25A

T1

T2

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

V

Oscilloscope

I surge

Line side

Voltage probe

Current probe

Test board