SMP100LC

6/10

Following figure shows the test method of the

board having Fuse and Trisil.

Following curve shows the turn on of the Trisil during

lightning surge.

These topologies, using SMP100LC from ST and

TCP1.25A from Cooper Bussmann, have been

functionally validated with a Trisil glued on the

PCB. Following example was performed with

SMP100LC-270 Trisil. For more information, see

Application Note AN2064.

Test conditions:

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

Test result:

Fuse and Trisil OK after test in accordance with

GR1089 requirements

Following curve shows Trisil action while the fuse

remains operational.

In case of high current power cross test, the fuse acts

like a switch by opening the circuit.

Test conditions:

Test result:

Fuse and Trisil OK after test in accordance with

GR1089 requirements

Test conditions:

Test result:

Fuse safety opened and Trisil OK after test in

accordance with GR1089 requirements

Surge

Generator

Device to be protected

V

Oscilloscope

I surge

Line side

Voltage probe

Current probe

Test board

I surge (100A/div)

V (50V/div)

I surge (2A/div)

V (100V/div)

I surge (10A/div)

V (100V/div)