Trisil characteristics

AN320

2/13

Doc ID 5649 Rev 3

1

Trisil characteristics

1.1

Electrical characteristic

The electrical characteristic of the Trisil is similar to that of a Triac (see Figure 1) except that

the component has only two terminals.

Triggering in this case is not done via a gate but by an internal mechanism dependent on the

current flowing through it.

1.2

Operation seen from the outside

In normal operation, the Trisil is biased at a voltage lower than or equal to the standby

presence of the Trisil connected across the equipment to be protected does not disturb its

operation (see Figure 2).

The characteristic data at this point includes:

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Leakage current

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Electrical capacity

●

Reliability of the component in blocking mode

Figure 2.

Stand by characteristics

few ohms. The Trisil remains biased at its avalanche voltage and its operation is then

identical to that of a Transil diode (see Figure 3).

The characteristic parameters at this level are the limiting voltage (breakover voltage of the

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