Parameters

AN2703

4/9

Holding current

This is the current level circulating through anode and cathode (or A2 and A1 for

a TRIAC) under which the device turns off, without gate current.

Latching current

This is the current level circulating through anode and cathode (or A2 and A1 for

a TRIAC) to keep the device conducting after removal of the gate current.

If the anode current is under this value after having removed the gate current,

the device switches off. For TRIACs, the IL value is higher in Q2 quadrant.

dV/dt

Critical rate of rise of off-state voltage

This is the maximum value of rate of the rising voltage that can be applied

across anode and cathode of the SCR (or across A2 and A1 for a TRIAC)

without risking turning it on spuriously.

Critical rate of decrease of commutating on-state current

This is the maximum rate of decrease of the anode current allowed to turn the

TRIAC off. Above this value, the TRIAC can remains ON in next reverse polarity.

For standard, logic level TRIACs and ACSs, the (dI/dt)c is specified with a limited

(dV/dt)c parameter.

For Snubberless TRIACs, this value is specified without it.

Critical rate of rise of commutating off-state voltage

This is the maximum rate of rise of the reapplied voltage during turn-off. Above

this limit, the TRIAC may remain ON without any gate current.

Clamping voltage

This is the voltage level, applied across OUT and COM terminals, from which

the device enters in avalanche mode. It is only defined for ACS and ACST

devices which internally feature an overvoltage protection capability.

Breakover voltage

This is the voltage measured across the terminals of a DIAC or across OUT and

(no gate current). Above this point, the device will turn on in breakover mode.

Breakover current

This is current flowing through a DIAC or an ACS just before that the device

switches on in the breakover mode.

Peak on-state voltage drop

This is the voltage across the device while it is on-state. It is specified at the

Peak forward voltage drop

This is the voltage across a diode when the diode is conducting.

Table 2.

Electrical characteristics parameters (continued)

Parameter

Name and description