False turn-on of a thyristor by large \(\rm \frac{dv}{dt}\) can be prevented by using a _________ circuit in _________ with the device.

dv/dt Protection of SCR

• When the SCR is forward biased, junctions J₁ and J₃ are forward biased and junction J₂ is reverse biased. This reverse biased junction J2 exhibits the characteristics of a
  capacitor.
• If the rate of forward voltage applied is very high across the SCR, the charging current flows through the junction J₂ is high. This current is enough to turn ON the SCR even without any gate signal.
• This is called as dv/dt triggering of the SCR. This can be reduced by using RC snubber network across the SCR.
• False turn - ON of an SCR by large dv/dt, even without application of gate signal, can be prevented by using a snubber circuit.
• False turn-on of a thyristor by large \(\rm \frac{dv}{dt}\) can be prevented by using a snubber circuit in parallel with the device.