Uncontrolled Rectifier


Only diode are used

Trigger circuit are not required

Firing angle is fixed and always zero

It is used as low power rating

Application: Dc power supply for constant DC supply requirement

Controlled Rectifier


Only SCR or SCR and diode are used

Trigger circuit are required

Variable firing angle

It is used at medium and high power rating

Application: Dc motor speed control,DC traction system,heating control