Abstract: A direct current voltage controlled triggering circuit for triacs connected via a consumer resistor to an alternating current supply voltage uses the controllable channel resistance of a field effect rransistor to distribute loading current among a series connection of capacitors connected via a load resistor and the consumer resistor to the a.c. supply voltage. A connection point of the load resistor and a load capacitor in the series connection is connected via a diac to the gate electrode of the triac, and the remaining series connected capacitors have an approximately equal value to provide symmetrization of the current flow phase angle for the diac.