AC line switch basic application

ACST4

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AC line switch basic application

The ACST4 device has been designed to switch on and off low power, but highly inductive or

resistive loads such as dishwashers spray pumps, and air-conditioners fan.

ACST4-7S triggering current has to be sunk from the gate pin G. The switch can then be

driven directly by logic level circuits through a resistor as shown on the typical application

diagram .

Thanks to its thermal and turn off commutation performances, the ACST4 switch is able to

drive with no turn off additional snubber an inductive load up to 4 A.

Figure 2.

Typical application diagram

OUT

COM

G

ACST4

ST72 MCU

N

AC

MAINS

L

R

- Vcc

M

LOAD

OUT

L