MOC3021 MOC3022 MOC3023

4

Motorola Optoelectronics Device Data

Rin

1

2

6

4

360

MOC

3021/

3022/

3023

470

0.05

µF

Figure 8. Typical Application Circuit

3

5

0.01

µF

39

HOT

240

VAC

GROUND

LOAD

VCC

* This optoisolator should not be used to drive a load directly. It is in-

tended to be a trigger device only.

In this circuit the “hot” side of the line is switched and the

load connected to the cold or ground side.

The 39 ohm resistor and 0.01

µF capacitor are for snub-

bing of the triac, and the 470 ohm resistor and 0.05

µF ca-

pacitor are for snubbing the coupler. These components

may or may not be necessary depending upon the particu-

lar triac and load used.

Additional information on the use of optically coupled triac

drivers is available in Application Note AN–780A.