115 VAC
R1
D1
1
2
6
5
VCC
Rin
MOC3031M
MOC3032M
MOC3033M
SCR
SCR
180
3
4
R2
D2
LOAD
Figure 14. Inverse-Parallel SCR Driver Circuit
(MOC3031M, MOC3032M, MOC3033M)
Suggested method of firing two, back-to-back SCR’s with a Fairchild triac driver. Diodes can be 1N4001; resistors, R1 and R2, are
optional 1 k ohm.
240 VAC
R1
D1
1
2
6
5
VCC
Rin
MOC3041M
MOC3042M
MOC3043M
SCR
SCR
360
3
4
R2
D2
LOAD
Figure 15. Inverse-Parallel SCR Driver Circuit
(MOC3041M, MOC3042M, MOC3043M)
Suggested method of firing two, back-to-back SCR’s with a Fairchild triac driver. Diodes can be 1N4001; resistors, R1 and R2, are
optional 330 ohm.
Note: This optoisolator should not be used to drive a load directly. It is intended to be a trigger device only.
7
www.fairchildsemi.com
MOC3031M, MOC3032M, MOC3033M, MOC3041M, MOC3042M, MOC3043M Rev. 1.0.1
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
