MAC97 Series
Voltage Current Characteristic of Triacs
(Bidirectional Device)
+ Current
Quadrant 1
MainTerminal 2 +
Symbol
V
DRM
I
DRM
V
RRM
I
RRM
V
TM
I
H
Parameter
Peak Repetitive Forward Off State Voltage
Peak Forward Blocking Current
Peak Repetitive Reverse Off State Voltage
Peak Reverse Blocking Current
Maximum On State Voltage
Holding Current
Quadrant 3
MainTerminal 2 −
I
H
V
TM
I
RRM
at V
RRM
on state
I
H
V
TM
off state
+ Voltage
I
DRM
at V
DRM
Quadrant Definitions for a Triac
MT2 POSITIVE
(Positive Half Cycle)
+
(+) MT2
(+) MT2
Quadrant II
(−) I
GT
GATE
MT1
REF
(+) I
GT
GATE
MT1
REF
Quadrant I
I
GT
−
(−) MT2
(−) MT2
+ I
GT
Quadrant III
(−) I
GT
GATE
MT1
REF
(+) I
GT
GATE
MT1
REF
Quadrant IV
−
MT2 NEGATIVE
(Negative Half Cycle)
All polarities are referenced to MT1.
With in−phase signals (using standard AC lines) quadrants I and III are used.
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