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FEATURES
GALAXY ELECTRICAL
DB3.DB4
VOLTAGE RANGE: 28-45 V
SILICON BIDIRECTIONAL DIACS
The three layer,two termnal,axial lead,hermetically
1111sealed
diacs are designed specifically for triggering
1111thyristors.They
demonstrate low breakover current at
1111breakover
voltage as they withstand peak pulse
1111current,The
breakover symmetry is within three
1111volts(DB3,DB4).
These diacs are intended for use in
CCCthyrisitors
phase control,circuits for lamp dimming,
FFFI
universal motor speed control,and heat control.
DO-35(GLASS)
Dimensions in millimeters
ABSOLUTE RATINGS
Parameters
Power dissipation on printed
T
A
=50
o
C circuit (L=10mm)
Repetitive peak on-state
current
tp=20 S
f=120Hz
Symbols
DB3,DB4
UNITS
Pc
150.0
mW
I
TRM
T
J
T
STG
2.0
-40--- +125
-40--- +125
A
o
o
Operating junction temperature
Storage temperature
C
C
ELECTRICAL CHARACTERISTICS
Parameters
Test Conditions
Min
Breakover voltage
(NOTE
1)
V
BO
I+V
BO
I-
I-V
BO
I
I±
VI
V
o
I
BO
t
r
I
R
C=22nf
(NOTE 2)
See FIG.1
C=22nf
(NOTE 2)
See FIG.1
I=(I
BO
to I
F
=10mA)
See FIG.1
See FIG.2
C=22nf
(NOTE 2)
See FIG.3
V
R
=0.5 V
BO
See FIG.1
DB3
28
32
36
±3.0
DB4
35
40
45
UNITS
Typ
Max
V
Breakover voltage symmetry
Dynamic breakover voltage
(NOTE 1)
Output voltage
(NOTE 1)
Breakover current
(NOTE 1)
Rise time
(NOTE 1)
Leakage current
(NOTE 1)
Max
Min
Min
Max
Typ
Max
V
V
V
A
S
A
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5.0
5.0
100.0
1.5
10.0
NOTE: 1.Electrical characteristics applicable in both forw ard and reverse dirctions.
2.Connected in parallel w ith the devices
Document Number 0283003
BL
GALAXY ELECTRICAL
1.
RATINGS AND CHARACTERISTIC CURVES
FIG.1--VOLTAGE-CURRENT CHARACTERISTIC CURVE
DB3.DB4
FIG.2--TEST CIRCUIT FOR OUTPUT VOLTAGE
+I
F
10mA
-V
I
BO
I
B
0.5V
BO
+V
10KΩ
500KΩ
D.U.T
220V
60Hz
0.1
µ
F
V
o
R=20
Ω
Ｖ
V
BO
-I
F
FIG.3-- TEST CIRCUIT SEE FIG.2 ADJUST R FOR I
P
=0.5A
FIG.4--POWER DISSIPATION VERSUS AMBIENT
TEMPERATURE (MAXIMUM VALUES)
P(mW)
160
140
90%
I
P
120
100
80
60
10%
tr
40
20
0
0
10
20 30
40 50
60
70
80
90
100 110 120 130
Tamb(
℃ )
FIG.5--RELATIVE VARIATION OF V
BO
VERSUS JUNCTION
TEMPERATURE(TYPICAL VALUES)
FIG.6--PEAK PULSEE CURRENT VERENT VERSUS
PULSE DURATION(MAXIMUM VALUES)
I
TRM
(A)
1.08
VBO(TJ)
VBO(TJ=25
)
2
1.06
T
J
(
)
1
f=100Hz
TJ initial=25℃
1.04
0.1
tp(
µ
s)
1.02
1.00
25
50
75
100
125
0.01
10
100
1000
10000
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Document Number 0283003
BL
GALAXY ELECTRICAL
2.
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