DB3 thru DB4 - DC Components Co Ltd

DB3
DC COMPONENTS CO., LTD.
R
THRU
RECTIFIER SPECIALISTS
DB4
TECHNICAL SPECIFICATIONS OF BIDIRECTIONAL DIODE THYRISTORS (DIACS)
FEATURES
* Glass passivalted three-layer for triggering thyristors.
* Low breakover current at breakover voltage.
* For use in thyristor phase-control circuit for lampdimming,
universal-motor speed control and heat controls.
DO-35
MECHANICAL DATA
* Case: Glass sealed case
* Lead: MIL-STD-202E, Method 208 guaranteed
.020
(0.5)
1.0(25.4)
MIN.
* Mounting position: Any
* Weight: 0.15 gram
TYP.
.165(4.2)
MAX.
.079
(2.0)
MAX.
1.0(25.4)
MIN.
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25 o C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
Dimensions in inches and (millimeters)
PARAMETERS
SYMBOL
DB3
DB4
UNITS
28
35
Min
32
40
Typ
36
45
VOLT
Breakover Voltage
+VBO, -VBO
Max
VOLT
Breakover Voltage Symmetry
(+VBO)-(-VBO)
3
3
Max
VOLT
Dynamic Breakback Voltage
VBO - VBR
5
5
Min
Breakover Current
+IBO, -IBO
100
100
Max
IP
2.0
2.0
uA
Peak Pulse Current for
10uS, 120pps, TA<=40 o C
AMP
Max
RATING AND CHARACTERISTIC CURVES ( DB3 THRU DB4 )
FIG.1-V-I CHARACTERISTICS CURRENT
FIG.2-REPETITIVE PEAK ON-STATE
CURRENT VS PULSE DURATION
2.0
1.0
0.7
0.5
0.3
0.2
0.1
.07
.05
.03
.02
.01
.007
.005
.003
.002
.001
BREAKOVER
VOLTAGE
+5mA
+IBo
-VBo
VOLTAGE
-VBR
+VBR
-IBo
+VBo
-5mA
PULSE REPEAT ON RATE =120 PPS
Tz=400C
D28 32 35 40&50
D60
SAFE OPERATING
AREA
10
100
1000
10,000
FIG.4-TEST CIRCUIT WAVE FORMS
(SEE FIG.5)
FIG.3-NORMALIZED VBO CHANGE
VS JUNCTION TEMPERATURE
+8
+V(BO)
aV+
+6
D28
32
35
40
50
0
+4
D60
+2
t
aV-
-V(BO)
0
+IP
-2
-4
t
0
-6
-IP
-8
-40
-20
0
+20
+40
+60
+80 +100 +120 +140
FIG.5-CIRCUIT USED TO MEASURE
DIAC CHARACTERISTICS
RF
D.U.T.
Vc
120V
RMS
60Hz
200Ω
0.1u f
1%
*ADJUST FOR ONE FIRING IN HALF CYCLE
DC COMPONENTS CO., LTD.
R