IDB31
PLANAR SILICON BIDIRECTIONAL TRIGGER DIODE
FEATURES
Intend for use in triac and thyristors circuits
V
BO
: 30V to 34V
Excellent Breakover Voltage
Symmetry: typ. 1%
Low Breakover Current: 20A typ.
Marking: B31
Bidirectional Operation:
Pin 2 and 3 connected to the circuit
Pin 1 has to stay open
IMPORTANT
Do not connect Pin 1 to ground, VCC or any signal lines.
Pin 1 has to be soldered at a solderpad without any further
lines
MECHANICAL DATA
Case: SOT-23 Plastic Package
Weight: approx. 0.008g
Marking code: B31
MAXIMUM RATINGS
In accordance with the Absolut Maximum Rating System (IEC 134).
SYMBOL
VALUE
UNIT
Power dissipation
P
tot
150
(NOTE 1)
mW
Repetitive peak on-state current
tp=20s, f=100Hz
I
TRM
2
Amps
Operating junction temperature range
at tp < 1 s, T
amb
= 25 C
T
J
-40 to +125
C
Storage temperature range
T
S
-40 to +125
C
Thermal resistance junction to ambient air
R
thA
400
(NOTE 1)
C/W
NOTES:
(1) Device on fiberglass substrate, see layout in Fig. 4
.016 (0.4)
.056 (
1
.43
)
.037(0.95) .037(0.95)
ma
x
.
.004
(
0.1
)
.122 (3.1)
.016 (0.4)
.016 (0.4)
1
2
3
Top View
.102 (2.6)
.007 (
0
.17
5)
.0
45 (
1
.15)
.118 (3.0)
.052 (
1
.33
)
.005
(
0
.1
25)
.094 (2.4)
.0
37 (
0
.95)
SOT-23
Dimensions in inches and (millimeters)
1/15/99
1
2
3
Top View
NEW PRODUCT NEW PRODUCT NEW PRODUCT
ELECTRICAL CHARACTERISTICS
at Tj = 25 C, unless otherwise specified; electrical characteristics applicable in both, forward and reverse direction
SYMBOL
MIN.
TYP.
MAX.
UNIT
Breakover Voltage
see Fig. 1
V
BO
30
32
34
Volts
Breakover Voltage Symmetry
see Fig. 1
V
BO1
-V
BO2
-
-
2
Volts
Dynamic Breakback Voltage
(I
BO
to I
F
=10mA), see Fig. 1
DV
5
8
-
Volts
Output Voltage
see Fig. 2
V
O
5
-
-
Volts
Breakover Current
see Fig. 1
I
BO
4
20
50
mA
Rise time
see Fig. 3
t
r
-
100
-
ns
Leakage current
V
B
=0,5
V
BO
max.
I
B
-
-
0.5
mA
see Fig. 1
10mA
I
BO
-I
F
+I
F
I
B
V
BO
V
BO1
V
BO2
+V
-V
DV
0.5
FIG. 1 - CURRENT-VOLTAGE CHARACTERISTICS
RATINGS AND CHARACTERISTIC CURVES IDB31
0.59 (15)
0.2 (5)
0.03 (0.8)
0.30 (7.5)
0.12 (3)
.04 (1)
0.06 (1.5)
0.20 (5.1)
.08 (2)
.08 (2)
.04 (1)
0.47 (12)
FIG. 4 - Layout for Rth test
Dimensions in mm
Thickness:
Fiberglass 1.5mm
Cu leads 0.3mm
IDB31
10k
220V
50H
500k
R=20
0.1
mF
I
P
z
V
O
90%
10%
I
P
I
r
200
100
0
150
50
0
100
200
T
amb
(
C
)
P
tot
(
mW
)
FIG. 2 - TEST CIRCUIT
FIG. 3 - TEST CIRCUIT SEE FIG. 1
ADJUST R FOR I
P
=0.5A
FIG. 5 - ADMISSIBLE POWER DISSIPATION VERSUS
AMBIENT TEMPERATURE
30
26
28
0
T
a
V
BO
FIG. 6 - RELATIVE VARIATION OF V
BO
vs. T
j
27
29
31
32
33
34
25C
50C
75C
100C
125C
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