DB3 [FORMOSA]
DIAC; DIAC
FORMOSA MS 
Formosa MS
DB3
DIAC
Features
1. VBO: 32V
2. Breakover voltage range: 28 to 36V
Applications
Functioning as a trigger diode with a fixed voltage
reference, the DB3 can be used in conjunction
with triacs for simplified gate control circuits or as
a starting element in fluorescent lamp ballasts.
Absolute Maximum Ratings
(Limiting values)
Parameter
Symbol
ITRM
Value
Unit
A
Repetitive peak on-state current (tp=20µ s F=120 Hz)
Operating junction temperature range
Storage temperature range
2
T
j
-40 ~ +125
-40 ~ +125
?
Tstg
?
Formosa MS
1
Formosa MS
DB3
Electrical Characteristics
(T=25? unless otherwise specified)
j
Parameter
Symbol
Test Conditions
Value
Unit
V
Breakover voltage*
VBO
C=22nF**
C=22nF**
MIN.
TYP.
MAX.
28
32
36
Breakover voltage symmetry
Dynamic breakover voltage*
Output voltage*
|VBO1-VBO2
|
MAX.
MIN.
± 3
5
V
V
? V
VO
IBO
tr
VBO and VF at 10mA
see diagram 2(R=20O )
C=22nF**
MIN.
5
V
Breakover current*
Rise time*
MAX.
MAX.
MAX.
50
2
µ A
µ s
µ A
see diagram 3
Leakage current*
IR
VR=0.5VBO max
10
*Applicable to both forward and reverse directions.
**Connected in parallel to the device.
Formosa MS
2
Formosa MS
DB3
Formosa MS
3
Formosa MS
DB3
Dimensions in mm
Standard Glass Case
JEDEC DO 35
Formosa MS
4
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