DB3, DB4, SMDB3
Datasheet Diac Features DO-35 2 • VBO : 32 V and 40 V •
• Low breakover current
Breakover voltage symmetry : 3V • ECOPACK®2 compliant Applications 3
1
SOT-23 Pin 1 and 3 must be shorted
together •
•
• Triggering device for Triac or SCR based motor / light dimmer
32 V trigger device for oscillator circuit
Start up triggering in lighting ballast for CFL, TL or LED lamps Description
Functioning as a trigger diode with a fixed voltage reference, the DB3/DB4 series can
be used in conjunction with triacs for simplified gate control circuits or as a starting
element in fluorescent lamp ballasts.
The surface mount SOT23-3L package allows compact, SMD based designs for
automated manufacturing. Product status link
DB3
DB4
SMDB3
Product summary
Part number VBO SMDB3 28 -36 V DB3 28 -36 V DB4 35 -45 V DS2125 -Rev 3 -December 2018
For further information contact your local STMicroelectronics sales office. www.st.com DB3, DB4, SMDB3
Characteristics 1 Characteristics
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