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.

Features

• VBO : 32 V and 40 V
• Low breakover current
• Breakover voltage symmetry : 3V
• ECOPACK®2 compliant

Applications

• 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

Supplier link: https://datasheetspdf.com/pdf-file/193115/STMicroelectronics/DB3/1