DB3, DB4, SMDB3 DIAC Diodes
ST Microelectronics 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 and Benefits
- 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
The DIAC, or ‘diode for alternating current’, is a diode that conducts current only after its breakover voltage has been reached momentarily.
Datasheet
Specifications
| Attribute | Value |
| Maximum Breakover Current | 0.05mA |
| Maximum Breakover Voltage | 36V |
| Repetitive Peak On-State Current | 2A |
| Repetitive Peak Off-State Current | 0.01mA |
| Mounting Type | Through Hole |
| Package Type | DO-35 |
| Pin Count | 2 |
| Dimensions | 4.5 x 2 x 2mm |
| Length | 4.5mm |
| Width | 2mm |
| Maximum Operating Temperature | 125 °C |
| Height | 2mm |
| Minimum Operating Temperature | -40 °C |
