Overview
The SMDB3 is a surface mount DIAC (Diode for Alternating Current) manufactured by STMicroelectronics. It functions as a trigger diode with a fixed voltage reference, making it suitable for use in conjunction with triacs for simplified gate control circuits. The device is packaged in a compact SOT23-3L package, facilitating automated manufacturing and space-efficient designs.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Breakover Voltage (VBO) | VBO | 28 - 36 V | V |
| Breakover Voltage Symmetry | ΔVBO | 3 V | V |
| Breakover Current (IBO) | IBO | 50 µA | µA |
| Repetitive Peak On-State Current (ITRM) | ITRM | 1 A | A |
| Operating Junction Temperature Range | Tj | -40 to +125 °C | °C |
| Storage Junction Temperature Range | Tstg | -40 to +125 °C | °C |
| Rise Time (tr) | tr | 0.5 µs | µs |
| Leakage Current (IR) | IR | 1 µA | µA |
Key Features
- Fixed breakover voltage: 28 - 36 V
- Low breakover current: 50 µA
- Breakover voltage symmetry: 3 V
- Compact SOT23-3L surface mount package
- ECOPACK®2 compliant for environmental sustainability
- Low rise time: 0.5 µs
Applications
- Triggering device for triac or SCR-based motor and light dimmer circuits
- Trigger device for oscillator circuits
- Start-up triggering in lighting ballasts for CFL, TL, or LED lamps
Q & A
- What is the SMDB3 used for? The SMDB3 is used as a trigger diode in conjunction with triacs for simplified gate control circuits and in various lighting ballast applications.
- What is the breakover voltage range of the SMDB3? The breakover voltage range of the SMDB3 is 28 - 36 V.
- What package type is the SMDB3 available in? The SMDB3 is available in a SOT23-3L surface mount package.
- Is the SMDB3 environmentally compliant? Yes, the SMDB3 is ECOPACK®2 compliant.
- What is the maximum repetitive peak on-state current for the SMDB3? The maximum repetitive peak on-state current for the SMDB3 is 1 A.
- What are the operating and storage temperature ranges for the SMDB3? Both the operating and storage junction temperature ranges are -40 to +125 °C.
- What is the rise time of the SMDB3? The rise time of the SMDB3 is 0.5 µs.
- What is the leakage current of the SMDB3? The leakage current of the SMDB3 is 1 µA.
- Can the SMDB3 be used in oscillator circuits? Yes, the SMDB3 can be used as a trigger device in oscillator circuits.
- Is the SMDB3 suitable for automated manufacturing? Yes, the SMDB3 in the SOT23-3L package is suitable for automated manufacturing.
