Overview
The BU508AFI is a high-voltage NPN power transistor manufactured by STMicroelectronics. It is designed using advanced diffused collector technology in planar structure, enhancing its performance for high-voltage applications. This transistor is particularly suited for use in horizontal deflection stages of standard definition CRT (Cathode Ray Tube) displays and other high-voltage switching applications. The BU508AFI offers stable performance over a wide range of operating temperatures and features low base-drive requirements, making it a reliable choice for demanding applications.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Collector-emitter voltage (VBE = 0) | VCES | 1500 | V |
| Collector-emitter voltage (IB = 0) | VCEO | 700 | V |
| Collector-base voltage (IC = 0) | VEBO | 9 | V |
| Collector current | IC | 8 | A |
| Collector peak current (tP < 5ms) | ICM | 15 | A |
| Base current | IB | 4 | A |
| Total dissipation at Tc = 25°C | PTOT | 50 | W |
| Insulation withstand voltage (RMS) from all three leads to external heatsink | Vins | 2500 | V |
| Storage temperature | Tstg | -65 to 150 | °C |
| Max. operating junction temperature | TJ | 150 | °C |
| Thermal resistance junction-case | Rthj-case | 2.5 | °C/W |
Key Features
- State-of-the-art technology using diffused collector in planar structure.
- Stable performances versus operating temperature variation.
- Low base-drive requirement.
- Tight hFE range at operating collector current.
- High ruggedness.
- Fully insulated power package, U.L. compliant.
- ECOPACK® packages with Lead-free second level interconnect.
Applications
- Horizontal deflection output for CRT TV.
- Switch mode power supplies for CRT TV.
Q & A
- What is the maximum collector-emitter voltage of the BU508AFI transistor?
The maximum collector-emitter voltage (VCEO) is 700 V.
- What is the maximum collector current of the BU508AFI transistor?
The maximum collector current (IC) is 8 A.
- What is the thermal resistance junction-case of the BU508AFI transistor?
The thermal resistance junction-case (Rthj-case) is 2.5 °C/W.
- What are the typical applications of the BU508AFI transistor?
The BU508AFI is typically used in horizontal deflection output for CRT TV and switch mode power supplies for CRT TV.
- Is the BU508AFI transistor still in production?
No, the BU508AFI is no longer manufactured.
- What is the maximum operating junction temperature of the BU508AFI transistor?
The maximum operating junction temperature (TJ) is 150 °C.
- What is the insulation withstand voltage of the BU508AFI transistor?
The insulation withstand voltage (Vins) is 2500 V RMS from all three leads to the external heatsink.
- What technology is used in the manufacturing of the BU508AFI transistor?
The BU508AFI is manufactured using diffused collector technology in planar structure.
- Is the BU508AFI transistor compliant with any specific standards?
Yes, it is fully insulated and U.L. compliant.
- What is the storage temperature range for the BU508AFI transistor?
The storage temperature range is -65 to 150 °C.
