Overview
The BUL743 is a high voltage fast-switching NPN power transistor manufactured by STMicroelectronics. This device is designed using the diffused collector in planar technology with an enhanced high voltage structure, providing intrinsic ruggedness and the ability to withstand high collector current levels during breakdown conditions. The BUL743 is particularly suited for applications requiring high voltage capability and fast switching speeds.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector-emitter voltage (VBE = 0) | 1200 | V |
| Collector-emitter voltage (IB = 0) | 500 | V |
| Emitter-base breakdown voltage | 15 - 24 | V |
| Collector current | 12 | A |
| Collector peak current (tp < 5 ms) | 24 | A |
| Base current | 6 | A |
| Base peak current (tp < 5 ms) | 12 | A |
| Total dissipation at Tc = 25 °C | 100 | W |
| Max. operating junction temperature | 150 | °C |
| Storage temperature | -65 to 150 | °C |
| Thermal resistance junction - case | 1.25 | °C/W |
| Thermal resistance junction - ambient | 62.5 | °C/W |
Key Features
- Low spread of dynamic parameters for reliable operation.
- High voltage capability up to 1200 V.
- Very high switching speed.
- Intrinsic ruggedness to withstand high collector current levels during breakdown conditions.
- Minimum lot-to-lot spread for consistent performance.
Applications
- Electronic ballast for fluorescent lighting up to 256 W (8 x 32 W).
- Switch mode power supplies.
Q & A
- What is the maximum collector-emitter voltage of the BUL743? The maximum collector-emitter voltage (VBE = 0) is 1200 V.
- What is the maximum collector current of the BUL743? The maximum collector current is 12 A.
- What is the maximum operating junction temperature of the BUL743? The maximum operating junction temperature is 150 °C.
- What are the typical applications of the BUL743? The BUL743 is typically used in electronic ballast for fluorescent lighting and switch mode power supplies.
- What is the thermal resistance junction - case of the BUL743? The thermal resistance junction - case is 1.25 °C/W.
- What is the package type of the BUL743? The BUL743 is packaged in a TO-220 tube.
- What is the emitter-base breakdown voltage of the BUL743? The emitter-base breakdown voltage ranges from 15 to 24 V.
- What is the total dissipation at Tc = 25 °C for the BUL743? The total dissipation at Tc = 25 °C is 100 W.
- What are the key features of the BUL743? Key features include low spread of dynamic parameters, high voltage capability, very high switching speed, and intrinsic ruggedness.
- What is the storage temperature range for the BUL743? The storage temperature range is -65 to 150 °C.
