Overview
The BUL741 is a high voltage, fast-switching NPN power transistor manufactured by STMicroelectronics. It is designed using high voltage multi-epitaxial planar technology, which enables high switching speeds and high voltage capability. This transistor is particularly robust, featuring an increased intermediate layer that enhances its intrinsic ruggedness and allows it to withstand high collector current levels during breakdown conditions without the need for additional protection.
Key Specifications
| Symbol | Parameter | Value | Unit |
|---|---|---|---|
| VCES | Collector-emitter voltage (VBE = 0) | 1050 | V |
| VCEO | Collector-emitter voltage (IB = 0) | 400 | V |
| VEBO | Emitter-base voltage (IC = 0, IB = 2 A, tP < 10ms) | 15 - 24 | V |
| IC | Collector current | 2.5 | A |
| ICM | Collector peak current (tP < 5 ms) | 5 | A |
| IB | Base current | 1.5 | A |
| IBM | Base peak current (tP < 5ms) | 3 | A |
| Ptot | Total dissipation at Tc = 25 °C for TO-220 | 60 | W |
| Ptot | Total dissipation at Tc = 25 °C for TO-220FP | 30 | W |
| Tstg | Storage temperature | -65 to 150 | °C |
| TJ | Max. operating junction temperature | 150 | °C |
| RthJC | Thermal resistance junction-case max | 2.08 (TO-220), 4.17 (TO-220FP) | °C/W |
Key Features
- High voltage capability up to 1050 V (VCES) and 400 V (VCEO)
- Low spread of dynamic parameters for reliable operation
- Very high switching speed
- Intrinsic ruggedness to withstand high collector current levels during breakdown conditions
- Available in TO-220 and TO-220FP packages
- ECOPACK® compliant for environmental sustainability
Applications
- Electronic ballast for fluorescent lighting
- Switch mode power supplies
Q & A
- What is the maximum collector-emitter voltage of the BUL741 transistor?
The maximum collector-emitter voltage (VCEO) is 400 V.
- What is the maximum collector current of the BUL741 transistor?
The maximum collector current (IC) is 2.5 A.
- What are the typical applications of the BUL741 transistor?
The BUL741 is typically used in electronic ballast for fluorescent lighting and switch mode power supplies.
- What is the thermal resistance junction-case for the TO-220 package?
The thermal resistance junction-case (RthJC) for the TO-220 package is 2.08 °C/W.
- What is the maximum operating junction temperature of the BUL741 transistor?
The maximum operating junction temperature (TJ) is 150 °C.
- Is the BUL741 transistor available in different packages?
Yes, it is available in TO-220 and TO-220FP packages.
- What is the collector-emitter saturation voltage of the BUL741 transistor?
The collector-emitter saturation voltage (VCE(sat)) is up to 1.5 V at IC = 2 A and IB = 0.6 A.
- Does the BUL741 transistor have any special environmental compliance?
Yes, it is available in ECOPACK® compliant packages for environmental sustainability.
- What is the storage temperature range for the BUL741 transistor?
The storage temperature range is -65 to 150 °C.
- What is the base-emitter saturation voltage of the BUL741 transistor?
The base-emitter saturation voltage (VBE(sat)) is up to 1.5 V at IC = 2 A and IB = 0.6 A.
