BUL59

Single Bipolar Transistors Overview

The BUL59 is an NPN high-voltage fast-switching power transistor manufactured by STMicroelectronics using planar technology with an epitaxial collector. It features a collector-emitter voltage (VCEO) of 400 V and a collector-base voltage (VCBO) of 850 V. The device supports a maximum continuous collector current of 8 A and has a power dissipation rating of 90 W in a TO-220-3 through-hole package. Operating temperatures range from -65 °C to +150 °C, with a collector-emitter saturation voltage of 1.5 V.

Single Bipolar Transistors Feature Summary

• High voltage capability with enhanced ruggedness for reliable operation under stress
• Very high switching speed enabled by planar technology and epitaxial collector structure

Single Bipolar Transistors Applications

• High voltage power switching circuits
• Fast-switching applications requiring high ruggedness

Single Bipolar Transistors Procurement Notes

Verify component status as the BUL59 is listed as obsolete. Confirm availability through authorized distributors or secondary markets. Check RoHS compliance details and ensure the TO-220-3 package matches design requirements. Validate datasheet revisions before integration into new designs due to end-of-life status.

Single Bipolar Transistors Selection Notes

Select this component for applications requiring high breakdown voltage up to 850 V and fast switching characteristics. Ensure thermal management supports 90 W dissipation in a TO-220-3 package. Consider the single NPN configuration and 8 A current limit when designing load circuits. Verify compatibility with existing PCB footprints for through-hole mounting.

Single Bipolar Transistors Part Context

The BUL59 belongs to the family of bipolar junction transistors (BJTs) produced by STMicroelectronics. It utilizes silicon technology and is designed for power electronics applications. The device is part of a broader portfolio of high-voltage transistors, though specific model comparisons are not detailed in the provided documentation.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitute part numbers are not available in the source data. Consult official STMicroelectronics resources for potential obsolescence alternatives.