BULD741-1

Single Bipolar Transistors Overview

The BULD741-1 is a high-voltage NPN power bipolar junction transistor manufactured by STMicroelectronics using Multi-Epitaxial Planar technology. It features a DPAK-3 (TO-252-3) surface-mount package and operates with a maximum collector-emitter voltage of 400 V and a continuous collector current of 2.5 A. The device dissipates up to 30 W of power and maintains a DC current gain minimum of 48. It functions within a temperature range of -65°C to +150°C.

Single Bipolar Transistors Feature Summary

• High voltage capability enabled by multi-epitaxial planar technology
• Intrinsic ruggedness allowing withstand of high collector current during breakdown without external transil protection
• Very high switching speed for efficient operation
• Minimum lot-to-lot spread ensuring reliable dynamic parameter consistency

Single Bipolar Transistors Applications

• Converters for lamp ballast
• High voltage switching circuits
• Power supply applications requiring fast switching

Single Bipolar Transistors Procurement Notes

Verify the specific suffix '-1' against official STMicroelectronics documentation, as standard variants like BUL741 or BULD741T4 may exist. Confirm availability status, as this component is listed as discontinued in some distributor records. Ensure the DPAK-3 package matches your PCB footprint requirements before finalizing procurement decisions.

Single Bipolar Transistors Selection Notes

Select this component when designing circuits requiring high voltage handling up to 400 V combined with fast switching characteristics. The intrinsic ruggedness eliminates the need for additional transient suppression components in certain topologies. Consider the thermal management requirements associated with the TO-252-3 package for power dissipation levels up to 30 W.

Single Bipolar Transistors Part Context

This part belongs to the BUL series of high-voltage fast-switching NPN power transistors from STMicroelectronics. The series utilizes multi-epitaxial planar technology to achieve high voltage ratings and switching speeds. Related parts include the BUL741 and BULD741T4, which share similar technological foundations but may differ in packaging or specific electrical tolerances.

Single Bipolar Transistors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing designs if considering alternative high-voltage NPN transistors from other manufacturers.