KSB1151YS

Single Bipolar Transistors Overview

The KSB1151YS is a PNP epitaxial silicon bipolar junction transistor manufactured by Fairchild Semiconductor, now part of onsemi. It features a collector-emitter breakdown voltage (VCEO) of 60 V and a maximum collector current (IC) of 5 A. The device is housed in a TO-126 through-hole package with three terminals. Key electrical specifications include an emitter-base voltage (VEBO) of 7 V, a collector-base voltage (VCBO) of 60 V, and a power dissipation (Pd) rating of 1.3 W at 25°C. The collector-emitter saturation voltage is specified at 140 mV under defined conditions.

Single Bipolar Transistors Feature Summary

• High collector current capability for robust switching applications
• Low collector-emitter saturation voltage to minimize power loss
• Epitaxial silicon construction for reliable performance

Single Bipolar Transistors Applications

• General-purpose switching circuits
• Power management systems
• Industrial control logic

Single Bipolar Transistors Procurement Notes

Verify the manufacturer status carefully, as Fairchild Semiconductor was acquired by onsemi. Confirm that the specific suffix 'YS' corresponds to the intended packaging or tape-and-reel configuration if required. Check for obsolescence notices, as some sources indicate this component may be discontinued or not in active production. Ensure compatibility with existing PCB footprints for the TO-126 package before finalizing procurement decisions.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with a 60 V rating and 5 A continuous current capacity is required. The low saturation voltage makes it suitable for applications where minimizing voltage drop across the switch is critical. Consider the thermal requirements of the TO-126 package, as the 1.3 W power dissipation limit dictates heat sinking needs for high-load scenarios. Verify that the 7 V emitter-base reverse voltage rating meets the circuit's transient protection requirements.

Single Bipolar Transistors Part Context

The KSB1151 series belongs to the family of discrete power transistors designed for medium-power switching applications. This specific variant, KSB1151YS, represents the PNP polarity version within the broader product line. The transition from Fairchild Semiconductor to onsemi has impacted availability and documentation hosting, requiring careful verification of datasheet versions. The TO-126 package provides a balance between power handling and mounting simplicity for through-hole implementations.

Single Bipolar Transistors Replacement Considerations

Publicly confirmed substitute part numbers include KSB1151YSTSSTU and KSB1151YSTSTU. These variants share identical electrical characteristics and physical dimensions, differing primarily in packaging or reel specifications. When replacing, ensure the substitute maintains the same PNP polarity, 60 V/5 A ratings, and TO-126 footprint to guarantee mechanical and electrical compatibility.