2SB1121S-TD-E

Single Bipolar Transistors Overview

The onsemi 2SB1121S-TD-E is a PNP bipolar junction transistor (BJT) designed for general-purpose switching applications. It features a maximum collector-emitter voltage of -50 V and a continuous collector current rating of -3 A. The device utilizes the PCP surface-mount package, which corresponds to the SC-62 or SOT-89 form factor. Key electrical characteristics include a low collector-to-emitter saturation voltage and a transition frequency of 150 MHz. The component supports a maximum operating junction temperature of +150 °C and is manufactured using FBET and MBIT processes to ensure fast switching speeds and wide safe operating area capabilities.

Single Bipolar Transistors Feature Summary

• Low collector-to-emitter saturation voltage for efficient power handling
• Fast switching speed enabled by FBET and MBIT process technologies
• Wide Safe Operating Area (ASO) for robust performance under varying load conditions
• Large current capacity suitable for high-power switching tasks

Single Bipolar Transistors Applications

• Voltage regulators
• Relay drivers
• Lamp drivers
• General-purpose electrical equipment

Single Bipolar Transistors Procurement Notes

Verify the specific suffix 'TD-E' against the official onsemi datasheet to confirm tape-and-reel packaging and RoHS compliance status. Ensure the ordering number matches the current product nomenclature, as part numbers may have been updated following the Fairchild Semiconductor integration. Cross-reference the PCP package dimensions with your PCB footprint requirements before finalizing procurement.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with -50 V breakdown and -3 A current capability is required in a compact surface-mount package. The low VCE(sat) makes it suitable for applications where minimizing conduction losses is critical. Consider the 150 MHz transition frequency for medium-speed switching circuits. Verify that the thermal management solution can handle the specified power dissipation at the expected ambient temperatures.

Single Bipolar Transistors Part Context

The 2SB1121S-TD-E belongs to the 2SB112x series of PNP transistors from onsemi. This series is characterized by its adoption of advanced FBET and MBIT processes, which provide improved switching performance compared to standard bipolar transistors. The devices are commonly used in industrial and consumer electronics where reliable high-current switching is needed in a small footprint.

Single Bipolar Transistors Replacement Considerations

Publicly confirmed substitute part numbers for the 2SB1121S-TD-E were not found in the provided documentation. The 2SB1124S-TD-E shares similar electrical ratings (-50V, -3A) and package type but has different gain specifications; verify compatibility before substitution.