2SA2125-S-TD-E

Single Bipolar Transistors Overview

The onsemi 2SA2125-S-TD-E is a PNP bipolar junction transistor (BJT) designed for surface-mount applications. It features a collector-emitter voltage rating of 50 V and a maximum continuous collector current of 3 A. The device operates within a junction temperature range up to 150°C and dissipates a maximum power of 3.5 W. Key electrical characteristics include a DC current gain (hFE) of at least 200 at 100 mA with a 2 V collector-emitter voltage, and a transition frequency of 390 MHz. The saturation voltage is specified at a maximum of 500 mV under conditions of 100 mA base current and 2 A collector current.

Single Bipolar Transistors Feature Summary

• Low saturation voltage for efficient switching in power conversion circuits
• High current gain capability supporting robust drive requirements
• Optimized for high-frequency operation with defined transition frequency

Single Bipolar Transistors Applications

• DC-DC converter output stages
• Power management integrated circuit external transistors
• General-purpose switching applications requiring high current handling

Single Bipolar Transistors Procurement Notes

Verify the specific suffix 'S' against the manufacturer's official datasheet to confirm package variant and tape/reel specifications. Ensure the ordering part number matches the exact Pb-Free or Halogen-Free status required by your assembly process. Cross-reference the supplier's documentation with the original onsemi data sheet to validate the PCP package type and pinout configuration before finalizing procurement.

Single Bipolar Transistors Selection Notes

Select this component when designing circuits that require a single PNP transistor capable of handling up to 3 A with low saturation losses. Consider the 50 V breakdown voltage limit and the 3.5 W power dissipation capability relative to your thermal management strategy. Evaluate the hFE and transition frequency parameters to ensure compatibility with your control loop bandwidth and drive signal requirements.

Single Bipolar Transistors Part Context

This component belongs to the 2SA2125 series, which includes complementary NPN devices such as the 2SC5964. The series is specifically engineered for use in DC-DC converters, offering matched performance characteristics for push-pull or half-bridge configurations. The PCP package provides a compact footprint suitable for modern surface-mount technology assembly lines.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.