BCX41TA

Overview

The BCX41TA is a medium power NPN silicon transistor manufactured by Diodes Incorporated, housed in an SOT-23 surface-mount package. It provides a collector-emitter breakdown voltage (BVCEO) of 125 V and supports a continuous collector current (IC) of 800 mA. The device operates within a junction temperature range of -55°C to +150°C. Electrical characteristics include a transition frequency (ft) of 100 MHz at IC = 10 mA and VCE = 5 V. Thermal resistance from junction to ambient is specified as 403 °C/W on a minimum recommended pad layout.

Feature Summary

• High voltage capability with a 125 V collector-emitter breakdown rating suitable for demanding switching applications.
• Robust current handling with an 800 mA continuous collector current capacity in a compact SOT-23 footprint.
• Designed for high-frequency performance featuring a 100 MHz transition frequency.

Applications

• General-purpose medium power amplification
• Switching circuits requiring high voltage isolation
• Driver stages for loads up to 800 mA

Procurement Notes

Verify the specific ordering suffix 'TA' corresponds to the 3,000-unit reel packaging configuration when sourcing components. Confirm that the required RoHS compliance and halogen-free status align with project specifications. Ensure the selected supplier sources directly from authorized channels to guarantee authenticity and adherence to the manufacturer's standard terms and conditions.

Selection Notes

Select this component when a single NPN transistor must handle 125 V and 800 mA within a small SOT-23 form factor. Consider the thermal resistance of 403 °C/W for heat dissipation requirements in still air conditions. Evaluate the 100 MHz transition frequency against the target signal bandwidth to ensure adequate gain and response times for the intended circuit topology.

Part Context

This part belongs to the BCX41 series of medium power NPN transistors produced by Diodes Incorporated. The 'TA' suffix specifically denotes the tape-and-reel packaging format containing 3,000 units per carrier. The device utilizes a molded plastic SOT-23 package with matte tin-plated leads, designed for automated surface-mount assembly processes.

Replacement Considerations

Consult the official datasheet for the automotive-compliant variant BCX41Q if AEC-Q101 qualification is required. Verify pinout compatibility and electrical limits before substituting with other NPN transistors in the SOT-23 package.

FAQ

What is the maximum collector-emitter voltage for the BCX41TA?

The maximum collector-emitter breakdown voltage (BVCEO) is 125 V.

Is the BCX41TA compliant with RoHS directives?

Yes, the device is totally lead-free, fully RoHS compliant, and halogen and antimony free.

What is the operating temperature range of the transistor?

The operating and storage temperature range extends from -55°C to +150°C.