BCR146

Overview

The BCR146 is an NPN pre-biased digital transistor manufactured by Infineon Technologies, housed in a PG-SOT23-3-3 surface-mount package. It integrates internal base (R1) and emitter (R2) resistors with values of 47 kOhms and 22 kOhms respectively. The device supports a maximum collector-emitter voltage (Vceo) of 50 V and a continuous collector current (Ic) of 70 mA. Key electrical characteristics include a transition frequency (fT) of 150 MHz, a maximum power dissipation (Pd) of 200 mW, and a minimum DC current gain (hFE) of 50 at 5 mA and 5 V. It features a low saturation voltage of 300 mV at specific test conditions and is qualified to AEC-Q101 automotive standards.

Feature Summary

• Integrated biasing network eliminates external resistor requirements for simplified circuit design.
• Automotive-grade qualification ensures reliability under stringent environmental and operational conditions.
• Compact SOT-23-3 packaging facilitates high-density surface-mount assembly.

Applications

• Switching applications in automotive electronic control units.
• Driver circuits for low-current loads in industrial systems.
• Logic level translation interfaces in embedded systems.

Procurement Notes

Verify the complete ordering part number, including any suffix codes, against the official Infineon datasheet to ensure correct package and tape-and-reel specifications. Confirm RoHS compliance status and check for any specific handling instructions related to moisture sensitivity level 1. Ensure the supplier provides valid traceability documentation for automotive-grade components.

Selection Notes

Select this component when a compact NPN switch with integrated biasing is required for 50 V applications. The 150 MHz transition frequency suits moderate-speed switching tasks. Verify that the 70 mA collector current meets load requirements and that the 200 mW power dissipation rating aligns with thermal management capabilities in the target enclosure.

Part Context

The BCR146 belongs to Infineon's BCR series of pre-biased bipolar junction transistors. These devices combine single NPN transistors with built-in resistors to reduce board space and assembly time. The series is designed for general-purpose switching and logic interface applications, offering a standardized solution for replacing discrete transistor-resistor networks.

Replacement Considerations

The BCR142 is a comparable pre-biased NPN transistor within the same family. Note that the BCR142 has different internal resistor values (R1=22k, R2=47k) compared to the BCR146 (R1=47k, R2=22k). Direct pin-for-pin substitution requires verification of base drive requirements and switching thresholds to ensure functional equivalence in the specific circuit design.