BC848A

Overview

The Diotec Semiconductor BC848A is a small-signal NPN bipolar junction transistor (BJT) designed for surface-mount applications. It features a maximum collector-emitter voltage of 30 V and a continuous DC collector current of 100 mA, with a peak collector current capability of 200 mA. The device dissipates up to 250 mW of power in industrial grades and operates within a temperature range of -55°C to +150°C. It offers three distinct DC current gain groups: Group A (110–220), Group B (180–450), and Group C (270–800). The component utilizes an SOT-23 or TO-236AB package.

Feature Summary

• Provides three selectable DC current gain groups (A, B, and C) for precise circuit matching
• Compliant with RoHS directives without exemptions and adheres to REACH regulations
• Features gold bond wires across all standard grades for reliable interconnects
• Available in automotive-grade variants compliant with AEC-Q101 standards

Applications

• General-purpose signal processing circuits
• Electronic switching applications
• Linear amplification stages

Procurement Notes

Verify the specific ordering suffix to confirm the intended grade and compliance level. The absence of a suffix indicates Industrial grade, while the -C suffix denotes Commercial grade. Automotive applications require verification of the -Q or -AQ suffixes for AEC-Q101 compliance. Confirm that the selected variant matches the required thermal resistance and power dissipation limits for the target PCB layout.

Selection Notes

Select the appropriate current gain group based on the required amplification factor; Group A provides lower gain while Group C offers higher gain. Ensure the operating voltage does not exceed the 30 V collector-emitter limit. For high-reliability environments, consider the AEC-Q101 qualified versions. Verify that the thermal management strategy accommodates the specified power dissipation and thermal resistance values under expected ambient conditions.

Part Context

The BC848A belongs to the BC846 through BC850 series of universal NPN transistors manufactured by Diotec Semiconductor. This family shares common mechanical dimensions and pin configurations but varies in voltage ratings and gain characteristics. The BC848A specifically targets applications requiring lower voltage handling compared to the BC846/BC847 counterparts, making it suitable for low-voltage logic interfacing and general-purpose electronics.

Replacement Considerations

Direct functional substitutes include the BC848B and BC848C from the same manufacturer, which share identical voltage and current ratings but offer different gain ranges. Cross-manufacturer equivalents such as the 2N3904 may be considered if package adaptation is feasible, though pinout compatibility must be verified.