BC857C/DG/B4R

Overview

The Nexperia BC857C/DG/B4R is a PNP general-purpose bipolar junction transistor (BJT) designed for surface-mount applications. It operates with a maximum collector-emitter voltage of 45 V and a continuous collector current of 100 mA. The device utilizes the SOT-363 (SC-88) leadless ultra-small plastic package, measuring 1 mm in length and 0.5 mm in height. Key electrical characteristics include a DC current gain (hFE) range of 420 to 800 at IC = 2 mA and VCE = -5 V, ensuring high amplification capabilities. The component is qualified under AEC-Q101 standards for automotive reliability.

Feature Summary

• Ultra-small leadless SMD plastic package for minimal board space consumption
• High DC current gain suitable for low-level signal amplification
• AEC-Q101 qualified for automotive application reliability

Applications

• General-purpose small-signal switching and amplification
• Automotive electronic circuits requiring compact form factors
• Mobile device power management and signal processing

Procurement Notes

Verify the specific suffix code against official Nexperia documentation to confirm exact binning and packaging specifications. Ensure compatibility with automated pick-and-place equipment due to the leadless DFN-style footprint. Confirm RoHS compliance status through the manufacturer's latest datasheet before finalizing procurement orders.

Selection Notes

Select this component when design constraints demand the smallest possible footprint for PNP switching functions. The BC857C variant offers higher current gain than standard B-grade devices, making it ideal for sensitive analog stages. Verify thermal dissipation requirements as the small package limits power handling compared to larger SOT-23 alternatives.

Part Context

This part belongs to the BC857 series of PNP transistors from Nexperia, which includes variants like BC857A, BC857B, and BC857C differentiated primarily by hFE ranges. The DG/B4R suffix indicates specific manufacturing lot, tape & reel packaging, and regional distribution codes rather than functional differences within the same electrical specification family.

Replacement Considerations

Direct pin-compatible replacements include other BC857C variants in SOT-363 packages from different manufacturers, provided they meet the 45V VCEO and 100mA Ic ratings. Verify that substitute components maintain equivalent saturation voltages and transition frequencies for high-speed switching applications.