BC856B-HF

Overview

The BC856B-HF is a PNP bipolar junction transistor manufactured by Comchip Technology, designed for general-purpose switching and amplification applications. It utilizes silicon technology and is housed in an SOT-323 surface-mount package. Key electrical specifications include a collector-base voltage of 80 V, an emitter-base voltage of 5 V, and a continuous collector current of 100 mA. The device features a maximum power dissipation of 200 mW and operates within a temperature range of -65°C to +150°C. It offers a high DC current gain with a maximum hFE of 475 and a collector-emitter saturation voltage of 650 mV.

Feature Summary

• PNP polarity configuration suitable for low-side switching and signal amplification tasks
• Automotive-grade qualification ensuring reliability under varying environmental conditions
• High current gain capability supporting efficient control in amplifier circuits
• Compact SOT-323 footprint enabling dense PCB layout integration

Applications

• General-purpose switching circuits in automotive electronics
• Signal amplification stages requiring PNP topology
• Low-power analog circuit design
• Consumer electronic devices utilizing surface-mount assembly

Procurement Notes

Verify the manufacturer part number against official Comchip Technology documentation to ensure authenticity. Confirm RoHS compliance status through the provided datasheet or product compliance files. Check for specific ordering suffixes that may indicate packaging variations such as reel or cut tape formats. Ensure the component meets the required automotive grade specifications if used in vehicle systems. Cross-reference with authorized distributor catalogs for accurate stock availability and lead times.

Selection Notes

Select this component when a PNP transistor with 80 V breakdown voltage and 100 mA current capacity is required. The SOT-323 package is ideal for space-constrained designs. Consider the thermal performance given the 200 mW power dissipation limit. Verify that the operating temperature range covers the intended application environment. Compare hFE characteristics against circuit requirements to ensure adequate gain.

Part Context

This component belongs to the family of small-signal bipolar junction transistors. It serves as a fundamental active element in electronic circuits for amplification and switching. The BC856B variant typically denotes a specific binning of current gain within the broader BC856 series. Comchip Technology produces this device using standard silicon planar processes optimized for mass production and reliability.

Replacement Considerations

Direct substitutes include other PNP transistors in SOT-323 packages with similar voltage and current ratings, such as the BC856C or equivalent parts from other manufacturers like Nexperia or Diodes Inc. Ensure pinout compatibility and verify that replacement components meet the same automotive and RoHS standards.