BC858B-TP

Overview

The BC858B-TP is a PNP bipolar junction transistor manufactured by Micro Commercial Components. It features a maximum collector-emitter voltage of 30 V and a continuous collector current rating of 100 mA. The device has a maximum power dissipation of 200 mW and a transition frequency of 200 MHz. DC current gain (hFE) is specified at a minimum of 220 when tested at 2 mA collector current and 5 V collector-emitter voltage. The saturation voltage is limited to 650 mV under conditions of 5 mA base current and 100 mA collector current. Collector cutoff current is rated at a maximum of 15 nA. The component operates within a junction temperature range of -55°C to 150°C and is housed in an SOT-23 surface-mount package.

Feature Summary

• PNP signal transistor configuration for general-purpose switching and amplification
• High DC current gain ensuring efficient control with minimal base drive
• Robust thermal performance supporting operation up to 150°C junction temperature
• Compact SOT-23 surface-mount packaging for automated assembly

Applications

• General-purpose small signal amplification circuits
• Low-power switching applications in consumer electronics
• Driver stages for logic interfaces requiring PNP topology

Procurement Notes

Verify the specific datasheet version corresponding to the BC858B-TP part number before integration, as electrical characteristics may vary between manufacturing revisions. Confirm RoHS compliance status and moisture sensitivity level requirements against project specifications. Ensure the ordering suffix matches the required tape and reel or cut tape packaging format for production line compatibility.

Selection Notes

Select this component when a PNP transistor with moderate current handling and high gain is required in a compact footprint. The 30 V breakdown voltage suits low-voltage digital and analog systems. Compare hFE bins if precise gain matching is critical for the application. Consider the 200 mW power limit for thermal management in dense PCB layouts.

Part Context

This component belongs to the BC858 series of small-signal transistors produced by Micro Commercial Components. The BC858 family includes variants such as BC858A and BC858C, which differ primarily in their DC current gain ranges. The BC858B variant offers a specific gain bin suitable for standard amplification tasks. The TP suffix typically denotes the manufacturer's specific packaging or marking code.

Replacement Considerations

Cross-reference with other manufacturers' BC858B equivalents such as ON Semiconductor BC858BWT1G or NXP BC858BWT3. Verify pinout compatibility and ensure that the substitute part meets or exceeds the 30 V voltage rating and 100 mA current capability.