BC857BSH-QX

Overview

The BCM857BSH-QX is a PNP/PNP matched double transistor manufactured by Nexperia, housed in an SOT363-3 (SC-88) surface-mount package. It features a maximum collector-emitter voltage of 45 V and a continuous collector current of 100 mA. Key electrical parameters include a collector-base voltage of 50 V, an emitter-base voltage of 7 V, and a power dissipation of 400 mW. The device offers a minimum DC current gain (hFE) of 200 and a transition frequency (fT) of 100 MHz. It operates within a temperature range of -55 °C to +175 °C and holds AEC-Q101 qualification for automotive reliability.

Feature Summary

• AEC-Q101 qualified for automotive applications with extended high-temperature operation up to 175 °C
• Matched dual transistors providing low collector capacitance and low collector-emitter saturation voltage
• Current gain and base-emitter voltage matching ensures minimal mutual interference between the two transistors

Applications

• Current mirror circuits
• Differential amplifier configurations
• High-temperature general-purpose switching

Procurement Notes

Verify the specific suffix 'QX' against the manufacturer's official documentation to confirm reel quantity and tape specifications. Ensure the component meets AEC-Q101 requirements if intended for automotive use. Cross-reference the part number with the latest datasheet revision to confirm pinout compatibility and thermal characteristics before finalizing procurement orders.

Selection Notes

Select this component when a matched pair of PNP transistors is required in a compact SOT363 footprint. It serves as a drop-in replacement for standard double transistors where space reduction is critical. Consider its 175 °C operating limit for environments exceeding standard industrial temperatures. Verify that the 100 mA current rating and 400 mW power dissipation align with the circuit's load requirements.

Part Context

This part belongs to Nexperia's BCM857 series of small-signal bipolar junction transistors. It is the automotive-grade variant of the BC857BS, distinguished by its AEC-Q101 qualification and enhanced thermal performance. The SOT363 package allows for significant board space savings compared to discrete single transistors, making it suitable for dense consumer and automotive electronics designs.

Replacement Considerations

BCM857BSH-Q is the non-reel version of this component. BCM857BS is the standard commercial grade equivalent without automotive qualification.