BCX70H

Overview

The BCX70H is an NPN epitaxial silicon transistor manufactured by ON Semiconductor, formerly Fairchild. It operates with a collector-emitter voltage of 45 V and a collector current rating of 200 mA. The device dissipates up to 350 mW of power and features a current gain bandwidth product of 125 MHz. Packaged in the SOT-23 surface-mount format, it supports a storage temperature range from -55 °C to 150 °C.

Feature Summary

• NPN epitaxial silicon construction for general-purpose amplification
• SOT-23 surface-mount package design
• High collector current capability of 200 mA

Applications

• General-purpose amplification circuits
• Switching applications requiring moderate current handling

Procurement Notes

Verify the exact part number against the official ON Semiconductor database due to historical naming changes following the Fairchild integration. Confirm that the datasheet revision matches the specific manufacturing lot requirements. Ensure compliance with RoHS directives if applicable to the target market. Validate pinout configurations against the SOT-23 standard before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a compact NPN transistor with a 45 V collector-emitter breakdown voltage. The 200 mA continuous collector current rating makes it suitable for driving small loads or acting as a buffer stage. Consider the 350 mW power dissipation limit when designing thermal management strategies for enclosed environments.

Part Context

This component belongs to the general-purpose transistor category within the ON Semiconductor portfolio. Originally developed under the Fairchild Semiconductor brand, it remains available through ON Semiconductor's distribution channels. The device serves as a standard discrete semiconductor solution for basic electronic circuit implementations.

Replacement Considerations

Consult the official ON Semiconductor documentation for verified substitute part numbers. Cross-reference specifications such as voltage ratings and current gains to ensure functional compatibility during replacement scenarios.