BC817K-40R

Overview

The Nexperia BC817K-40R is an NPN general-purpose transistor housed in a SOT23 (TO-236AB) surface-mount package. It features a collector-emitter voltage of 45 V and a continuous collector current of 500 mA, with a peak pulse current capability of 1 A. The device offers a DC current gain range of 250 to 600 at VCE = 1 V and IC = 100 mA. It supports a junction temperature up to 150 °C and has been qualified according to the AEC-Q101 automotive standard.

Feature Summary

• Three distinct current gain selections available for design flexibility
• High power dissipation capability suitable for various thermal environments
• Qualified according to the AEC-Q101 automotive reliability standard

Applications

• General-purpose switching circuits
• Amplification applications
• Automotive electronics systems

Procurement Notes

Verify that the ordering suffix matches the required packaging format, as it dictates reel specifications rather than electrical function. Confirm the specific gain bin corresponds to the circuit requirements. Ensure compliance with RoHS directives and check for any regional export control classifications before finalizing procurement orders.

Selection Notes

Select this component when high current handling and precise gain control are necessary. The BC817K-40 variant provides a minimum hFE of 250, distinguishing it from lower-gain series members. Consider the SOT23 footprint constraints and verify thermal resistance values against the expected PCB copper area and ambient operating conditions.

Part Context

This part belongs to the BC817K series, which includes complementary PNP transistors such as the BC807K-40. The 'K' designation indicates a shrinked chip version within the product family. The series is designed to offer robust performance across a wide temperature range while maintaining compatibility with standard surface-mount assembly processes.

Replacement Considerations

Direct substitutes include other manufacturers' equivalents meeting the same SOT23 form factor and 45V/500mA ratings. Verify pinout compatibility and ensure the replacement part meets or exceeds the AEC-Q101 qualification if used in automotive contexts.