BC817W,135

Overview

The BC817-40W,135 is an NPN general-purpose transistor from the Nexperia BC817W series, housed in a compact SOT323 (SC-70) surface-mount package. It supports a collector-emitter voltage of 45 V and a continuous collector current of 500 mA, with peak currents reaching 1 A. The device offers a DC current gain range of 250 to 600 at 100 mA. Key electrical characteristics include a transition frequency of 100 MHz and a maximum power dissipation of 200 mW at 25 °C ambient temperature.

Feature Summary

• High current capability for demanding switching applications
• Three distinct current gain selections for precise circuit design
• Very small footprint suitable for space-constrained designs

Applications

• General-purpose switching circuits
• Signal amplification stages
• Space-restricted electronic assemblies

Procurement Notes

Verify the specific suffix '135' corresponds to the required tape-and-reel packaging configuration before ordering. Confirm that the non-automotive qualification status aligns with your application requirements, as this component lacks automotive certification. Ensure compatibility with standard SOT323 footprints during PCB layout.

Selection Notes

Select the BC817-40W variant when a high DC current gain between 250 and 600 is required at 100 mA. This selection group differs from the -16W and -25W variants which offer lower gain ranges. Consider the SOT323 package dimensions if board real estate is limited compared to larger packages like SOT23.

Part Context

This component belongs to the BC817W series, which includes complementary PNP devices such as the BC807-40W. The series provides standardized NPN transistors in the SOT323 package, offering a smaller alternative to the traditional SOT23 form factor while maintaining similar electrical performance profiles for general-purpose use.

Replacement Considerations

Direct pin-compatible substitutes within the same series include BC817-16W,135 and BC817-25W,135, though these feature different DC current gain ranges. For identical gain specifications, ensure the replacement part number explicitly matches the '-40W' designation.