BC817-40W,135

Overview

The Nexperia BC817-40W,135 is an NPN general-purpose transistor housed in a SOT-323 (SC-70) surface-mount package. It supports a maximum collector-emitter voltage of 45 V and a continuous collector current of 500 mA. The device features a DC current gain range of 250 to 600 at IC = 100 mA and VCE = 1 V. Peak collector current reaches 1 A for single pulses up to 1 ms. Total power dissipation is rated at 200 mW at Tamb ≤ 25 °C, with a junction temperature limit of 150 °C.

Feature Summary

• High current capability suitable for demanding switching applications
• Three distinct current gain selections available within the series
• Compact plastic surface-mounted design for space-constrained layouts

Applications

• General-purpose switching circuits
• Signal amplification stages
• Driver circuits for low-power loads

Procurement Notes

Verify that the specific order matches the non-automotive qualified product designation found in the Rev. 8 datasheet. Confirm the SOT-323 package variant aligns with PCB footprint requirements. Ensure application conditions remain within the specified absolute maximum ratings to prevent permanent damage or reliability degradation during operation.

Selection Notes

Select this component when a compact NPN transistor with high current handling is required. The -40 suffix indicates a specific DC current gain binning range compared to other series variants. Verify thermal management needs against the 200 mW dissipation limit. Consider the complementary BC807-40W for push-pull configurations requiring matched characteristics.

Part Context

This part belongs to the BC817W series of NPN general-purpose transistors manufactured by Nexperia. The series includes variants with different gain ranges, such as BC817-16W and BC817-25W. All share the same SOT-323 package form factor and electrical limits, differing primarily in their hFE classification for consistent circuit performance across production batches.

Replacement Considerations

Direct functional substitutes include BC817-40W from other manufacturers adhering to identical SOT-323 pinouts and electrical specifications. For automotive applications, verify if an AEC-Q101 qualified alternative is required, as this specific revision is designated for non-automotive use.