BC337-40,412

Single Bipolar Transistors Overview

The BC337-40,412 is an NPN general-purpose transistor manufactured by Nexperia (formerly NXP Standard Products). It operates with a collector-emitter voltage of 45 V and a continuous DC collector current of 500 mA. The device features a peak collector current capability of 1 A and total power dissipation of 625 mW at 25 °C ambient temperature. The -40 suffix indicates a DC current gain (hFE) range of 250 to 600 when measured at IC = 100 mA and VCE = 1 V. It utilizes the SOT54 (TO-92) plastic single-ended leaded package.

Single Bipolar Transistors Feature Summary

• High current handling capability for switching applications
• Low voltage operation suitable for general-purpose circuits
• Defined DC current gain selection groups for precise amplification control

Single Bipolar Transistors Applications

• General-purpose switching
• Audio frequency (AF) amplification
• Driver transistor stages

Single Bipolar Transistors Procurement Notes

Verify that the component originates from Nexperia B.V., as the former NXP Standard Product business was transferred in February 2017. Confirm the specific ordering code matches the required hFE binning (-40) and packaging variant (bulk straight leads for 412 suffix). Ensure datasheet references are updated to reflect the current manufacturer identity.

Single Bipolar Transistors Selection Notes

Select this component when a high-gain NPN transistor is required for low-voltage signal processing or switching tasks. The -40 selection group provides a minimum hFE of 250, ensuring strong drive capability compared to lower gain variants. Verify thermal constraints relative to the FR4 printed-circuit board mounting conditions specified in the limiting values section.

Single Bipolar Transistors Part Context

This part belongs to the BC817/BC337 family of NPN silicon epitaxial planar transistors. It serves as the through-hole equivalent to surface-mounted variants like the BC817 (SOT23) and BC817W (SOT323). The family shares identical electrical characteristics but differs in physical package dimensions and pin configurations.

Single Bipolar Transistors Replacement Considerations

Direct functional substitutes within the same family include BC337-16 and BC337-25, provided their respective hFE ranges align with circuit requirements. Surface-mount replacements such as BC817-40 require adaptation to the SOT23 footprint.