2N3904BK

Single Bipolar Transistors Overview

The Diotec Semiconductor 2N3904BK is a general-purpose NPN bipolar junction transistor (BJT) designed for commercial and industrial applications. It features a maximum collector-emitter voltage of 40 V, a continuous collector current of 200 mA, and a total power dissipation of 625 mW at 25°C. The device operates within a junction temperature range of -55°C to +150°C and utilizes a TO-92 package with a lead pitch of 1.27 mm. Key electrical characteristics include a DC current gain (hFE) ranging from 40 to 300 depending on the operating current, a transition frequency of 300 MHz, and low saturation voltages.

Single Bipolar Transistors Feature Summary

• General-purpose NPN transistor suitable for signal processing, switching, and amplification tasks
• Compliant with RoHS, REACH regulations, and conflict minerals standards
• Designed for standard commercial and industrial grade reliability requirements

Single Bipolar Transistors Applications

• Signal processing circuits
• Electronic switching applications
• Amplification stages

Single Bipolar Transistors Procurement Notes

Verify that the specific ordering suffix 'BK' corresponds to bulk packaging with a 1.27 mm lead pitch as documented in the official datasheet. Confirm compliance with RoHS and REACH requirements during procurement. Ensure the component meets standard commercial/industrial grade specifications rather than automotive grades, which require distinct suffixes such as '-Q' or '-AQ'.

Single Bipolar Transistors Selection Notes

Select this component for standard commercial and industrial applications requiring an NPN transistor with a 40V breakdown voltage and 200mA current capacity. Consider the thermal resistance of 200 K/W when designing for ambient temperatures above 25°C, as power dissipation decreases by 5mW per degree Celsius increase. Verify that the required lead pitch matches the 1.27 mm specification associated with the bulk packaging variant.

Single Bipolar Transistors Part Context

The 2N3904BK belongs to the 2N3904 family of universal NPN transistors manufactured by Diotec Semiconductor. This series is widely utilized in electronic designs for basic switching and amplification functions. The 'BK' suffix specifically denotes the bulk packaging configuration with a 1.27 mm lead spacing, distinguishing it from taped ammo-pack versions.

Single Bipolar Transistors Replacement Considerations

Diotec recommends the 2N3906 PNP transistor as the complementary counterpart for this device.