CMXT3904 TR PBFREE

Overview

The CMXT3904 TR PBFREE is a surface mount dual NPN silicon transistor manufactured by Central Semiconductor Corp. It utilizes an epitaxial planar process and is housed in an SOT-26 package with six terminals. The device supports a continuous collector current of 200 mA per transistor and offers a collector-emitter voltage rating of 40 V. Maximum power dissipation is rated at 350 mW, with an operating junction temperature range spanning from -65 °C to +150 °C. Key electrical characteristics include a transition frequency (fT) of 300 MHz and a DC current gain (hFE) ranging from 40 to 300 under specified test conditions.

Feature Summary

• Dual NPN configuration within a single compact surface mount package
• Designed for small signal general purpose amplifier and switching applications
• Epitaxial planar silicon construction for reliable performance

Applications

• Small signal amplification circuits
• General purpose switching applications
• Low power electronic signal processing

Procurement Notes

Verify the specific ordering suffix when purchasing. The PBFREE designation indicates lead-free plating compliance. Confirm the manufacturer is Central Semiconductor Corp. Ensure the package type matches the required SOT-26 footprint for PCB layout compatibility. Check for RoHS certification status if environmental regulations apply to the final assembly.

Selection Notes

Select this component for designs requiring two matched NPN transistors in a minimal footprint. The 40 V collector-emitter voltage and 200 mA current capability suit low-power signal handling tasks. Consider the thermal resistance of 357 °C/W for heat dissipation planning. Verify that the hFE range meets the circuit's gain requirements across the intended operating temperature spectrum.

Part Context

This part belongs to the CMXT series of surface mount dual transistors from Central Semiconductor. It serves as a compact alternative to discrete single transistors where space is constrained. The dual configuration allows for differential pairs or push-pull stages within a single package, simplifying board layout compared to using separate components.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.