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MMBT3904-AQ is listed in the Single Bipolar Transistors range at ChipApex. The manufacturer field lists Diotec Semiconductor. Its product description is TRANS NPN 40V 0.2A SOT23-3. Review the specifications below when checking this part for your BOM.
The MMBT3904-AQ is a surface-mount general-purpose NPN bipolar junction transistor manufactured by Diotec Semiconductor. It operates within a collector-emitter voltage of 40 V and supports a maximum DC collector current of 200 mA. The device dissipates up to 350 mW of power and features a DC current gain ranging from 100 to 300. It utilizes an SOT-23 (TO-236) package with a junction temperature range of -55°C to +150°C. The component meets AEC-Q101 qualification standards for automotive applications.
Verify the specific marking code '1E' on the component body to confirm the MMBT3904-AQ variant. Ensure the procurement specification explicitly requires AEC-Q101 qualification, as standard commercial versions carry different suffixes. Confirm that the application environment aligns with the specified operating temperature range and power dissipation limits provided in the datasheet.
Select this component when an NPN transistor with AEC-Q101 automotive qualification is required in a compact SOT-23 footprint. It serves as a direct alternative to other general-purpose NPN transistors where automotive-grade reliability is mandated. Consider the complementary MMBT3906/-AQ PNP transistor for matched pairs in push-pull configurations.
This part belongs to the MMBT-BJT series of small-signal transistors produced by Diotec Semiconductor. It represents the automotive-qualified version of the widely used MMBT3904 general-purpose NPN transistor. The product line includes both standard commercial grades and specialized automotive grades designed for higher reliability requirements.
The recommended complementary PNP transistor is the MMBT3906/-AQ.
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