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The BUK9Y27-40B,115 is an N-channel TrenchMOS logic level enhancement mode Field-Effect Transistor (FET) manufactured by Nexperia. It utilizes TrenchMOS technology and is designed for automotive critical applications in compliance with AEC-Q101 standards. The device features a plastic LFPAK (SOT669) package with four leads. Key electrical parameters include a drain-source voltage of 40 V, a continuous drain current of 34 A at 25 °C mounting base temperature, and a total power dissipation of 59.4 W. The on-state resistance ranges from 18 mΩ to 27 mΩ depending on gate drive conditions.
Verify the specific ordering suffix
Select this component when designing circuits requiring robust N-channel switching with low on-resistance in compact packages. Ensure the gate drive voltage aligns with the logic level specifications to optimize RDS(on). Consider the thermal management requirements given the 175 °C junction temperature limit and the specific thermal resistance values provided in the datasheet for accurate heat sinking calculations.
This part belongs to the Nexperia BUK9Y series of N-channel TrenchMOS logic level FETs. These devices are engineered using advanced trench technology to provide high performance in small surface-mount packages. The series is specifically targeted at automotive and industrial applications where reliability under harsh conditions and efficient power switching are critical design factors.
Check pinout compatibility and electrical parameter margins against existing designs. Verify that any substitute maintains the SOT669 package dimensions and meets or exceeds the 40 V breakdown voltage and 34 A current ratings specified for the original component.