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The BUK7E04-40A,127 is an N-channel enhancement mode power MOSFET manufactured by Nexperia using TrenchMOS technology. It is housed in a SOT226 (I2-PAK) plastic package with a mounting base connected to the drain. The device features a drain-source voltage rating of 40 V and a continuous drain current capability of 198 A at a mounting base temperature of 25 °C. Total power dissipation reaches 300 W under the same conditions. The on-state resistance is specified as 4.5 mΩ maximum at 25 °C junction temperature, rising to 8.5 mΩ at 175 °C. The component supports a junction temperature range from -55 °C to +175 °C.
Verify component authenticity through authorized Nexperia channels or certified distributors. Confirm the specific ordering suffix matches the required package variant. Check for recent Product Change Notifications regarding manufacturing site updates or material composition changes. Ensure storage conditions comply with moisture sensitivity levels prior to soldering. Validate that the supplier provides traceable documentation for quality assurance purposes.
Select this component when designing circuits requiring high current handling capabilities within a 40 V system architecture. The SOT226 package offers a robust mechanical solution for heatsink mounting compared to surface-mount alternatives. Consider the thermal resistance characteristics when calculating heat dissipation requirements for the specific PCB footprint or chassis mounting strategy employed in the design.
This part belongs to the BUK75/76/7E series of TrenchMOS standard level FETs. While the BUK7504-40A utilizes the SOT78 (TO-220AB) package and the BUK7604-40A uses the SOT404 (D2-PAK), the BUK7E04-40A specifically employs the SOT226 (I2-PAK) form factor. All variants share identical electrical performance specifications derived from the same underlying silicon die technology.
Direct functional equivalents include the BUK7504-40A and BUK7604-40A. Substitution requires verifying that the physical package dimensions of the replacement part fit the existing board layout and mounting constraints. Electrical parameters remain consistent across these three part numbers within the same datasheet specification.
The mounting base is internally connected to the drain terminal.
Yes, the datasheet specifies it is repetitive avalanche rated.