IC BUK7611 55A (often seen as BUK7611-55A) is not a logic IC or microcontroller — it’s a high-current power MOSFET transistor used for switching and power control in automotive and industrial circuits. Specifically:
🔋 What It Is
Type: N-channel enhancement-mode power MOSFET (TrenchMOS).
Manufacturer: Nexperia (originally part of NXP).
Package: D2PAK / SOT404 (TO-263-3) surface-mount package with two leads + tab.
Technology: MOSFET metal-oxide semiconductor suitable for power switching.
⚙️ Key Specs
Drain-Source Voltage (V<sub>DSS</sub>): 55 V max — safe for 12 V / 24 V systems.
Continuous Drain Current: ~75 A (thermal case).
R<sub>DS(on)</sub>: ~11 mΩ @ V<sub>GS</sub> = 10 V (low on-resistance means efficient switching).
Power Dissipation: ~166 W (case rating).
Operating Temp: −55 °C to +175 °C (automotive-grade).
Gate Threshold (V<sub>GS(th)</sub>): ~4 V.
Automotive Qualified: AEC-Q101 compliant.
🚗 Typical Use Cases
This FET is designed for power switching in automotive electronics, including:
Switching loads like motors, lamps, fans, solenoids
DC-DC converters and general high-current control
Automotive control modules (ECUs, power distribution)
thanks to its high current capacity and rugged automotive rating.
📍 Summary
BUK7611-55A is a high-current N-channel power MOSFET suited for switching heavy loads in automotive and industrial power circuits. It’s rated for ~55 V, 75 A, and operates reliably over a wide temperature range — not a logic IC but a power switching transistor.
If you want, I can help you interpret its pinout or suggest equivalent replacement parts based on your application.