BUK9J0R9-40H – A Super Junction MOSFET with Low On-State Resistance
A MOSFET known as a metal-oxide-semiconductor-field-effect transistor is a special type of field-effect transistor which has an insulated gate where in this case the voltage determines the conductivity of the device. Just like conventional transistors, they are also used for switching and amplifying signals.
MOSFETs are now more commonly used in digital and analog circuits than BJTs (bipolar junction transistors) mostly because of their power efficiency. MOSFET’s are power efficient because the output is controlled by an input voltage instead of an input current. Electronics today are gearing towards low-power usage and MOSFETs seems to offer that over the BJTs.
There are several types of MOSFETS, and Super-Junction MOSFETs is a type of power transistor that is becoming mainstream lately. They are well-suited for high-speed operation at lower to immediate power levels as compared to IGBTs or the SiC-MOSFETs as shown in the graph below.
After the first super-junction MOSFETs was introduced commercially by Siemens in Germany (1999), super-junction MOSFETs in recent years are becoming the leading representative of MOSFETs for high voltages.
Nexperia, a global leader in Discrete, Logic and MOSFETs devices have introduced an automotive-focused super-junction MOSFETs in an electrically and thermally efficient LFPAK56E package called the BUK9J0R9-40H.
The Nexperia LFPAK56 package provides a genuine alternative to DPAK and D2PAK solutions. It will allow a considerable amount of space to be saved as compared to traditional D2PAK and DPAK solutions and offers designers flexibility and reliability without compromising thermal performance.
The BUK9J0R9-40H features low RDS (on) of just 0.9 mΩ and can handle a maximum load current of 220 A at 40 V for applications switching up to 1.2 kW power, providing a cost and power efficient solution. The low RDS (on) and maximum current rating of 220 A of this newly launched MOSFETs seems to be the highest ever achieved in a power-S08 footprint device for use in the automotive sector.