Product introduction：
You are designing a high-power-density automotive power supply module or industrial drive board that must withstand up to 51A current surges while controlling temperature rise in a limited space. Ordinary MOSFETs either have high on-resistance, leading to severe heat generation, or are too large in package, wasting valuable PCB area. VBsemi BUK9Q45-80LJ-VB is designed for this purpose—it combines 80V voltage rating, 51A current capability, and only 9.5mΩ on-resistance in a compact DFN8(3X3) package, using advanced SGT technology, perfectly achieving high efficiency, high current, and small size in a single device.
File download
Product parameter：
| VB Package |
Configuration |
VDS(V) |
VGS |
Vthyp（V） |
ID(A) |
Rds2.5 |
Rds4.5 |
Rds10 |
Technology |
| DFN8(3X3) |
Single-N |
80V |
|
1.7V |
51A |
|
12.5(mΩ) |
9.5(mΩ) |
SGT |
| VB Package |
Configuration |
VCE |
VGE |
VGEth(V) |
VCEsat15V |
ICE |
Technology |
| DFN8(3X3) |
Single-N |
|
|
|
|
|
SGT |
| VB Package |
Configuration |
VDS(V) |
VGS |
Vthyp（V） |
ID(A) |
Rds18 |
Technology |
| DFN8(3X3) |
Single-N |
80V |
|
1.7V |
51A |
|
SGT |
| VB Package |
Configuration |
VDS(V) |
VGS |
Vthyp（V） |
ID(A) |
Rds6 |
Technology |
| DFN8(3X3) |
Single-N |
80V |
|
1.7V |
51A |
|
SGT |
| VB Package |
Polarity |
Vz / VR |
Pd |
VF |
IF |
IR |
Cd |
Type |
| DFN8(3X3) |
Single-N |
|
|
|
|
|
|
|
Voltage Rating 80V, covering 48V systems and automotive bus applications
Gate Drive Range ±20V, compatible with multiple logic level drives
Threshold Voltage 1.7V, reliable turn-on even with low-voltage control
On-Resistance 12.5mΩ (4.5V drive), 9.5mΩ (10V drive), extremely low losses
Maximum Current 51A, small package delivers high power
Technology Platform SGT (Shielded Gate Trench), better figure of merit, lower switching losses
Domain and module applications：
Automotive DC-DC Converters – As the main power switch, the combination of high voltage tolerance and low on-resistance significantly reduces losses, improving overall efficiency.
48V Mild Hybrid Systems / Power Tools – Withstands high current surges while maintaining low temperature rise, providing stable operation under heavy load conditions.
Server Power Supplies / Communication Power Supplies – Replaces traditional MOSFETs in synchronous rectification and power factor correction circuits, reducing conduction and switching losses.
Motor Drive Control Modules – Utilizes 51A high current capability and fast switching characteristics for precise PWM speed control and overcurrent protection.
Battery Formation / Charge-Discharge Equipment – Low voltage drop, high current path reduces energy loss, improving long-term operational reliability.
Industrial Power Supplies / Uninterruptible Power Supplies (UPS) – The compact DFN8(3X3) package combined with SGT technology enables high power density design and simplifies thermal management. One-sentence summary: The BUK9Q45-80LJ-VB is not an ordinary MOSFET; it is the "performance engine" and "space saver" for your high-power, high-efficiency power systems.
* Please note: the above is only an example application scenario, the specific application depends on the requirements and conditions of the system design. When using this device, consult its data sheet for detailed technical specifications and features
Technical support：
* If you have any questions about the product, please fill out the form to submit, we will reply you within 24 hours
Download now
中文
English
Back to previous page.png)
