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IRFU7746PBF-VB Product details
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IRFU7746PBF-VB is a Single N-MOS deeply optimized for medium-voltage high-current power switching scenarios. The Trench process combines ultra-low on-resistance with fast switching characteristics, and the TO251 package achieves a good balance between heat dissipation capability and installation convenience. The combination of 80V withstand voltage, 75A continuous current carrying capacity, and 6.4mΩ on-resistance makes it a reliable choice for communication power supplies, motor drives, and lithium battery protection applications, especially suitable for systems with high requirements for power density and thermal performance.
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Product parameter：
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds2.5 | Rds4.5 | Rds10 | Technology |
|---|---|---|---|---|---|---|---|---|---|
| TO251 | Single-N | 80V | 3V | 75A | 8.7(mΩ) | 6.4(mΩ) | Trench |
| VB Package | Configuration | VCE | VGE | VGEth(V) | VCEsat15V | ICE | Technology |
|---|---|---|---|---|---|---|---|
| TO251 | Single-N | Trench |
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds18 | Technology |
|---|---|---|---|---|---|---|---|
| TO251 | Single-N | 80V | 3V | 75A | Trench |
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds6 | Technology |
|---|---|---|---|---|---|---|---|
| TO251 | Single-N | 80V | 3V | 75A | Trench |
| VB Package | Polarity | Vz / VR | Pd | VF | IF | IR | Cd | Type |
|---|---|---|---|---|---|---|---|---|
| TO251 | Single-N |
VDS=80V: Suitable for 24V/36V/48V systems, provides ample voltage spike margin, significantly reduces avalanche breakdown risk, improves system robustness.
VGS=±20V: Compatible with 5V~12V drive voltages, can flexibly work with gate drive ICs or MCU logic outputs, simplifies drive circuit design.
Vth=3V (typical): Moderate threshold voltage ensures both noise immunity and stable entry into full conduction region in high-current applications, suitable for multi-level drive topologies.
RDS(on)=6.4mΩ @ VGS=10V: Ultra-low on-resistance, minimal full-load conduction loss, effectively reduces temperature rise, can reduce or eliminate external heatsinks.
ID=75A: Strong continuous current capability, can handle startup surges and sustained heavy loads of high-power applications with ample margin.
Package TO251: Through-hole package, low thermal resistance, robust soldering, suitable for industrial and automotive applications requiring good heat dissipation and less sensitive to PCB area.
Domain and module applications：
High-Power DC-DC Converter: As a synchronous rectifier or main switch, ultra-low on-resistance significantly improves conversion efficiency, with the advantage being particularly prominent under heavy load.
Motor Drive and Controller: 80V voltage withstand and 75A high current capability match the drive requirements of DC brushed motors, power tools, and small drone motors, with low PWM switching losses.
Lithium Battery Protection Board: High voltage withstand and high current carrying capacity ensure the charge/discharge safety of multi-cell battery packs; low internal resistance reduces self-heating of the protection board, extending battery life.
Communication Base Station Power Supply: Wide voltage margin and excellent thermal characteristics adapt to 48V bus systems, meeting long-term high-reliability operation requirements.
Automotive Auxiliary Power Supply and DC-DC: Voltage rating covers 12V/24V/48V automotive buses; wide operating temperature range adapts to harsh environments like engine compartments.
Electric Forklift and AGV Drive: High current carrying capacity and low-loss characteristics ensure smooth output under heavy load conditions, improving system endurance and reliability.
UPS and Inverter: Leverages low-loss advantages in high-side or low-side power stages, contributing to overall system efficiency improvement and heatsink miniaturization. Selection Summary: The IRFU7746PBF-VB, with its core advantages of 80V withstand voltage, 75A high current, and 6.4mΩ ultra-low on-resistance, combined with the high-reliability thermal characteristics of the TO251 package, is a cost-effective choice for medium-voltage, high-power switching applications. It is particularly suitable for industrial and automotive projects with strict requirements for overcurrent capability, heat dissipation, and long-term reliability.
* 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
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