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FCU4300N80Z-VB Product details
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FCU4300N80Z-VB is a Single N-MOS deeply optimized for high-voltage power switching scenarios. Using SJ_Multi-EPI superjunction process, it achieves an excellent balance between breakdown voltage and conduction loss. The TO251 package balances heat dissipation capability with installation convenience, suitable for industrial power supplies, charger auxiliary power supplies, and high-voltage AC-DC converters. The combination of 800V withstand voltage, 2A current carrying capacity, and 2600mΩ on-resistance makes it an ideal choice for high-voltage low-side switches, startup circuits, and auxiliary power supplies, especially suitable for batch projects sensitive to reliability and cost.
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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 | 800V | 3.5V | 2A | 2600(mΩ) | SJ_Multi-EPI |
| VB Package | Configuration | VCE | VGE | VGEth(V) | VCEsat15V | ICE | Technology |
|---|---|---|---|---|---|---|---|
| TO251 | Single-N | SJ_Multi-EPI |
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds18 | Technology |
|---|---|---|---|---|---|---|---|
| TO251 | Single-N | 800V | 3.5V | 2A | SJ_Multi-EPI |
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds6 | Technology |
|---|---|---|---|---|---|---|---|
| TO251 | Single-N | 800V | 3.5V | 2A | SJ_Multi-EPI |
| VB Package | Polarity | Vz / VR | Pd | VF | IF | IR | Cd | Type |
|---|---|---|---|---|---|---|---|---|
| TO251 | Single-N |
VDS=800V: Covers three-phase rectification, PFC bus, and typical industrial bus voltages, provides voltage spike margin, reduces avalanche breakdown risk.
VGS=±30V: Large gate drive margin, compatible with various PWM controllers and driver ICs, simplifies gate protection circuit design.
Vth=3.5V (typical): Moderate threshold voltage, strong noise immunity, compatible with standard 10V drive, ensures reliable turn-on.
RDS(on)=2600mΩ @ VGS=10V: Achieves acceptable conduction loss with super junction technology, suitable for high-voltage low-current topologies, reduces switching stress.
ID=2A: Continuous current capability matches typical requirements of high-voltage auxiliary power supplies, startup resistors, and low-power loads.
Package TO251: Through-hole package facilitates heat dissipation, mature soldering process, suitable for high-voltage board-level layout, improves production yield.
Domain and module applications：
High-Voltage AC-DC Auxiliary Power Supply: Ample voltage margin, powers the control IC, reduces startup circuit losses, improves system startup reliability.
Switching Power Supply Startup Circuit: 2A peak capability allows rapid charging of the bus capacitor, supporting safe startup under high-voltage input.
PFC and LLC Auxiliary Power Supply: SJ_Multi-EPI technology provides excellent switching characteristics, reducing high-voltage stress and extending power supply lifespan.
Charging Station and Photovoltaic Inverter Control Board: Wide safe operating area adapts to harsh grid environments, providing stable bias power for DSP/MCU.
Industrial Inverter Switching Power Supply: 800V withstand voltage handles bus fluctuations; TO251 package is easy to install, improving overall production consistency.
LED Driver Power Supply High-Voltage Startup: Low leakage current design reduces standby power consumption, meeting energy efficiency certification requirements. Selection Summary: The FCU4300N80Z-VB achieves a balance between high-voltage withstand, drive compatibility, and package reliability. It is a cost-effective general-purpose choice for 800V high-voltage auxiliary switch applications, particularly suitable for industrial power supply projects with strict requirements for voltage margin and system stability.
* 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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