IXFN44N80
800 V / 44 A IXYS HiPerFET N-channel power MOSFET in SOT-227B for high-voltage supplies and DC-DC.
The IXFN44N80 is an 800 V / 44 A IXYS N-channel enhancement-mode power MOSFET from the HiPerFET family, in the isolated SOT-227B package. The 800 V class provides margin for converters that run from a 380 to 480 V AC line or a high-voltage DC bus, and the 44 A rating covers switch-mode power supplies, inverters, motor drives and high-voltage DC-DC conversion. The HiPerFET process combines a rugged, avalanche-rated body diode with fast switching and low on-resistance, and the isolated SOT-227B package mounts with screws on a common heatsink without an extra insulating layer, which simplifies the mechanical design and improves heat transfer. A power MOSFET turns on with a simple voltage drive, so the gate circuit is straightforward, and the fast body diode freewheels cleanly in a bridge. Every device is factory-traceable and ships with import declaration, certificate of origin and RoHS documentation. Designers should confirm the gate drive, the switching speed and the thermal path. Availability is confirmed per project; BeiLuo reserves supply against your forecast.
FAE Professional Review
The IXFN44N80 brings the HiPerFET ruggedness to an 800 V class, which suits supplies and inverters that run from a 400 V line. The isolated SOT-227B package keeps multi-device heatsinking simple, and the fast body diode handles freewheeling well. As always, check the hot on-resistance for cooling.
| Parameter | Value |
|---|---|
| VDSS (V) | 800 V |
| ID (A) | 44 A |
| Package | SOT-227B |
| Series | HiPerFET |
| Type | N-channel enhancement |
Application Circuits
High-voltage supplies
Reference circuits and application schematics for High-voltage supplies are available from our FAE team.
Inverters
Reference circuits and application schematics for Inverters are available from our FAE team.
High-voltage DC-DC
Reference circuits and application schematics for High-voltage DC-DC are available from our FAE team.
Need a reference schematic or design review? Our FAE engineers can share verified circuits and layout guidance for this part.
Related Documents
Alternative Part Numbers
Complementary Part Numbers
| Model | Package | Note | Action |
|---|---|---|---|
| IXGH38N60 | TO-247AD | IGBT for the main power stage | View |
| DSEI60-06A | TO-247AD | Fast recovery diode for the freewheeling path | View |
Recommended Complementary Products
Frequently Asked Questions
What projects suit the IXFN44N80?
It fits 800 V converters that run from a 380 to 480 V AC line or a high-voltage DC bus, such as switch-mode supplies, inverters and high-voltage DC-DC. The 44 A rating and isolated package suit these classes well.
For a lower bus, the IXFN44N50 is more economical.
How do I control overshoot at 800 V?
At 800 V the margin matters, so keep the switching loop tight and tune the gate resistor to limit dv/dt and overshoot. Measure turn-off overshoot at the device terminals, not at the bus.
Our FAE team can review your layout.
Is lead time longer for this part?
Stock status for the IXFN44N80 is confirmed per request, and some ratings are scheduled against forecast. BeiLuo sources through IXYS's authorized channel and reserves supply against your plan.
Share your volume for current lead time.