| PartNumber | FQA40N25 | FQA44N08 | FQA44N10 |
| Description | MOSFET 250V N-Channel QFET | MOSFET 80V N-Channel QFET | MOSFET 100V N-Channel QFET |
| Manufacturer | ON Semiconductor | ON Semiconductor | ON Semiconductor |
| Product Category | MOSFET | MOSFET | MOSFET |
| RoHS | Y | Y | Y |
| Technology | Si | Si | Si |
| Mounting Style | Through Hole | Through Hole | Through Hole |
| Package / Case | TO-3PN-3 | TO-3PN-3 | TO-3PN-3 |
| Number of Channels | 1 Channel | 1 Channel | 1 Channel |
| Transistor Polarity | N-Channel | N-Channel | N-Channel |
| Vds Drain Source Breakdown Voltage | 250 V | 80 V | 100 V |
| Id Continuous Drain Current | 40 A | 49.8 A | 48 A |
| Rds On Drain Source Resistance | 70 mOhms | 34 mOhms | 39 mOhms |
| Vgs Gate Source Voltage | 30 V | 25 V | 25 V |
| Minimum Operating Temperature | - 55 C | - 55 C | - 55 C |
| Maximum Operating Temperature | + 150 C | + 175 C | + 175 C |
| Pd Power Dissipation | 280 W | 163 W | 180 W |
| Configuration | Single | Single | Single |
| Channel Mode | Enhancement | Enhancement | Enhancement |
| Tradename | QFET | - | - |
| Packaging | Tube | Tube | Tube |
| Height | 20.1 mm | 20.1 mm | 20.1 mm |
| Length | 16.2 mm | 16.2 mm | 16.2 mm |
| Series | FQA40N25 | - | - |
| Transistor Type | 1 N-Channel | 1 N-Channel | 1 N-Channel |
| Type | MOSFET | - | MOSFET |
| Width | 5 mm | 5 mm | 5 mm |
| Brand | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild |
| Fall Time | 165 ns | 75 ns | 100 ns |
| Product Type | MOSFET | MOSFET | MOSFET |
| Rise Time | 580 ns | 170 ns | 190 ns |
| Factory Pack Quantity | 450 | 30 | 450 |
| Subcategory | MOSFETs | MOSFETs | MOSFETs |
| Typical Turn Off Delay Time | 120 ns | 40 ns | 90 ns |
| Typical Turn On Delay Time | 70 ns | 15 ns | 19 ns |
| Part # Aliases | FQA40N25_NL | - | - |
| Unit Weight | 0.225789 oz | 0.000194 oz | 0.000198 oz |
| Forward Transconductance Min | - | - | 31 S |