| PartNumber | FFA40UP35STU | FFA40UP20DNTU |
| Description | Rectifiers 40A 350V Ultrafast | Diodes - General Purpose, Power, Switching FAST RECOVERY DIODE/600V 4A |
| Manufacturer | ON Semiconductor | ON Semiconductor |
| Product Category | Rectifiers | Diodes - General Purpose, Power, Switching |
| RoHS | Y | Y |
| Mounting Style | Through Hole | Through Hole |
| Package / Case | TO-3P | TO-3P |
| Vr Reverse Voltage | 350 V | 200 V |
| If Forward Current | 40 A | 20 A |
| Type | Fast Recovery Rectifiers | Switching Diode |
| Configuration | Single Dual Anode | Dual |
| Vf Forward Voltage | 1.6 V | 1.15 V |
| Max Surge Current | 300 A | 200 A |
| Ir Reverse Current | 100 uA | 100 uA |
| Recovery Time | 26 ns | 45 ns |
| Minimum Operating Temperature | - 65 C | - 65 C |
| Maximum Operating Temperature | + 175 C | + 150 C |
| Series | FFA40UP35S | - |
| Packaging | Tube | Tube |
| Height | 18.9 mm | 19.9 mm |
| Length | 15.8 mm | 15.6 mm |
| Product | Rectifiers | - |
| Width | 5 mm | 4.8 mm |
| Brand | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild |
| Pd Power Dissipation | - | - |
| Product Type | Rectifiers | Diodes - General Purpose, Power, Switching |
| Factory Pack Quantity | 450 | 30 |
| Subcategory | Diodes & Rectifiers | Diodes & Rectifiers |
| Unit Weight | 0.225789 oz | 0.238311 oz |
| Peak Reverse Voltage | - | 200 V |