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| PartNumber | SI4408DY-T1-E3 | SI4408DY-T1-GE3 | SI4408DY |
| Description | MOSFET RECOMMENDED ALT 781-SI4114DY-E3 | MOSFET 20V 21A 3.5W 4.5mohm @ 10V | MOSFET 20V 21A 3.5W |
| Manufacturer | Vishay | Vishay | - |
| Product Category | MOSFET | MOSFET | - |
| RoHS | E | E | - |
| Technology | Si | Si | - |
| Tradename | TrenchFET | TrenchFET | - |
| Packaging | Reel | Reel | - |
| Series | SI4 | SI4 | - |
| Brand | Vishay / Siliconix | Vishay / Siliconix | - |
| Product Type | MOSFET | MOSFET | - |
| Factory Pack Quantity | 2500 | 2500 | - |
| Subcategory | MOSFETs | MOSFETs | - |
| Part # Aliases | SI4408DY-E3 | SI4408DY-GE3 | - |
| Unit Weight | 0.017870 oz | 0.017870 oz | - |
| Mounting Style | - | SMD/SMT | - |
| Package / Case | - | SO-8 | - |
| Height | - | 1.75 mm | - |
| Length | - | 4.9 mm | - |
| Width | - | 3.9 mm | - |