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| PartNumber | 0603SFS450F/32-2 | 0603SFS400FM/32-2 | 0603SFS400F/32-2 |
| Description | Surface Mount Fuses Fast Acting 4.5A | Surface Mount Fuses 4A 32V 0603 Slow-Blow Chp Fuse | Surface Mount Fuses Fast Acting 4A |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse |
| Product Category | Surface Mount Fuses | Surface Mount Fuses | Surface Mount Fuses |
| RoHS | Y | Y | Y |
| Series | 0603SFS | 0603SFS | 0603SFS |
| Product | Surface Mount Fuse | Surface Mount Ceramic Fuse | Surface Mount Fuse |
| Fuse Type | Time Delay / Slow Blow | Time Delay / Slow Blow | Time Delay / Slow Blow |
| Current Rating | 4.5 A | 4 A | 4 A |
| Voltage Rating DC | 32 VDC | 32 VDC | 32 VDC |
| Fuse Size / Group | 0603 (1608 metric) | 0603 (1608 metric) | 0603 (1608 metric) |
| Packaging | Reel | Reel | Reel |
| Height | 0.8 mm | 0.95 mm | 0.8 mm |
| Length | 1.6 mm | 1.75 mm | 1.6 mm |
| Width | 0.8 mm | 0.95 mm | 0.8 mm |
| Brand | Littelfuse | Littelfuse | Littelfuse |
| Product Type | SMD Fuses | SMD Fuses | SMD Fuses |
| Factory Pack Quantity | 4000 | 4000 | 4000 |
| Subcategory | Fuses | Fuses | Fuses |
| Part # Aliases | RF0349-000 | RF0348-000 | RF0347-000 |
| Interrupt Rating | - | 50 A at 32 V | - |
| Minimum Operating Temperature | - | - 55 C | - |
| Maximum Operating Temperature | - | + 125 C | - |
| Resistance | - | 17 mOhms | - |