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| PartNumber | ASMD250F-2 | ASMD250-2 | ASMD250F |
| Description | Resettable Fuses - PPTC 1.97A 16V SMD AEC-Q200 | Resettable Fuses - PPTC | |
| Manufacturer | Littelfuse | - | - |
| Product Category | Resettable Fuses - PPTC | - | - |
| RoHS | Y | - | - |
| Series | ASMD | - | - |
| Mounting Style | SMD/SMT | - | - |
| Termination Style | SMD/SMT | - | - |
| Hold Current | 1.97 A | - | - |
| Maximum Voltage | 16 V | - | - |
| Trip Current | 5 A | - | - |
| Current Rating Max | 40 A | - | - |
| Resistance | 85 mOhms | - | - |
| Package / Case | 3425 (8763 metric) | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Qualification | AEC-Q200 | - | - |
| Packaging | Reel | - | - |
| Height | 3 mm | - | - |
| Length | 9.4 mm | - | - |
| Type | AEC-Q200 | - | - |
| Width | 6.71 mm | - | - |
| Brand | Littelfuse | - | - |
| Moisture Sensitive | Yes | - | - |
| Pd Power Dissipation | 1.2 W | - | - |
| Product Type | Resettable Fuses - PPTC | - | - |
| Factory Pack Quantity | 1500 | - | - |
| Subcategory | PPTC Resettable Fuses | - | - |
| Tradename | PolySwitch | - | - |
| Part # Aliases | RF1639-000 | - | - |