| Part Number | 250R145U | 250R145TU |
|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. |
| Category | PTC Resettable Fuses | PTC Resettable Fuses |
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| Product Status | Obsolete | Obsolete |
| Type | Polymeric | Polymeric |
| Voltage - Max | 60V (250V Int) | 60V (250V Int) |
| Current - Max | 3 A | 3 A |
| Current - Hold (Ih) (Max) | 145 mA | 145 mA |
| Current - Trip (It) | 290 mA | 290 mA |
| Time to Trip | 2.5 s | 2.5 s |
| Resistance - Initial (Ri) (Min) | 3 Ohms | 5.4 Ohms |
| Resistance - Post Trip (R1) (Max) | 14 Ohms | 14 Ohms |
| Resistance - 25°C (Typ) | - | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Ratings | - | - |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | Radial, Disc | Radial, Disc |
| Size / Dimension | 0.256" L x 0.181" W (6.50mm x 4.60mm) | 0.256" L x 0.181" W (6.50mm x 4.60mm) |
| Height - Seated (Max) | 0.433" (11.00mm) | 0.433" (11.00mm) |
| Thickness (Max) | - | - |
| Lead Spacing | 0.201" (5.10mm) | 0.201" (5.10mm) |