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| Part Number | RKEF250K | RKEF250 |
|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. |
| Product Status | Active | Active |
| Type | Polymeric | Polymeric |
| Voltage - Max | 60V | 60V |
| Current - Max | 40 A | 40 A |
| Current - Hold (Ih) (Max) | 2.5 A | 2.5 A |
| Current - Trip (It) | 5 A | 5 A |
| Time to Trip | 15.6 s | 15.6 s |
| Resistance - Initial (Ri) (Min) | 40 mOhms | 40 mOhms |
| Resistance - Post Trip (R1) (Max) | 140 mOhms | 140 mOhms |
| 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 | 0.551" L x 0.118" W (14.00mm x 3.00mm) | 0.512" L x 0.150" W (13.00mm x 3.81mm) |
| Height - Seated (Max) | 0.902" (22.90mm) | 0.740" (18.80mm) |
| Thickness (Max) | - | - |
| Lead Spacing | 0.199" (5.05mm) | 0.200" (5.08mm) |
