| Part Number | RHEF450 | RHEF550 |
|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. |
| Category | PTC Resettable Fuses | PTC Resettable Fuses |
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|
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| Product Status | Active | Active |
| Type | Polymeric | Polymeric |
| Voltage - Max | 16V | 16V |
| Current - Max | 100 A | 100 A |
| Current - Hold (Ih) (Max) | 4.5 A | 5.5 A |
| Current - Trip (It) | 7.8 A | 10 A |
| Time to Trip | 3 s | 6 s |
| Resistance - Initial (Ri) (Min) | 22 mOhms | 15 mOhms |
| Resistance - Post Trip (R1) (Max) | 54 mOhms | 37 mOhms |
| Resistance - 25°C (Typ) | - | - |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Ratings | - | - |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | Radial, Disc | Radial, Disc |
| Size / Dimension | 0.409" L x 0.118" W (10.40mm x 3.00mm) | 0.441" Dia x 0.118" T (11.20mm x 3.00mm) |
| Height - Seated (Max) | 0.614" (15.60mm) | 0.744" (18.90mm) |
| Thickness (Max) | - | - |
| Lead Spacing | 0.199" (5.05mm) | 0.199" (5.05mm) |