| Part Number | RGEF500-2 | RGEF900-2 | 
|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. | 
| Category | PTC Resettable Fuses | PTC Resettable Fuses | 
|   |   | |
| Product Status | Active | Active | 
| Type | Polymeric | Polymeric | 
| Voltage - Max | 16V | 16V | 
| Current - Max | 100 A | 100 A | 
| Current - Hold (Ih) (Max) | 5 A | 9 A | 
| Current - Trip (It) | 8.5 A | 15.3 A | 
| Time to Trip | 2 s | 5.5 s | 
| Resistance - Initial (Ri) (Min) | 15 mOhms | 4.7 mOhms | 
| Resistance - Post Trip (R1) (Max) | 34 mOhms | 13.5 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 | 0.390" L x 0.098" W (9.90mm x 2.50mm) | 0.532" L x 0.100" W (13.50mm x 2.50mm) | 
| Height - Seated (Max) | 0.563" (14.30mm) | 0.854" (21.70mm) | 
| Thickness (Max) | - | - | 
| Lead Spacing | 0.199" (5.05mm) | 0.199" (5.05mm) |