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| Part Number | RUEF300K | RUEF500K | RUEF900K | RUEF400K | RUEF300U | RUEF600K | RUEF800K | RUEF700K | RUEF300 |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| Type | Polymeric | Polymeric | Polymeric | Polymeric | Polymeric | Polymeric | Polymeric | Polymeric | Polymeric |
| Voltage - Max | 30V | 30V | 30V | 30V | 30V | 30V | 30V | 30V | 30V |
| Current - Max | 100 A | 100 A | 100 A | 100 A | 100 A | 100 A | 100 A | 100 A | 100 A |
| Current - Hold (Ih) (Max) | 3 A | 5 A | 9 A | 4 A | 3 A | 6 A | 8 A | 7 A | 3 A |
| Current - Trip (It) | 6 A | 10 A | 18 A | 8 A | 6 A | 12 A | 16 A | 14 A | 6 A |
| Time to Trip | 10.8 s | 14.5 s | 20 s | 12.7 s | 10.8 s | 16 s | 18.8 s | 17.5 s | 10.8 s |
| Resistance - Initial (Ri) (Min) | 20 mOhms | 10 mOhms | 5 mOhms | 10 mOhms | 20 mOhms | 5 mOhms | 5 mOhms | 5 mOhms | 20 mOhms |
| Resistance - Post Trip (R1) (Max) | 80 mOhms | 50 mOhms | 20 mOhms | 50 mOhms | 80 mOhms | 40 mOhms | 20 mOhms | 30 mOhms | 80 mOhms |
| Resistance - 25°C (Typ) | - | - | - | - | - | - | - | - | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Ratings | - | - | - | - | - | - | - | - | - |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | Radial, Disc | Radial, Disc | Radial, Disc | Radial, Disc | Radial, Disc | Radial, Disc | Radial, Disc | Radial, Disc | Radial, Disc |
| Size / Dimension | 0.449" L x 0.118" W (11.40mm x 3.00mm) | 0.551" L x 0.118" W (14.00mm x 3.00mm) | 0.949" L x 0.118" W (24.10mm x 3.00mm) | 0.551" L x 0.118" W (14.00mm x 3.00mm) | 0.449" L x 0.118" W (11.40mm x 3.00mm) | 0.650" L x 0.118" W (16.50mm x 3.00mm) | 0.850" L x 0.118" W (21.60mm x 3.00mm) | 0.752" L x 0.118" W (19.10mm x 3.00mm) | 0.449" L x 0.118" W (11.40mm x 3.00mm) |
| Height - Seated (Max) | 0.710" (18.03mm) | 1.008" (25.60mm) | 1.220" (31.00mm) | 0.839" (21.30mm) | 0.650" (16.50mm) | 1.032" (26.20mm) | 1.189" (30.20mm) | 1.091" (27.70mm) | 0.650" (16.50mm) |
| Thickness (Max) | - | - | - | - | - | - | - | - | - |
| Lead Spacing | 0.199" (5.05mm) | 0.400" (10.15mm) | 0.400" (10.15mm) | 0.199" (5.05mm) | 0.199" (5.05mm) | 0.400" (10.15mm) | 0.400" (10.15mm) | 0.400" (10.15mm) | 0.199" (5.05mm) |
