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| Part Number | SRP420F | SRP120F | SRP420 |
|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. |
| Product Status | Active | Active | Obsolete |
| Type | Polymeric | Polymeric | Polymeric |
| Voltage - Max | 30V | 15V | 30V |
| Current - Max | 100 A | 100 A | 100 A |
| Current - Hold (Ih) (Max) | 4.2 A | 1.2 A | 4.2 A |
| Current - Trip (It) | 7.6 A | 2.7 A | 7.6 A |
| Time to Trip | 6 s | 5 s | 6 s |
| Resistance - Initial (Ri) (Min) | 12 mOhms | 85 mOhms | 12 mOhms |
| Resistance - Post Trip (R1) (Max) | 40 mOhms | 220 mOhms | 40 mOhms |
| Resistance - 25°C (Typ) | - | - | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Ratings | - | - | - |
| Mounting Type | User Defined | User Defined | User Defined |
| Package / Case | Strap | Strap | Strap |
| Size / Dimension | 1.240" L x 0.522" W (31.50mm x 13.25mm) | 0.827" L x 0.199" W (21.00mm x 5.05mm) | 1.240" L x 0.522" W (31.50mm x 13.25mm) |
| Height - Seated (Max) | - | - | - |
| Thickness (Max) | 0.043" (1.10mm) | 0.039" (1.00mm) | 0.043" (1.10mm) |
| Lead Spacing | - | - | - |
