| PartNumber | LR4-190F | LR4-190LF | LR4-190SLF |
| Description | Resettable Fuses - PPTC LR4-190F | Resettable Fuses - PPTC 15V 1.9A Ih 0.102ohm | Resettable Fuses - PPTC 1.9A STRAP Polyswitch PTC RESET |
| Manufacturer | Littelfuse | Littelfuse | - |
| Product Category | Resettable Fuses - PPTC | Resettable Fuses - PPTC | - |
| RoHS | Y | - | - |
| Series | LR4 | LR4 | - |
| Mounting Style | Strap | SMD/SMT | - |
| Termination Style | Axial | SMD/SMT | - |
| Hold Current | 1.9 A | 1.9 A | - |
| Maximum Voltage | 15 V | 15 V | - |
| Trip Current | 3.9 A | 3.9 A | - |
| Current Rating Max | 100 A | - | - |
| Resistance | 72 mOhms | 102 mOhms | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 125 C | - | - |
| Packaging | Bulk | Bulk | - |
| Type | PolySwitch Resettable Devices | PolySwitch Resettable Fuses | - |
| Brand | Littelfuse | Littelfuse | - |
| Pd Power Dissipation | 800 mW | - | - |
| Product Type | Resettable Fuses - PPTC | Resettable Fuses - PPTC | - |
| Factory Pack Quantity | 2000 | 2000 | - |
| Subcategory | PPTC Resettable Fuses | PPTC Resettable Fuses | - |
| Tradename | PolySwitch | PolySwitch | - |
| Part # Aliases | E24709-000 RF1538-000 | RF0782-000 | - |