| PartNumber | RUSBF185-AP | RUSBF185-2 | RUSBF185 |
| Description | Resettable Fuses - PPTC Polyswitch 2A 6V | Resettable Fuses - PPTC Radial Lead 1.85A 16V 40A Imax | Resettable Fuses - PPTC Radial Lead 1.85A 16V 40A Imax |
| Manufacturer | Littelfuse | TE Connectivity Raychem Circuit Protection | TE Connectivity Raychem Circuit Protection |
| Product Category | Resettable Fuses - PPTC | PTC Resettable Fuses | PTC Resettable Fuses |
| RoHS | Y | - | - |
| Series | RUSBF | PolySwitchR, RUSBF | PolySwitchR, RUSBF |
| Mounting Style | Through Hole | Through Hole | Through Hole |
| Termination Style | Radial | Radial | Radial |
| Hold Current | 1.85 A | 1.85 A | 1.85 A |
| Maximum Voltage | 16 V | 16 VDC | 16 VDC |
| Trip Current | 3.7 A | 3.7 A | 3.7 A |
| Current Rating Max | - | - | - |
| Resistance | 90 mOhms | 0.09 Ohms | 0.09 Ohms |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Reel | Tape & Reel (TR) Alternate Packaging | Bulk Alternate Packaging |
| Type | PolySwitch Resettable Fuses | PolySwitch Resettable Fuses | PolySwitch Resettable Fuses |
| Brand | Littelfuse | - | - |
| Product Type | Resettable Fuses - PPTC | - | - |
| Factory Pack Quantity | 2000 | - | - |
| Subcategory | PPTC Resettable Fuses | - | - |
| Tradename | PolySwitch | - | - |
| Part # Aliases | RF3397-000 | - | - |
| Part Aliases | - | A71321-000 RF3396-000 | A60228-000 RF3212-000 |
| Operating Temperature Range | - | - 40 C to + 85 C | - 40 C to + 85 C |
| Height | - | 15.7 mm | 3 mm |
| Length | - | 10.2 mm | 15.7 mm |
| Package Case | - | Radial, Disc | Radial, Disc |
| Current Max | - | 40A | 40A |
| Current Hold Ih Max | - | 1.85A | 1.85A |
| Voltage Max | - | 16V | 16V |
| Current Trip It | - | 3.7A | 3.7A |
| R Min Max | - | 0.030 ~ 0.090 Ohm | 0.030 ~ 0.090 Ohm |
| Time to Trip | - | 10s | 10s |
| Current Rating Max | - | 40 A | 40 A |
| Pd Power Dissipation | - | 1 W | 1 W |
| Width | - | - | 10.2 mm |
| Lead Spacing | - | - | 5.8 mm |