| Parameters | 
                                                                                                            
                                            | Mfr | Littelfuse Inc. | 
                                                                            
                                            | Series | PolySwitch®, RUSBF | 
                                                                            
                                            | Package | Tape & Reel (TR) | 
                                                                            
                                            | Product Status | Active | 
                                                                            
                                            | Type | Polymeric | 
                                                                            
                                            | Voltage - Max | 16V | 
                                                                            
                                            | Current - Max | 40 A | 
                                                                            
                                            | Current - Hold (Ih) (Max) | 2.5 A | 
                                                                            
                                            | Current - Trip (It) | 5 A | 
                                                                            
                                            | Time to Trip | 40 s | 
                                                                            
                                            | Resistance - Initial (Ri) (Min) | 20 mOhms | 
                                                                            
                                            | Resistance - Post Trip (R1) (Max) | 60 mOhms | 
                                                                            
                                            | Operating Temperature | -40°C ~ 85°C | 
                                                                            
                                            | Ratings | - | 
                                                                            
                                            | Mounting Type | Through Hole | 
                                                                            
                                            | Package / Case | Radial, Disc | 
                                                                            
                                            | Size / Dimension | 0.449" L x 0.118" W (11.40mm x 3.00mm) | 
                                                                            
                                            | Height - Seated (Max) | 0.720" (18.30mm) | 
                                                                            
                                            | Thickness (Max) | - | 
                                                                            
                                            | Lead Spacing | 0.118" (3.00mm) | 
                                                                            
                                            | Approval Agency | CSA, TUV, UL | 
                                                                            
                                            | RoHS Status | ROHS3 Compliant | 
                                                                            
                                            | Moisture Sensitivity Level (MSL) | Not Applicable | 
                                                                            
                                            | REACH Status | REACH Unaffected | 
                                                                            
                                            | ECCN | EAR99 | 
                                                                            
                                            | HTSUS | 8533.40.8070 | 
                                                                            
                                            | Standard Package | 3,000 | 
                                                                                                    
                            
                         
                                                Polymeric PTC Resettable Fuse 16V 2.5 A Ih Through Hole Radial, Disc