Features n Surface mount packaging for automated assembly n Small footprint size (1210) and low profile for space-constrained mobile applications n Ultra-low resistance, quick response n RoHS compliant* n Agency recognition: MF-USML/X Series - Low Ohmic PTC Resettable Fuses Electrical Characteristics Tripped I I Resistance Max. Time To Trip Power Certifications hold trip Dissipation V max. I max. Model Watts at at 23 C at 23 C Ohms at 23 C cUL TV 23 C Typ. Volts Amps Amps R R Amps Seconds E174545 R50391579 1 min max MF-USML175/12 12 50 1.75 3.5 0.006 0.050 8.0 0.8 1.0 3 3 MF-USML200/12 12 50 2.0 4.0 0.005 0.040 8.0 5.0 1.0 3 3 MF-USML260/12 12 50 2.6 5.2 0.004 0.030 8.0 5.0 1.0 3 3 MF-USML300/12 12 50 3.0 6.0 0.003 0.024 15.0 5.0 1.0 3 3 MF-USML350/12 12 50 3.5 7.0 0.002 0.022 17.0 5.0 1.0 3 3 MF-USML380/12 12 50 3.8 7.6 0.002 0.020 19.0 5.0 1.0 3 3 MF-USML400/12 12 50 4.0 8.0 0.002 0.018 20.0 5.0 1.0 3 3 MF-USML450/12 12 50 4.5 9.0 0.002 0.014 22.5 2.0 1.0 3 3 MF-USML500/12 12 50 5.0 10.0 0.001 0.012 25.0 2.0 1.2 3 3 MF-USML550/12 12 50 5.5 11.0 0.001 0.010 27.5 2.0 1.2 3 3 Environmental Characteristics Operating Temperature ......................................... -40 C to +85 C Storage Condition Before Opening ............................................... +40 C max. / 70 % RH max. After Opening................................................... +40 C max. / 10 % RH max. Floor Condition After Opening .............................. Consumption within 4 weeks at floor condition +30 C max. / 60 % RH max. Passive Aging ....................................................... +85 C, 1000 hours ............................................... 10 % typical resistance change Humidity Aging...................................................... +85 C, 85 % R.H. 100 hours ............................... 15 % typical resistance change Thermal Shock ..................................................... +85 C to -40 C, 20 times .................................... 30 % typical resistance change Solvent Resistance ............................................... MIL-STD-202, Method 215 ................................... No change (marking still legible) Vibration ............................................................... MIL-STD-883C, Method 2007.1, ........................... No change (R <R<R ) min 1max Condition A Moisture Sensitivity Level (MSL) .......................... See Note ESD Classification - HBM ..................................... 6 Test Procedures and Requirements Test Test Conditions Accept/Reject Criteria Visual/Mech........................................................ Verify dimensions and materials ........................... Per MF physical description Resistance ............................................................ In still air 23 C ................................................. R R R min 1max Time to Trip ........................................................... At specified current, V , 23 C .......................... T max. time to trip (seconds) max Hold Current ......................................................... 30 min. at I ...................................................... No trip hold Trip Cycle Life ....................................................... V , I , 100 cycles.......................................... No arcing or burning max max Trip Endurance ..................................................... V , 48 hours ..................................................... No arcing or burning max Solderability .......................................................... 245 C 5 C, 5 seconds ...................................... 95 % min. coverage WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov * RoHS Directive 2015/863, Mar 31, 2015 and Annex. ** Bourns considers a product to be halogen free if (a) the Bromine (Br) content is 900 ppm or less (b) the Chlorine (Cl) content is 900 ppm or less and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.Applications n Li-ion battery pack protection n Power delivery port protection n Higher voltage withstand n PC motherboards Plug & Play protection n Mobile phones battery & charging protection n USB port protection n Game console port protection MF-USML/X Series Low Ohmic PTC Resettable Fuses MF-NSMF Series - PTC Resettable Fuses Product Dimensions A B C D E Model Min. Max. Min. Max. Min. Max. Min. Min. Max. MF-USML175/12 3.00 3.43 2.35 2.80 0.40 0.80 0.25 0.05 0.45 MF-USML200/12 (0.12) (0.14) (0.09) (0.11) (0.016) (0.031) (0.010) (0.002) (0.018) MF-USML260/12 MF-USML300/12 MF-USML350/12 MF-USML380/12 3.00 3.43 2.35 2.80 0.60 1.20 0.25 0.05 0.45 MF-USML400/12 (0.12) (0.14) (0.09) (0.11) (0.024) (0.047) (0.010) (0.002) (0.018) MF-USML450/12 MF-USML500/12 MF-USML550/12 MM DIMENSIONS: (INCHES) Top View Side View Bottom View Terminal material: Recommended Pad Layout ENIG-plated terminals A C D E 1.0 0.05 1.0 0.05 (.039 .002) (.039 .002) B 2.5 0.1 (.098 .004) 2.0 0.1 (.079 .004) Packaging Quantity MF-USML175/12 ~ MF-USML260/12 = 5000 pcs. per reel MF-USML300/12 ~ MF-USML550/12 = 3500 pcs. per reel Thermal Derating Table - I (Amps) hold Ambient Operating Temperature Model -40 C -20 C 0 C 23 C 40 C 50 C 60 C 70 C 85 C MF-USML175/12 2.57 2.33 2.07 1.75 1.49 1.34 1.24 1.00 0.88 MF-USML200/12 2.94 2.65 2.35 2.00 1.70 1.53 1.42 1.14 1.00 MF-USML260/12 3.82 3.46 3.07 2.60 2.21 1.95 1.85 1.48 1.30 MF-USML300/12 4.41 3.99 3.54 3.00 2.55 2.30 2.13 1.71 1.50 MF-USML350/12 5.10 4.65 4.13 3.50 2.98 2.65 2.50 2.00 1.75 MF-USML380/12 5.59 5.05 4.48 3.80 3.23 2.95 2.70 2.17 1.90 MF-USML400/12 5.80 5.25 4.70 4.00 3.40 3.10 2.80 2.28 2.00 MF-USML450/12 6.30 5.65 4.95 4.50 3.83 3.40 2.95 2.50 2.05 MF-USML500/12 7.00 6.25 5.50 5.00 4.25 3.75 3.25 2.75 2.25 MF-USML550/12 7.70 6.90 6.05 5.50 4.68 4.15 3.60 3.05 2.40 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.