Features This MF-USML series is currently available, although not recommended n Surface mount packaging for automated for new designs. The enhanced assembly MF-USML/X Series is recommended for new n Small footprint size (1210) and low profile designs. for space-constrained mobile applications n Ultra-low resistance n RoHS compliant* and halogen free** n Agency recognition: MF-USML Series - Low Ohmic PTC Resettable Fuses Electrical Characteristics Tripped Max. Time I I Resistance Power hold trip To Trip Dissipation V max. I max. Model Volts Amps Amperes Ohms Amperes Seconds Watts at 23 C at 23 C at 23 C at 23 C at 23 C R R Hold Trip Typ. Min. 1Max. MF-USML175 6 50 1.75 3.50 0.0060 0.0400 8.00 2.50 0.8 MF-USML190 6 50 1.90 4.90 0.0060 0.0300 9.50 3.00 0.8 MF-USML200 6 50 2.00 4.00 0.0050 0.0300 8.00 3.00 0.8 MF-USML230 6 50 2.30 4.60 0.0045 0.0240 8.00 3.50 0.8 MF-USML250 6 50 2.50 5.00 0.0045 0.0220 8.00 3.50 0.8 MF-USML270 6 50 2.70 5.40 0.0040 0.0200 8.00 4.00 0.8 MF-USML300 6 50 3.00 6.00 0.0040 0.0180 8.00 4.00 0.8 MF-USML350 6 50 3.50 7.00 0.0030 0.0180 17.50 2.00 0.8 MF-USML380 6 50 3.80 8.00 0.0020 0.0160 19.00 2.00 0.8 MF-USML400 6 50 4.00 8.00 0.0015 0.0155 20.00 2.00 0.8 MF-USML450 6 50 4.50 9.00 0.0010 0.0150 22.50 2.00 0.8 MF-USML500 6 50 5.00 10.00 0.0010 0.0145 25.00 2.00 0.8 MF-USML600 6 50 6.00 12.00 0.0010 0.0140 30.00 2.00 0.8 MF-USML650 6 50 6.50 13.00 0.0010 0.0140 32.50 2.00 0.8 MF-USML700 6 50 7.00 14.00 0.0010 0.0135 35.00 2.00 0.8 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 oor 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 Vibration ............................................................... MIL-STD-883C, Method 2007.1, ........................... No change Condition A Moisture Sensitivity Level (MSL) .......................... See Note ESD Classification - HBM ..................................... Class 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 ................................................. Rmin R R1max Time to Trip ........................................................... At specified current, Vmax, 23 C ......................... T max. time to trip (seconds) Hold Current ......................................................... 30 min. at Ihold ..................................................... No trip Trip Cycle Life ....................................................... Vmax, Imax, 100 cycles ........................................ No arcing or burning Trip Endurance ..................................................... Vmax, 48 hours ..................................................... No arcing or burning Solderability .......................................................... 245 C 5 C, 5 seconds .................................... 95 % min. coverage UL File Number .................................................... E174545 TV Certificate Number ....................................... R 50302873 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 Thermal protection for Li-ion and polymer n USB port protection - USB 2.0, 3.0 & OTG battery packs n Mobile phones n Game consoles n Digital cameras n PC motherboards MF-USML Series - Low Ohmic PTC Resettable Fuses Product Dimensions A B C D E Model Min. Max. Min. Max. Min. Max. Min. Min. Max. MF-USML175 MF-USML190 MF-USML200 MF-USML230 MF-USML250 3.00 3.43 2.35 2.80 0.30 0.60 0.25 0.05 0.45 (0.118) (0.135) (0.093) (0.110) (0.012) (0.024) (0.010) (0.002) (0.018) MF-USML270 MF-USML300 MF-USML350 MF-USML380 MF-USML400 MF-USML450 MF-USML500 3.00 3.43 2.35 2.80 0.60 1.20 0.25 0.05 0.45 MF-USML600 (0.118) (0.135) (0.093) (0.110) (0.024) (0.047) (0.010) (0.002) (0.018) MF-USML650 MF-USML700 MM DIMENSIONS: (INCHES) Side View Top View Bottom View Recommended Pad Layout A C D E 1.0 0.05 1.0 0.05 (.039 .002) (.039 .002) Terminal material: 2.5 0.1 B ENIG-plated terminals (.098 .004) 2.0 0.1 (.079 .004) Packaging Specifications MF-USML175~MF-USML400 = 5000 pcs. per reel MF-USML450~MF-USML700 = 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 2.57 2.33 2.07 1.75 1.49 1.34 1.24 1.00 0.88 MF-USML190 2.80 2.55 2.25 1.90 1.60 1.46 1.35 1.09 0.95 MF-USML200 2.94 2.65 2.35 2.00 1.70 1.53 1.42 1.14 1.00 MF-USML230 3.40 3.17 2.74 2.30 1.94 1.72 1.60 1.30 1.15 MF-USML250 3.70 3.35 2.95 2.50 2.10 1.90 1.75 1.40 1.25 MF-USML270 3.98 3.60 3.18 2.70 2.28 2.03 1.90 1.52 1.35 MF-USML300 4.41 3.99 3.54 3.00 2.55 2.30 2.13 1.71 1.50 MF-USML350 5.10 4.65 4.13 3.50 2.98 2.65 2.50 2.00 1.75 MF-USML380 5.59 5.05 4.48 3.80 3.23 2.95 2.70 2.17 1.90 MF-USML400 5.80 5.25 4.70 4.00 3.40 3.10 2.80 2.28 2.00 MF-USML450 6.30 5.65 4.95 4.50 3.83 3.40 2.95 2.50 2.05 MF-USML500 7.00 6.25 5.50 5.00 4.25 3.75 3.25 2.75 2.25 MF-USML600 8.40 7.50 6.60 6.00 5.10 4.50 3.90 3.30 2.65 MF-USML650 9.10 8.15 7.15 6.50 5.50 4.90 4.25 3.60 2.85 MF-USML700 9.80 8.75 7.70 7.00 5.95 5.25 4.55 3.85 3.05 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.