Type UMTS 250V UMF Square Ceramic Surface Mount Time Lag Fuse UMTS Series 4818 Size RoHS 2 Compliant Features - Time lag - 250VAC, Voltage Rating - Wide range of current rating from 250mA to 6.3A - Wide operating temperature range - Tape & Reel for auto-insert SMD process - RoHS 2 compliant - Halogen Free - Lead Free Applications - Lighting system - LCD monitor - Office electronic equipment LEAD FREE = - Industrial equipment HALOGEN FREE = - Medical equipment - Power supply Electrical Characteristics (Per IEC60127-4) Safety Agency Approvals Blow Time Testing Safety Safety Agency Voltage Rating Ampere Range / Volt Agency Certificate (V) I.R. ability* Current Minimum Maximum 125% 1 Hr. N/A 250mA 6.3A/250V AC 250mA-6.3A/250V 150A AC E315341 200% N/A 2 Min. /350V AC /350V 100A AC 1000% 0.01 Sec 0.1 Sec R 50399509 Tested according to 1.6A/250V AC 1.6A/250V 150A AC IEC60127- /350V AC /350V 100A AC 1:2006+A1+A2 IEC 60127-7:2016 *I.R.= Interrupting Rating = Short Circuit Rating(Amps) Physical Specifications Body : Ceramic Materials Terminations : Brass Caps, gold plated with nickel undercoating On Fuse : be,,Current Ratin,250,in black color. On Label : Marking be,UMT,Current Ratin,Voltage Ratin,Interrupting Ratin, Appropriate Safety Logo and , (China RoHS compliant). Specifications subject to change without notice belfuse.com/circuit-protection END OF LIFE 2 / 4 Type UMTS 250V UMF Environmental Specifications MIL-STD-202G, Method 213B, Test Condition 1 Shock Resistance (100 G s peak for 6 milliseconds Sawtooth waveform) Vibration Resistance MIL-STD-202G, Method 201A (10-55 Hz, 0.06 inch, total excursion). Salt Spray Resistance MIL-STD-202G, Method 101E, Test Condition B (48 hrs). MIL-STD-202G, Method 302, Test Condition B Insulation Resistance (After Opening) 0.1Mohms minimum. Solderability MIL-STD-202G, Method 208H Resistance to solder Heat MIL-STD-202G, Method 210F, Test Condition J. (235 ,30 sec) MIL-STD-202G, Method 107G, Test Condition B Thermal Shock (-65 to +125). Operating Temperature -55 to +125 Moisture Sensitivity Level 1 ( Peak Temperature at 240 for 30 seconds max ) Electrical Specifications Agency Maximum Typical Volt-drop Voltage and Melting IT Approvals Catalog Ampere Cold Power 100% In Interrupting 10 In Rating Resistance Number Dissipation (Volt) max. Ratings (A Sec) (ohms) (W) UMTS 250 250mA 0.78 0.314 0.26 0.12 Y UMTS 315 315mA 0.56 0.279 0.42 0.14 Y UMTS 400 400mA 0.35 0.248 0.67 0.16 Y UMTS 500 500mA 0.245 0.221 1.1 0.19 Y UMTS 630 630mA 0.180 0.197 1.7 0.21 Y UMTS 800 800mA 0.132 0.175 2.8 0.25 Y UMTS 1 1A 0.085 0.156 See Table of Safety 4.4 0.28 Y Approvals on Page 1 UMTS 1.25 1.25A 0.065 0.155 for Voltage and 7.0 0.33 Y associated UMTS 1.6 1.6A 0.061 0.150 5.6 0.37 Y Y Interrupting Ratings UMTS 2 2A 0.043 0.145 9.2 0.43 Y UMTS 2.5 2.5A 0.035 0.140 15 0.50 Y UMTS 3.15 3.15A 0.025 0.135 25 0.57 Y UMTS 4 4A 0.020 0.130 42 0.66 Y UMTS 5 5A 0.014 0.120 69 0.75 Y UMTS 6.3 6.3A 0.011 0.115 113 0.87 Y Consult manufacturer for other ratings Specifications subject to change without notice Bel Fuse Inc. +1 201.432.0463 206 Van Vorst Street Bel.US.CS belf.com Jersey City, NJ 07302 USA belfuse.com/circuit-protection 2019 Bel Fuse, Inc. Rev. UMTS Nov2019 END OF LIFE