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 = HALOGEN FREE = - Industrial equipment - Medical equipment - Power supply Electrical Characteristics (Per IEC60127-4) Blow Time Testing Current Minimum 125% 1 Hr. N/A 200% N/A 2 Min. 1000% 0.01 Sec 0.1 Sec Maximum Safety Agency Approvals Safety Agency Safety Agency Certificate E315341 Voltage Rating (V) 250mA-6.3A/250V AC 250mA-6.3A/250V@150A AC /350V AC R 50399509 Tested according to IEC601271:2006+A1+A2 IEC 60127-7:2016 Ampere Range / Volt @ I.R. ability* 1.6A/250V AC /350V AC /350V@100A AC 1.6A/250V@150A AC /350V@100A AC *I.R.= Interrupting Rating = Short Circuit Rating(Amps) Physical Specifications Body : Ceramic Materials Terminations : Brass Caps, gold plated with nickel undercoating On Fuse : "bel", "T", "Current Rating", "L","250V",in black color. Marking On Label : "bel", "UMTS", "Current Rating", "Voltage Rating", "Interrupting Rating", "Appropriate Safety Logos" and " ", " "(China RoHS compliant). Specifications subject to change without notice belfuse.com/circuit-protection Type UMTS 250V UMF 2/4 Environmental Specifications Shock Resistance MIL-STD-202G, Method 213B, Test Condition 1 (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). Insulation Resistance MIL-STD-202G, Method 302, Test Condition B (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 Approvals Melting IT @10 In (A Sec) Maximum Power Dissipation (W) 0.314 0.26 0.12 Y 0.56 0.279 0.42 0.14 Y 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 1A 0.085 0.156 4.4 0.28 Y UMTS 1.25 1.25A 0.065 0.155 7.0 0.33 Y UMTS 1.6 1.6A 0.061 0.150 5.6 0.37 Y 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 6.3A 0.011 0.115 113 0.87 Y Catalog Number Ampere Rating Typical Cold Resistance (ohms) Volt-drop @100% In (Volt) max. UMTS 250 250mA 0.78 UMTS 315 315mA UMTS 400 UMTS 1 UMTS 2 UMTS 6.3 Voltage and Interrupting Ratings See Table of Safety Approvals on Page 1 for Voltage and associated Interrupting Ratings Y Consult manufacturer for other ratings Specifications subject to change without notice Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 USA +1 201.432.0463 Bel.US.CS@belf.com belfuse.com/circuit-protection (c) 2019 Bel Fuse, Inc. Rev. UMTS Nov2019 Type UMTS 250V UMF Temperature Derating Curve 3/4 Average Time Current Curve Soldering Parameters IR Reflow Profile Preheat & Soak Temperature min (Tsmin) Temperature max (Tsmax) Time (Tsmin to Tsmax) (ts) 150 200 60-120 seconds Average ramp-up rate (Tsmax to Tp) 3/second max. Liquidous temperature (TL) Time at liquidous (tL) 217 60-150 seconds Peak temperature (Tp) 240 max Time (tp) within 5 of the specified classification temperature (Tc) 30 seconds Average ramp-down rate (Tp to Tsmax) 6/second max. Time 25 to peak temperature 8 minutes max. Soldering Guidelines Reflow Conditions Recommended 240, 30 sec. max. NOT Recommended for Wave solder / Direct immersion / Hand Solder Specifications subject to change without notice Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 USA +1 201.432.0463 Bel.US.CS@belf.com belfuse.com/circuit-protection (c) 2019 Bel Fuse, Inc. Rev. UMTS Nov2019 Type UMTS 250V UMF 4/4 Fuse FGNO Explanation 0683 - [XXXX] - XX 0683-=UMTS; [XXXX]=Ampere Rating; XX=See Ordering Information as below Fraction Decimal Milliamps Bel FGNO[XXXX] 1/4 0.250 250 0250 .315 315 0315 4/10 .400 400 1/2 .500 8/10 Fraction Decimal Bel FGNO[XXXX] 1 1000 1.25 1.25 1250 0400 1.60 1.6 1600 500 0500 2.0 2 2000 .630 630 0630 2.5 2.5 2500 .800 800 0800 3.15 3.15 3150 4.0 4 4000 5.0 5 5000 6.3 6.3 6300 Mechanical Dimensions 1.0 Amps 1-1/4 2-1/2 Ordering Information Packaging Packaging Tape & Reel Packaging Specification Quantity Quantity & Packaging Code 24 mm wide tape with 13 inches Diameter reel EIA Standard 481-E 1500 01 Specifications subject to change without notice Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 USA +1 201.432.0463 Bel.US.CS@belf.com belfuse.com/circuit-protection (c) 2019 Bel Fuse, Inc. Rev. UMTS Nov2019