Surface Mount Fuses Ceramic Fuse > 440 Series 440 Series, 1206 High I2t Fuse Description The 440 Series is a 100% Lead-free, RoHS compliant and Halogen-free fuse series designed specifically to provide over-current protection to circuits that operate under high working ambient temperatures up to 150ºC and high inrush currents. This high I2t fuse series is designed to have ultra high inrush current withstand capability to avoid nuisance fuse open. Agency Approvals Agency Features Agency File Number Ampere Range E10480 .25A - 8A LR 29862 .25A - 8A • Operating Temperature from -55ºC to +150ºC • 100% Lead-free, RoHS compliant and Halogenfree Ampere Rating 100% 0.25A - 8A 350% 0.25A - 8A • Ultra high I2t values Applications Electrical Characteristics for Series % of Ampere Rating • Suitable for both leaded and lead-free reflow / wave soldering • Automotive Electronics • Printers • LCD Displays • Scanners 4 hours, Minimum • Servers • Data Modems 5 secs., Maximum • Notebook Computers • Hard Disk Drives Opening Time at 25ºC Electrical Specifications by Item Ampere Rating (A) Amp Code Max. Voltage Rating (V) 0.25 0.375 0.5 0.75 1 1.25 1.5 1.75 2 2.5 3 3.5 4 5 7 8 .250 .375 .500 .750 001. 1.25 01.5 1.75 002. 02.5 003. 03.5 004. 005. 007. 008. 125 125 63 63 50 50 50 32 32 32 32 32 32 32 32 32 Nominal Nominal Nominal Voltage Nominal Power Agency Approvals Interrupting Rating Resistance Melting I2t Drop At Rated Dissipation At 1 (AC/DC) (Ohms)2 (A2Sec.)3 Current (V)4 Rated Current (W) 50 A @ 125 V AC/DC 50 A @ 63 V AC/DC 50 A @ 63 V AC/DC 50 A @ 50 V DC 50 A @ 50 V AC 50 A @ 32 V AC/DC 2.140 1.216 0.8140 0.4624 0.3096 0.2268 0.1759 0.04518 0.03802 0.02850 0.02252 0.01845 0.01553 0.01164 0.00753 0.00634 0.00649 0.01455 0.02642 0.09312 0.21054 0.40200 0.50652 0.3312 0.4326 0.8191 1.232 1.789 2.601 4.761 8.464 12.95 Notes: 1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting Rating tested at rated voltage with time constant < 0.8 msec. 2.Nominal Resistance measured with < 10% rated current. 3.Nominal Melting I²t measured at 1 msec. opening time. 4.Nominal Voltage Drop measured at rated current after temperature has stabilized. © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/440.html for current information. 0.5260 0.4993 0.4831 0.3983 0.3457 0.3240 0.3215 0.0777 0.0792 0.0747 0.0742 0.0757 0.0709 0.0654 0.0696 0.0655 0.132 0.187 0.242 0.299 0.346 0.405 0.482 0.136 0.158 0.187 0.223 0.265 0.284 0.327 0.487 0.524 x x x x x x x x x x x x x x x x X X X X X X X X X X X X X X X X Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See “Temperature Derating Curve”for additional derating information. Devices designed to be mounted with marking code facing up. 1 Revised: June 23, 2011 440 Series 440 Series The general design ensures excellent temperature stability and performance reliability. Mount Fuses IntroductionSurface to Circuit Protection Ceramic FuseTransientology > 440 Series Temperature Derating Curve Average Time Current Curves 100 120 100 10 80 60 TIME IN SECONDS PERCENT OF RATING 140 40 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (°C) 1 0.1 Note: 1. Derating depicted in this curve is in addition to the standard derating of 20% for continuous operation. 0.01 Example: For continuous operation at 75 degrees celsius, the fuse should be derated as follows: I = (0.80)(0.85)IRAT = (0.68)IRAT 0.001 0.1 1.0 10.0 100.0 1000. CURRENT IN AMPERES Soldering Parameters Pb-free assembly Pre Heat - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 seconds Average Ramp-Up Rate (Liquidus Temp (TL) to peak) 3°C/second max. TS(max) to TL - Ramp-up Rate 5°C/second max. Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds 260 Time within 5°C of actual peak Temperature (tp) 10 – 30 seconds Ramp-down Rate 6°C/second max. Time 25°C to peak Temperature (TP) 8 minutes max. Do not exceed 260°C Wave Soldering 440 Series Critical Zone TL to TP Ramp-up TL TS(max) tL Ramp-down TS(min) 25 Peak Temperature (TP) +0/-5 tP TP Temperature Reflow Condition Preheat tS time to peak temperature (t 25ºC to peak) Time °C 260°C, 10 seconds max. 2 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/440.html for current information. Surface Mount Fuses Ceramic Fuse > 440 Series Materials Body: Advanced Ceramic Terminations: A g / Ni / Sn (100% Lead-free) Element Cover Coating: Lead-free Glass Moisture IPC/JEDEC J-STD-020C, Level 1 Sensitivity Level Solderability IPC/ECA/JEDEC J-STD-002B, Condition C Humidity Test MIL-STD-202, Method 103B, Conditions D Resistance to Solder Heat MIL-STD-202, Method 210F, Condition B Dimensions Moisture Resistance MIL-STD-202, Method 106G Thermal Shock MIL-STD-202, Method 107G, Condition B Mechanical Shock MIL-STD-202, Method 213B, Condition A Vibration MIL-STD-202, Method 201A Vibration, High Frequency MIL-STD-202, Method 204D, Condition D Dissolution of Metallization IPC/ECA/JEDEC J-STD-002C, Condition D Terminal Strength IEC 60127-4 440 Series Product Characteristics Part Marking System Amp Code .250 .375 .500 .750 001. 1.25 01.5 1.75 002. 02.5 003. 03.5 004. 005. 007. 008. 3.200 ± .1778 [.126 ± .007] X 1.000 [.039] 1.63 + .10/ -.20 [.064 + .004/ -.008] .8179 +.046/ -.076 [.0322 +.0018/ -.003] TERMINATION Marking Code D E F G H J K L N O P R S T W X Part Numbering System 0.520 ± .200 [.020 ± .008] 1.000 [.039] 0440 008. W R SERIES 1.500 [.059] Amp code 1.800 [.071] quantity code W = 3000 pcs 3.500 [.138] packing Code R = Reel Pack Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA-481, IEC 60286, Part 3 3000 WR © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/440.html for current information. 3 440 Series