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. Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 1.75A - 8A Pending 1.75A - 8A t 0QFSBUJOH5FNQFSBUVSF from -55ºC to +150ºC t -FBEGSFF3P)4 compliant and Halogenfree t 4VJUBCMFGPSCPUIMFBEFE and lead-free reflow / wave soldering t 6MUSBIJHI*2t values Applications Electrical Characteristics for Series % of Ampere Rating Ampere Rating Opening Time at 25ºC 100% 1.75A - 8A 4 hours, Minimum 350% 1.75A - 8A 5 secs., Maximum t "VUPNPUJWF&MFDUSPOJDT t 1SJOUFST t -$%%JTQMBZT t 4DBOOFST t 4FSWFST t %BUB.PEFNT t /PUFCPPL$PNQVUFST t )BSE%JTL%SJWFT Electrical Specifications by Item Ampere Rating (A) 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) Amp Code Max. Voltage Rating (V) 1.75 1.75 32 0.04121 0.3312 0.07769 0.136 x x 2 002. 32 0.03582 0.4326 0.07921 0.158 x x 2.5 02.5 32 0.026706 0.8191 0.0747 0.187 x x 3 003. 32 3.5 03.5 32 0.022 1.232 0.7418 0.223 x x 0.01877 1.789 0.07566 0.265 x x 4 004. 5 005. 32 0.01515 2.601 0.07088 0.284 x x 32 0.01119 4.761 0.06544 0.327 x x 7 8 007. 32 0.00794 8.464 0.06963 0.487 x x 008. 32 0.00646 12.95 0.065526 0.524 x x 50 A @ 32 V AC/DC 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. 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. © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/440.html for current information. 440 Series Revised: September 17, 2009 440 Series The general design ensures excellent temperature stability and performance reliability. Mount Fuses IntroductionSurface to Circuit Protection Ceramic FuseTransientology > 440 Series Average Time Current Curves 1.75A 2A 2.5A 3A 3.5A 4A 5A 7A 8A Temperature Derating Curve PERCENT OF RATING 140 120 100 10 80 60 40 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (°C) TIME IN SECONDS 1 0.1 Note: 1. Derating depicted in this curve is in addition to the standard derating of 20% for continuous operation. &YBNQMF For continuous operation at 75 degrees celsius, the fuse should be derated as follows: 0.01 I = (0.80)(0.85)IRAT = (0.68)IRAT 0.001 1 10 100 CURRENT IN AMPERES 1000 Soldering Parameters Reflow Condition - 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 Peak Temperature (TP) 260+0/-5 °C 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 tP TP Critical Zone TL to TP Ramp-up TL Temperature Pre Heat 1CGSFFBTTFNCMZ tL TS(max) Ramp-down TS(min) Preheat tS 25 time to peak temperature (t 25ºC to peak) Time 260°C, 10 seconds max. © 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: Ag / Ni / Sn (100% Lead-free) Element Cover Coating: Lead-free Glass Moisture *1$+&%&$+45%$-FWFM Sensitivity Level Moisture Resistance MIL-STD-202, Method 106G Thermal Shock MIL-STD-202, Method 107G, $POEJUJPO# Mechanical Shock .*-45%.FUIPE# Condition A Vibration MIL-STD-202, Method 201A Vibration, High Frequency MIL-STD-202, Method 204D, Condition D Solderability *1$&$"+&%&$+45%#$POEJUJPO$ Humidity Test .*-45%.FUIPE#$POEJUJPOT% ESD Immunity *&$L7%JSFDU *1$&$"+&%&$+45%$ Condition D Resistance to Solder Heat Dissolution of Metallization .*-45%.FUIPE'$POEJUJPO# Terminal Strength *&$ Dimensions 440 Series Product Characteristics Part Marking System Amp Code 3.200 ± .1778 [.126 ± .007] X 1.000 [.039] 1.63 + .10/ -.20 [.064 + .004/ -.008] .8179 +.046/ -.076 [.0322 +.0018/ -.003] Marking Code 1.75 L 002. N 02.5 O 003. P 03.5 R 004. S 005. T 007. W 008. X TERMINATION Part Numbering System 0440 008. W R 0.520 ± .200 [.020 ± .008] 1.000 [.039] SERIES 1.500 [.059] AMP CODE QUANTITY CODE 1.800 [.071] W = 3000 pcs PACKING CODE 3.500 [.138] 33FFM1BDL Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel &*"*&$QBSU 3000 WR © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/440.html for current information. 440 Series Introduction to Circuit Protection Transientology © 2009 Littelfuse, Inc. Specifications are subject to change without notice.