Surface Mount Fuses Ceramic Fuse > 440 Series 440 Series, 1206 High I2t Fuse RoHS Pb 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. The general design ensures excellent temperature stability and performance reliability. This high I2t fuse series is designed to have ultra high inrush current withstand capability to avoid nuisance fuse open. Features • Operating Temperature • Suitable for both leaded from -55ºC to +150ºC and lead-free reflow / wave soldering • 100% Lead-free, RoHS compliant and Halogen-free • Ultra high I2t values Agency Approvals Applications AGENCY AGENCY FILE NUMBER AMPERE RANGE • LCD Displays • Scanners E10480 0.25A - 8A • Servers • Data Modems 29862 0.25A - 8A • Notebook Computers • Hard Disk Drives • Printers Electrical Characteristics for Series Additional Information % of Ampere Ampere Rating Opening Time at 25ºC Rating 100% 0.25A - 8A 4 hours, Minimum 350% 0.25A - 8A 5 secs., Maximum Datasheet Resources Samples Electrical Specifications by Item Ampere Max. Nominal Nominal Nominal Voltage Nominal Power Agency Approvals Amp Interrupting Rating Rating Voltage Resistance Melting I2t Drop At Rated Dissipation At Code (AC/DC)1 (A) Rating (V) (Ohms)2 (A2Sec.)3 Current (V)4 Rated Current (W) 0.250 .250 125 2.140 0.00649 0.5260 0.132 x X 50 A @ 125 V AC/DC 0.375 .375 125 1.216 0.01455 0.4993 0.187 x X 0.500 .500 63 50 A @ 63 V AC/DC 0.8140 0.02642 0.4831 0.242 x X 0.750 .750 63 50 A @ 63 V AC/DC 0.4624 0.09312 0.3983 0.299 x X 1.00 001. 50 0.3096 0.21054 0.3457 0.346 x X 50 A @ 50 V DC 1.25 1.25 50 0.2265 0.379 0.3240 0.405 x X 50 A @ 50 V AC 1.50 01.5 50 0.1759 0.50652 0.3215 0.482 x X 1.75 1.75 32 0.0450 0.3312 0.0777 0.136 x X 2.00 002. 32 0.0385 0.4326 0.0792 0.158 x X 2.50 02.5 32 0.02850 0.8191 0.0747 0.187 x X 3.00 003. 32 0.02252 1.232 0.0742 0.223 x X 3.50 03.5 32 50 A @ 32 V AC/DC 0.01845 1.789 0.0757 0.265 x X 4.00 004. 32 0.01553 2.601 0.0709 0.284 x X 5.00 005. 32 0.0120 4.761 0.0654 0.327 x X 7.00 007. 32 0.00753 8.464 0.0696 0.487 x X 8.00 008. 32 0.00634 12.95 0.0655 0.524 x X Notes: 1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting Devices designed to carry rated current for 4 hours minimum. It is recommended that Rating tested at rated voltage with time constant < 0.8 msec. devices be operated continuously at no more than 80% rated current. See “Temperature 2. Nominal Resistance measured with < 10% rated current. Derating Curve”for additional derating information. 3. Contact Littelfuse if application transient surges are less than 1 ms. Devices designed to be mounted with marking code facing up. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized. © 2018 Littelfuse, Inc. Specifications are subject to change without notice.Application testing is strongly recommended. Revised: 12/13/18

Surface Mount Fuses Ceramic Fuse > 440 Series Temperature Rerating Curve Average Time Current Curves 140 100 G120 N TI A R100 F 10 O T N80 E C R E P60 S D 1 N O C 40 E S -65 -45 -25 -5 15 35 55 75 95 115 135 155 N TEMPERATURE (°C) E I M TI 0.1 Note: 1. Rerating 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)I = (0.68)I RAT RAT 0.001 0.1 1.0 10.0 100.0 1000. CURRENT IN AMPERES Soldering Parameters Reflow Condition Pb-free assembly tP T P Critical Zone - Temperature Min (T ) 150°C Ramp-up TL to TP s(min) T Pre Heat -- TTeimmep e(Mraitnu rteo MMaaxx )( T(ts()max)) 2600 0–° C180 seconds eruTS(maxL) tL s ta Average Ramp-Up Rate (Liquidus Temp re Ramp-down 3°C/second max. p Preheat (T) to peak) mT L S(min) T to T - Ramp-up Rate 5°C/second max. eT tS S(max) L - Temperature (T) (Liquidus) 217°C Reflow L 25 - Temperature (tL) 60 – 150 seconds time (tto 2 p5eºCak t ote pmepaekr)ature Time Peak Temperature (T ) 260+0/-5 °C P Time within 5°C of actual peak 10 – 30 seconds Temperature (t ) p Ramp-down Rate 6°C/second max. Time 25°C to peak Temperature (T ) 8 minutes max. P Do not exceed 260°C Wave Soldering 260°C, 10 seconds max. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/13/18

Surface Mount Fuses Ceramic Fuse > 440 Series Product Characteristics Moisture Resistance MIL-STD-202, Method 106 Body: Advanced Ceramic Materials Terminations: Ag / Ni / Sn (100% Lead-free) MIL-STD-202, Method 107, Thermal Shock Element Cover Coating: Lead-free Glass Condition B MIL-STD-202, Method 213, Moisture Mechanical Shock Condition A IPC/JEDEC J-STD-020, Level 1 Sensitivity Level Vibration MIL-STD-202, Method 201 Solderability IPC/ECA/JEDEC J-STD-002, Condition C Vibration, MIL-STD-202, Method 204, High Frequency Condition D Humidity Test MIL-STD-202, Method 103, Conditions D Dissolution of IPC/ECA/JEDEC J-STD-002, Metallization Condition D Resistance to MIL-STD-202, Method 210, Condition B Solder Heat Terminal Strength IEC 60127-4 Dimensions Part Marking System Amp Code Marking Code Amp Code Marking Code 3.200 ± .1778 [.126 ± .007] .250 D 002. N .375 E 02.5 O X .500 F 003. P .750 G 03.5 R 1.000 1.63 + .10/ -.20 [.039] [.064 + .004/ -.008] 001. H 004. S 1.25 J 005. T 01.5 K 007. W 1.75 L 008. X Part Numbering System .8179 +.046/ -.076 [.0322 +.0018/ -.003] 0440 008. W R TERMINATION SERIES AMP CODE QUANTITY CODE W = 3000 pcs 0.520 ± .200 [.020 ± .008] PACKING CODE R = Reel Pack 1.000 1.500 [.039] [.059] Packaging 1.800 [.071] Packaging Packaging Quantity & Quantity Option Specification Packaging Code 3.500 [.138] 8mm Tape EIA-481, IEC 60286, 3000 WR and Reel Part 3 Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/13/18