Fuse Mounting Accessories Page 23 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Surface Mount Fuses Ceramic Fuse > 440 Series 440 Series, 1206 High I 2 t 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 150C and high inrush currents. The general design ensures excellent temperature stability and performance reliability. This high I 2 t fuse series is designed to have ultra high inrush current withstand capability to avoid nuisance fuse open. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 .25A - 8A 29862 .25A - 8A Features Electrical Characteristics for Series Operating Temperature from -55C to +150C 100% Lead-free, RoHS compliant and Halogen-free Suitable for both leaded and lead-free reflow / wave soldering Ultra high I 2 t values % of Ampere Rating Ampere Rating Opening Time at 25C 100% 0.25A - 8A 4 hours, Minimum 350% 0.25A - 8A 5 secs., Maximum Applications Ampere Rating (A) Amp Code Max. Voltage Rating (V) Interrupting Rating (AC/DC) 1 Nominal Resistance (Ohms) 2 Nominal Melting I 2 t (A 2 Sec.) 3 Nominal Voltage Drop At Rated Current (V) 4 Nominal Power Dissipation At Rated Current (W) Agency Approvals 0.25 .250 125 50 A @ 125 V AC/DC 2.140 0.00649 0.5260 0.132 x X 0.375 .375 125 1.216 0.01455 0.4993 0.187 x X 0.5 .500 63 50 A @ 63 V AC/DC 0.8140 0.02642 0.4831 0.242 x X 0.75 .750 63 50 A @ 63 V AC/DC 0.4624 0.09312 0.3983 0.299 x X 1 001. 50 50 A @ 50 V DC 50 A @ 50 V AC 0.3096 0.21054 0.3457 0.346 x X 1.25 1.25 50 0.2265 0.379 0.3240 0.405 x X 1.5 01.5 50 0.1759 0.50652 0.3215 0.482 x X 1.75 1.75 32 50 A @ 32 V AC/DC 0.0450 0.3312 0.0777 0.136 x X 2 002. 32 0.0385 0.4326 0.0792 0.158 x X 2.5 02.5 32 0.02850 0.8191 0.0747 0.187 x X 3 003. 32 0.02252 1.232 0.0742 0.223 x X 3.5 03.5 32 0.01845 1.789 0.0757 0.265 x X 4 004. 32 0.01553 2.601 0.0709 0.284 x X 5 005. 32 0.0120 4.761 0.0654 0.327 x X 7 007. 32 0.00753 8.464 0.0696 0.487 x X 8 008. 32 0.00634 12.95 0.0655 0.524 x X Electrical Specifications by Item 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. Contact Littelfuse if application transient surges are less than 1 ms. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized. RoHS Pb LCD Displays Servers Notebook Computers Printers Scanners Data Modems Hard Disk Drives 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. Application testing is strongly recommended. Additional Information Datasheet Samples Resources

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