Fuse Mounting Accessories Page 20 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Surface Mount Fuses Ceramic Fuse > 438 Series 438 Series - 0603 Fast-Acting Fuse Description The 438 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 temperature up to 150C. The general design ensures excellent temperature stability and performance reliability. The high It values which is typical in the Littelfuse Ceramic Fuse family ensure high inrush current withstand capability. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 0.250A - 6A 29862 0.250A - 6A 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 % of Ampere Rating Ampere Rating Opening Time at 25C 100% 0.250A - 6A 4 Hours, Minimum 250% 0.250A - 6A 5 Seconds, Maximum Applications Ampere Rating (A) Amp Code Max. Voltage Rating (V) Interrupting Rating 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 63VDC 50A @ 63VDC 50A @ 32VAC 2.218 0.0017 0.550 0.138 x 0.375 .375 63VDC 1.247 0.0041 0.488 0.183 x 0.5 .500 63VDC 0.829 0.0100 0.486 0.243 x 0.75 .750 63VDC 0.466 0.0281 0.378 0.284 x 1 001. 63VDC 0.310 0.0593 0.351 x 1.25 1.25 63VDC 0.200 0.0510 0.365 0.456 x 1.5 01.5 63VDC 0.174 0.0902 0.368 0.552 x 1.75 1.75 63VDC 1.405 0.1440 0.360 0.540 x 2 002. 32 50A @ 32VDC/12VAC 0.051 0.1490 0.107 0.214 x 2.5 02.5 32 0.0324 0.1977 0.095 0.238 x 3 003. 32 0.0255 0.2922 0.093 0.279 x 3.5 03.5 32 0.0205 0.4752 0.082 0.287 x 4 004. 32 0.0170 0.6920 0.079 0.316 x 5 005. 32 0.0115 0.7398 0.074 0.370 x 6 006. 24 50A @ 24VDC/12VAC 0.0085 1.3838 0.072 0.432 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. Nominal Melting It measured at 1 msec. opening time. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized. RoHS Pb Handheld Electronics LCD Displays Battery Packs Hard Disk Drives SD Memory Cards 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 Re-rating Curve"for additional re-rating information. Devices designed to be mounted with marking code facing up. Specifications are subject to change without notice. Application testing is strongly recommended. Additional Information Datasheet Samples Resources

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