043803.5WRGT Littelfuse

Surface Mount Fuses Datasheet 438GT Series 0603 Fast-Acting Fuse RoHS Pb Description The 438GT 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. Features Operating Temperature from Suitable for both leaded -55C to +150C and lead-free reflow/ wave soldering 100% Lead-free, RoHS compliant and Halogen- Recognized to UL/CSA/NMX free 248-1 and UL/CSA/NMX 248- 14 Additional Information Applications Handheld Electronics Hard Disk Drives SD Memory Cards LCD Displays B atter y Packs Resources Accessories Samples Agency Approvals Electrical Characteristics for Series % of Ampere Agency Agency File Number Ampere Range Ampere Rating Opening Time at 25C Rating 100% 2A 6A 4 Hours, Minimum E10480 2A 6A 250% 2A 6A 5 Seconds, Maximum 29862 2A 6A Electrical Specifications by Item Agency Approvals Ampere Max. Nominal Nominal Nominal Voltage Nominal Power Amp Interrupting Rating 2 Rating Voltage Resistance Melting I t Drop At Rated Dissipation At Rated 1 Code (AC/DC) 2 2 3 4 (A) Rating (V) (Ohms) (A Sec.) Current (V) Current (W) 2 002. 32 0.0490 0.181 0.110 0.220 x x 2.5 02.5 32 0.0364 0.240 0.094 0.235 x x 3 003. 32 0.0264 0.439 0.082 0.246 x x 50A 32VDC/12VAC 3.5 03.5 32 0.0210 0.647 0.078 0.273 x x 4 004. 32 0.0164 0.739 0.075 0.300 x x 5 005. 32 0.0127 0.747 0.072 0.360 x x 6 006. 24 50A 24VDC/12VAC 0.0086 1.444 0.070 0.420 x x 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 1msec. 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 Re-rating Curvefor additional re-rating information. Devices designed to be mounted with marking code facing up. 2021 Littelfuse, Inc. 1 Specifications are subject to change without notice. Revised: GD. 02/22/21Surface Mount Fuses Datasheet 438GT Series 0603 Fast-Acting Fuse Temperature Re-rating Curve Average Time Current Curves 140 100 120 100 10 80 60 1 40 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (C) 0.1 Note: 1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. Example: For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: I = (0.80)(0.85)I = (0.68)I RAT RAT 0.01 0.001 0.11 10 100 CURRENT IN AMPERES Soldering Parameters Reflow Condition Pb free assembly t P - Temperature Min (T ) 150C s(min) T P Critical Zone Pre Heat - Temperature Max (T ) 200C Ramp-up s(max) TL to TP - Time (Min to Max) (t ) 60 180 seconds s T L Average Ramp-up Rate (Liquidus Temp (T ) to peak) 3C/second max. L t L T S(max) T to T - Ramp-up Rate 5C/second max. S(max) L - Temperature (T ) (Liquidus) 217C L Ramp-down Reflow - Temperature (t ) 60 150 seconds Preheat L T +0/-5 S(min) Peak Temperature (T ) 260 C P t S Time within 5C of actual peak Temperature (t ) 10 30 seconds p Ramp-down Rate 6C/second max. 25 Time 25C to peak Temperature (T ) 8 minutes max. P time to peak temperature Time Do not exceed 260C (t 25C to peak) Wave Soldering 260C, 10 seconds max. 2021 Littelfuse, Inc. 2 Specifications are subject to change without notice. Revised: GD. 02/22/21 PERCENT OF RATING TIME IN SECONDS 2A 2.5A 3A 3.5A 4A 5A 6A Temperature