Surface Mount Fuses Ceramic Fuse > 501 Series RoHS Pb 501 Series High Current 1206 Fast-Acting Fuse Description The 501 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. 2 The high I t values which is typical in the Littelfuse Ceramic Fuse family, ensure high inrush current withstand capability. Features Operating Temperature 100% Lead-free, RoHS from -55C to +150C compliant and Halogen- free Designed to provide Agency Approvals over-current protection Suitable for both leaded in high current voltage and lead-free reflow / AGENCY AGENCY FILE NUMBER AMPERE RANGE regulator module (VRM) wave soldering applications E10480 10A - 20A 29862 10A - 20A Applications Voltage Regulator Notebook PC Module (VRM) DC-DC Converter Equipment Electrical Characteristics for Series % of Ampere Additional Information Ampere Rating Opening Time at 25C Rating 100% 10A 20A 4 Hours, Minimum 350% 10A 20A 5 Seconds, Maximum Datasheet Samples Resources Electrical Specifications by Item Agency Approvals Ampere Max. Voltage Interrupting Nominal Nominal Nominal Voltage Nominal Power Amp 2 Rating Rating Rating Resistance Melting I T Drop At Rated Dissipation At Code 1 2 2 3 4 (A) (V) (DC) (Ohms) (A Sec.) Current (V) Rated Current (W) 10 010. 32 0.00362 10.385 0.04407 0.4407 x x 12 012. 32 0.00311 20.341 0.04927 0.5912 x x 150 A 32 VDC 15 015. 32 0.00250 39.700 0.04843 0.7265 x x 20 020. 32 0.00194 86.360 0.05888 1.1776 x x Notes: Devices designed to carry rated current for 4 hours minimum. It is recommended that 1. DC Interrupting Rating tested at rated voltage with time constant < 0.5 msec. devices be operated continuously at no more than 80% rated current. See Temperature 2. Nominal Resistance measured with < 10% rated current. Re-rating Curvefor additional re-rating information. 2 2 3. Nominal Melting I t measured at 1 msec. opening time. For other I t data refer to chart. Devices designed to be mounted with marking code facing up. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized and with fuse mounted on board with 3-oz Cu trace. 2017 Littelfuse, Inc. Specifications are subject to change without notice. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 12/14/17Surface Mount Fuses Ceramic Fuse > 501 Series Temperature Re-rating Curve Average Time Current Curves 140 100.000 120 100 10.000 80 60 1.000 40 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (C) 0.100 Note: 1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. 0.010 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 0.001 110 100 1000 CURRENT IN AMPERES Soldering Parameters t P Reflow Condition Pb free assembly T P Critical Zone Ramp-up T to T L P - Temperature Min (T ) 150C s(min) T L Pre Heat - Temperature Max (T ) 200C t s(max) L T S(max) - Time (Min to Max) (t ) 60 180 seconds s Ramp-down Average Ramp-up Rate (Liquidus Temp Preheat 3C/second max. (T ) to peak) T L S(min) t S T to T - Ramp-up Rate 5C/second max. S(max) L - Temperature (T ) (Liquidus) 217C L 25 Reflow time to peak temperature - Temperature (t ) 60 150 seconds L Time (t 25C to peak) +0/-5 Peak Temperature (T ) 260 C P Time within 5C of actual peak 10 30 seconds Temperature (t ) p Ramp-down Rate 6C/second max. Time 25C to peak Temperature (T ) 8 minutes max. P Do not exceed 260C Wave Soldering 260C, 10 seconds max. 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/14/17 PERCENT OF RATING TIME IN SECONDS 10A 12A 15A 20A Temperature