Surface Mount Fuses Ceramic Fuse > 501 Series 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 150°C. The high I2t values which is typical in the Littelfuse Ceramic Fuse family, ensure high inrush current withstand capability. Agency Approvals AGENCY Features AGENCY FILE NUMBER AMPERE RANGE E10480 10A - 20A LR29862 10A - 20A t 0QFSBUJOH5FNQFSBUVSF from -55ºC to +150ºC t %FTJHOFEUPQSPWJEF over-current protection in high current voltage regulator module (VRM) applications t -FBEGSFF3P)4 compliant and Halogenfree t 4VJUBCMFGPSCPUIMFBEFE and lead-free reflow / wave soldering Applications Electrical Characteristics for Series % of Ampere Rating Ampere Rating 100% 10A – 20A 4 Hours, Minimum 350% 10A – 20A 5 Seconds, Maximum t 7PMUBHF3FHVMBUPS Module (VRM) Equipment Opening Time at 25ºC t /PUFCPPL1$ t %$%$$POWFSUFS Electrical Specifications by Item Ampere Rating (A) Amp Code Max. Voltage Rating (V) Interrupting Rating (DC)1 Nominal Nominal Resistance Melting I2T 2 (Ohms) (A2Sec.)3 Nominal Voltage Drop At Rated Current (V)4 Nominal Power Agency Approvals Dissipation At Rated Current (W) 10 010. 24 0.00427 10.385 0.05679 0.5679 x 12 012. 24 0.00321 20.341 0.04891 0.5870 x x 15 015. 24 0.00250 36.100 0.04605 0.6908 x x 20 020. 24 0.00200 54.760 0.05936 1.1871 x x "!7%$ x /PUFT %FWJDFTEFTJHOFEUPDBSSZSBUFEDVSSFOUGPSIPVSTNJOJNVN*UJTSFDPNNFOEFEUIBU devices be operated continuously at no more than 80% rated current. See “Temperature Rerating Curve”for additional rerating information. %$*OUFSSVQUJOH3BUJOHUFTUFEBUSBUFEWPMUBHFXJUIUJNFDPOTUBOUNTFD /PNJOBM3FTJTUBODFNFBTVSFEXJUISBUFEDVSSFOU /PNJOBM.FMUJOH*2t measured at 1 msec. opening time. For other I2t data refer to chart. %FWJDFTEFTJHOFEUPCFNPVOUFEXJUINBSLJOHDPEFGBDJOHVQ /PNJOBM7PMUBHF%SPQNFBTVSFEBUSBUFEDVSSFOUBGUFSUFNQFSBUVSFIBTTUBCJMJ[FEBOE XJUIGVTFNPVOUFEPOCPBSEXJUIP[$VUSBDF © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/501.html for current information. 25 Revised: August 25, 2009 501 Series 501 Series The general design ensures excellent temperature stability and performance reliability. Mount Fuses IntroductionSurface to Circuit Protection Ceramic FuseTransientology > 501 Series Temperature Rerating Curve Average Time Current Curves PERCENT OF RATING 140 120 100 80 60 40 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (°C) /PUF 1. Rerating depicted in this curve is in addition to the standard rerating of 20% for continuous operation. &YBNQMF 'PSDPOUJOVPVTPQFSBUJPOBUEFHSFFTDFMTJVTUIFGVTFTIPVMECFSFSBUFEBTGPMMPXT I = (0.80)(0.85)IRAT = (0.68)IRAT Soldering Parameters Reflow Condition - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 seconds Average Ramp-up Rate (Liquidus Temp (TL) to peak) 3°C/second max. TS(max) to TL - Ramp-up Rate 5°C/second max. Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds Peak Temperature (TP) 260+0/-5 °C Time within 5°C of actual peak Temperature (tp) 10 – 30 seconds Ramp-down Rate 6°C/second max. Time 25°C to peak Temperature (TP) 8 minutes max. Do not exceed 260°C Wave Soldering 501 Series tP TP Critical Zone TL to TP Ramp-up TL TS(max) Temperature Pre Heat 1CoGSFFBTTFNCMZ tL Ramp-down TS(min) Preheat tS 25 time to peak temperature (t 25ºC to peak) Time 260°C, 10 seconds max. 26 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/501.html for current information. Surface Mount Fuses Ceramic Fuse > 501 Series Product Characteristics Body: Advanced Ceramic Terminations: "H/J4O-FBEGSFF Element Cover Coating: Lead-free Glass Materials Moisture *1$+&%&$+45%$-FWFM Sensitivity Level Moisture Resistance .*-45%.FUIPE( Thermal Shock .*-45%.FUIPE( $POEJUJPO# Mechanical Shock .*-45%.FUIPE# Condition A Vibration .*-45%.FUIPE" Vibration, High Frequency .*-45%.FUIPE% $POEJUJPO% *1$&$"+&%&$+45%$$POEJUJPO# Humidity Test .*-45%.FUIPE#$POEJUJPOT% ESD Immunity *&$L7%JSFDU *1$&$"+&%&$+45%$ $POEJUJPO% Resistance to Solvents Dissolution of Metallization .*-45%.FUIPE'$POEJUJPO# Terminal Strength IEC 60127-4 Dimensions 501 Series Solderability Part Marking System 3.200 ± .1778 [.126 ± .007] Amp Code 20 1.000 [.039] 1.63 +.10/-.20 [.064 +.004/-.008] Marking Code 010. 10 012. 12 015. 15 020. 20 .8179 +.046/-.076 [.0322 +.0018/-.003] TERMINATION Part Numbering System 0501 020. W R SERIES PACKING CODE .520 ± .200 [.020 ± .008] 1.000 [.039] 33FFM1BDL AMP CODE 1.500 [.059] QUANTITY CODE W = 3000 pcs 1.800 [.071] 3.500 [.138] Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA-481-1 (IEC 286, part 3) 3000 WR © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/501.html for current information. 27 501 Series Introduction to Circuit Protection Transientology 28 © 2009 Littelfuse, Inc. Specifications are subject to change without notice.