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