Surface Mount Fuses 2 NANO > Fast Acting Fuse > 456SD Series RoHS 456SD Series Fuse Description 2 The High Current NANO Fuse is a small square surface mount fuse that is designed to support higher current requirements of various applications. Features Available in ratings of 40 High inrush/surge to 50A current withstand capability High interrupting rating - 600A 75VDC Surface mountable high current fuse Very low cold resistance, temperature rise, and UL 248-1 and UL 248-14 Agency Approvals voltage drop recognized AGENCY AGENCY FILE NUMBER AMPERE RATING Benefits E10480 40A 50A Single fuse solution for Avoids nuisance opening high current application due to high inrush and surge current inherent in Electrical Characteristics Suitable for a wide the system variety of voltage % of requirement and Compatible with high Opening Time Ampere Rating application volume assembly 100% 4 hours, Minimum requirements Enhances power 200% 60 seconds, Maximum efficiency Additional Information Applications Voltage regulator module Basestation power for PC server supply Cooling fan system for Power tools Datasheet Resources Samples PC server Storage system power Electrical Specifications Max Agency Approvals Ampere Nominal Nominal Nom Voltage Voltage Interrupting Rating Amp Code Cold Resistance Melting Drop Rating Rating 2 2 (A) (Ohms) I t (A Sec.) (mV) (V) 100A 125VAC 40 040. 125 0.00130 1700 110 x 600A 75VDC 100A 125VAC 50 050. 125 0.00105 2700 115 x 600A 75VDC Notes: 1. Cold resistance measured at less than 10% of rated current at 23C. 2. Agency Approval Table Key: X = Approved or Certified, P = Pending. 2 3. I t values stated for 1 msec opening time. 2019 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: April 1, 2019 9:40 AM Surface Mount Fuses 2 NANO > Fast Acting Fuse > 456SD Series Temperature Re-rating Curve Average Time Current Curves 60 1000 40 20 100 0 0 20 10 40 60 1 -60C -40C -20C 0C 20C 40C 60C 80C 100C 120C 140C -76F -40F -4F 32F 68F 104F 140F 176F 212F 248F 264F AMBIENT TEMPERATURE 0.1 Note: Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.01 0.001 110100 1000 Current in Amperes Soldering Parameters Reflow Soldering t Reflow Condition Pb-free assembly P 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 secs s Ramp-down Average ramp up rate (Liquidus Temp Preheat 5C/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 20 40 seconds Temperature (t ) p Ramp-down Rate 5C/second max. Time 25C to peak Temperature (T ) 8 minutes max. P Do not exceed 260C 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: April 1, 2019 9:40 AM PERCENT OF UPRATING PERCENT OF DOWNUPRATING Opening in Seconds 40A 50A Temperature