Surface Mount Fuses 2 NANO > Very Fast Acting Fuse > 456 Series PS RoHS E 456 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. 40A Features Surface mount high Available in ratings of 20 20A, 25A, 30A current fuse to 40 Amperes Fully compatible with UL Recognized UL/CSA/ lead-free solder alloys NMX 248-1 and UL/CSA/ and higher temperature NMX 248-14 profiles associated with Conforms to EN 60127-1 lead-free assembly and EN 60127-7 RoHS compliant and Conforms to DENANs Agency Approvals Halogen Free Appendix 3 Agency Agency File Number Ampere Rating Applications E10480 20A - 40A Voltage regulator module Basestation power J50446929 20A - 40A for PC server supply PS NBK030308-JP1021 20A - 30A E Cooling fan system for 29862 20A - 40A PC server Storage system power Electrical Characteristics Additional Information % of Opening Time Ampere Rating 100% 4 hours, Minimum 200% 60 seconds, Maximum Datasheet Resources Samples Electrical Specifications Agency Approvals Max Nominal Nominal Ampere Interrupting Nom Voltage Amp Code Voltage Cold Resistance Melting PS Rating (A) Rating Drop (mV) 2 2 E Rating (V) (Ohms) I t (A Sec.) 100A 125VAC 300A 65VAC 20 020. 125 300A 100VDC 0.00230 18 64.7 x x x x 1000A 32VDC 500A 72VDC 100A 125VAC 300A 65VAC 25 025. 125 0.00192 45 68.38 x x x x 500A 72VDC 1000A 32VDC 100A 125VAC 300A 65VAC 30 030. 125 0.00132 81 69.9 x x x x 1000A 32VDC 500A 72VDC 180A 72VDC 40 040. 72 0.00105 191 55 x x - x 600A 60VDC 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. Revised: 11/22/19Surface Mount Fuses 2 NANO > Very Fast Acting Fuse > 456 Series Temperature Re-rating Curve Average Time Current Curves 60 1000 40 20 100 0 0 20 40 10 60 -60C -40C -20C 0C 20C 40C 60C 80C 100C 120C 140C -76F -40F -4F 32F 68F 104F 140F 176F 212F 248F 264F AMBIENT TEMPERATURE 1 Note: 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.1 0.01 1 10 100 1000 CURRENT IN AMPS Soldering Parameters Reflow Soldering Reflow Condition Pb Free assembly t P - Temperature Min (T ) 150C T s(min) P Critical Zone Ramp-up T to T L P Pre Heat - Temperature Max (T ) 200C s(max) T - Time (Min to Max) (t ) 60 180 secs L s t L T Average ramp up rate (Liquidus Temp (T ) to peak 5C/second max. S(max) L T to T - Ramp-up Rate 5C/second max. S(max) L Ramp-down Preheat - Temperature (T ) (Liquidus) 217C L T Reflow S(min) - Temperature (t ) 60 150 seconds t L S +0/5 Peak Temperature (T ) 260 C P 25 Time within 5C of actual peak Temperature (t ) 20 40 seconds p time to peak temperature Time (t 25C to peak) 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: 11/22/19 PERCENT OF UPRATING PERCENT OF DOWNUPRATING TIME IN SECONDS 20A 25A 30A 40A Temperature