456 LITTELFUSE | Alldatasheet
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Technical content
Features
% of Ampere Rating Opening Time 100% 4 hours, Minimum 200% 60 seconds, Maximum Electrical Specifications Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I2t (A2 Sec.) Nom Voltage Drop (mV) Agency Approvals PS E 20 020. 125 100A @125V AC 300A @ 65V AC 300A @ 100V DC 1000A @ 32V DC 0.00230 18 64.7 x x 30 030. 125 100A @ 125V AC 300A @ 65V AC 1000A @ 32V DC 0.00132 81 69.9 x x 40 040. 60 600A @ 60V DC 0.00105 454 55 x
Applications
t $PPMJOHGBOTZTUFNGPS PC server t 4UPSBHFTZTUFNQPXFS t #BTFTUBUJPOQPXFS TVQQMZ t "VUPNPUJWF t 4VSGBDFNPVOUIJHI current fuse t 'VMMZDPNQBUJCMF XJUIMFBEGSFFTPMEFS BMMPZTBOEIJHIFS temperature profiles BTTPDJBUFEXJUIMFBE GSFFBTTFNCMZ t 3P)4DPNQMJBOUBOE Halogen Free t "WBJMBCMFJOSBUJOHTPG 20 to 40 Amperes PS E Notes: 1. Cold resistance measured at less than 10% of rated current at 23°C. 2. Agency Approval Table Key: X=Approved or Certified, P=Pending. 3. I 2t values stated for 10 msec opening time. Revised: September 21, 2009
Introduction to Circuit ProtectionIntroduction to Circuit Protection Transientology 66 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Surface Mount Fuses
456 Series
NANO2® > 456 Series Please refer to www.littelfuse.com/series/456.html for current information. Average Time Current CurvesT emperature Rerating Curve PERCENT OF UPRATING PERCENT OF DOWNUPRATING AMBIENT TEMPERATURE 120°C 264°F 0 0 Soldering Parameters – Reflow Soldering Reflow Condition 1Co'SFFBTTFNCMZ Pre Heat - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) oTFDT Average ramp up rate (Liquidus Temp (TL) to peak 5°C/second max. TS(max) to TL - Ramp-up Rate 5°C/second max. Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) oTFDPOET Peak Temperature (TP) 250 Time within 5°C of actual peak Temperature (tp) oTFDPOET Ramp-down Rate 5°C/second max. Time 25°C to peak Temperature (TP) 8 minutes max. Do not exceed 260°C Time Temperature TP TL TS(max) TS(min) tP tL tS time to peak temperature (t 25ºC to peak) Ramp-down Ramp-up Preheat Critical Zone TL to TP 0.01 0.1 100 1 10 100 1000 TIME IN SECONDS CURRENT IN AMPERES 40A 30A 20A
67© 2009 Littelfuse, Inc. Specifications are subject to change without notice. Surface Mount Fuses NANO2® > 456 Series Please refer to www.littelfuse.com/series/456.html for current information. Operating Temperature OC to 125O$XJUIQSPQFSEFSBUJOH Thermal Shock .*-45%' .FUIPE( 5FTU$POEJUJPO# DZDMFT OC to 125OC) Vibration .*-45%' .FUIPE" Moisture Sensitivity Level -FWFM+45%$ Moisture Resistance .*-45%'.FUIPE )JHI)VNJEJUZ 3) Heat (65 OC) Salt Spray .*-45%' .FUIPE% 5FTU$POEJUJPO# Mechanical Shock .*-45% .FUIPE 5FTU$POEJUJPO* (TQFBLGPS milliseconds) Product Characteristics Dimensions Part Numbering System Packaging Rating Packaging Option Packaging Specification Quantity Quantity & Packaging Code 20A, 30A NN5BQFBOE3FFM &*"34 2500 &3 QBSU 1500 %3 Materials #PEZ$FSBNJD $BQ4JMWFS1MBUFE#SBTT Product Marking #PEZ#SBOE-PHP $VSSFOU3BUJOH Insulation Resistance .*-45% NFUIPE 5FTU Condition A (10,000 ohms, Minimum) Solderability .*-45% .FUIPE Resistance to Soldering Heat .*-45% .FUIPE 5FTU$POEJUJPO# TFDBUOC) PCB Recommendation for Thermal Management .JODPQQFSMBZFSUIJDLOFTT .JODPQQFSUSBDFXJEUI 10mm (20A, 30A) / 15mm (40A) Alternate methods of thermal manage NFOUNBZCFVTFE*OTVDIDBTFT under normal operations, the maxi NVNUFNQFSBUVSFPGUIFGVTFCPEZ should not exceed 80 OC in a 25OC environment. 10.10 (.397”) 3.120 (.123”) 12.50 (.492) 4.445 (.175”) 4.445 (.175”) Recommended Pad Layout Recommended Pad Layout 2.173 (.086”)2.79 (.110”) 0.30 (.012”) 3.79 (.149”) 5.72 (.225”) 13.3 (.524”) 5.65 (.222”) 3.120 [.123”] 1.70 typ (0.067”) 3.25 (.128”) 3.43 (.135”) 12.60 (.496”) 6.10 (.240”)20 A
20 A, 30A:
40A: F 40 AF 0456 020. E R SERIES AMP Code QUANTITY Code PACKAGING Code 3FGFSUP&MFDUSJDBM DIBSBDUFSJTUJDTUBCMF QDT QDT 5BQFBOE3FFM
Introduction to Circuit ProtectionIntroduction to Circuit Protection Transientology 68 © 2009 Littelfuse, Inc. Specifications are subject to change without notice.