Surface Mount Fuses NANO2® > 250V > Time Lag > 443 Series 443 Series Fuse Description 5IF7/BOP'VTFJTBTNBMMTRVBSFTVSGBDFNPVOU GVTFUIBUJTEFTJHOFEUPFOBCMFDPNQMJBODFXJUIUIF3P)4 EJSFDUJWF5IJTQSPEVDUJTGVMMZDPNQBUJCMFXJUIMFBEGSFF TPMEFSBMMPZBOEIJHIFSUFNQFSBUVSFQSPåMFTBTTPDJBUFE XJUIMFBEGSFFBTTFNCMZ t 7"$WPMUBHFSBUJOH t 5JNF-BH t "WBJMBCMF"o " Agency Approvals t 3P)4$PNQMJBOU AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 0.500A - 5.00A Applications t "$%$QPXFSBEBQUPS t 5FMFDPNFRVJQNFOU TZTUFNQPXFS Electrical Characteristics for Series % of Ampere Rating t 1PSUBCMFTZTUFNCVJMU JO"$%$DPOWFSUFS Opening Time IPVST.JOJNVN TFDPOET.BYJNVN t 'VMMZDPNQBUJCMF XJUIMFBEGSFFTPMEFS BMMPZTBOEIJHIFS UFNQFSBUVSFQSPåMFT BTTPDJBUFEXJUIMFBE GSFFBTTFNCMZ t )JHIWPMUBHF%$%$ DPOWFSUFS t -JHIUJOH4ZTUFN t -&%-JHIUJOH Electrical Specifications by Item Ampere Rating (A) Amp Code Max Voltage Rating (V) Agency Approvals Nominal Melting It (A2sec) Nominal Voltage Drop (mV) 448 Y Y Nominal Cold Resistance (Ohms) Interrupting Rating 1 Y Y Y Y "!7"$ Y 98 Y 4 81 Y Y 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 and Blank=Not Approved 3. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options. © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/443.html for current information. 73 Revised: March 17, 2009 443 Series 443 Series Features Mount Fuses IntroductionSurface to Circuit Protection NANO2® > 250V > Time LagTransientology > 443 Series Average Time Current Curves 0.50 A 0.75 A 1.00 A 1.50 A 2.00 A 2.50 A 3.00 A 3.50 A 4.00 A 5.00 A Temperature Rerating Curve 100 TIME IN SECONDS 10 1 0.1 /PUF 0.01 %FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSEEFSBUJOHPGGPS DPOUJOVPVTPQFSBUJPO 0.001 0.1 1 10 100 1000 CURRENT IN AMPS Soldering Parameters Pre Heat 1Co'SFFBTTFNCMZ ¡$ - Temperature Max (Ts(max)) ¡$ - Time (Min to Max) (ts) oTFDT TL TS(max) ¡$TFDPOENBY TS(max) to TL - Ramp-up Rate ¡$TFDPOENBY - Temperature (TL) (Liquidus) ¡$ - Temperature (tL) oTFDPOET Time within 5°C of actual peak Temperature (tp) oTFDPOET Ramp-down Rate ¡$TFDPOENBY Time 25°C to peak Temperature (TP) NJOVUFTNBY Do not exceed ¡$ Wave Soldering Parameters ¡$1FBL 5FNQFSBUVSF TFDPOETNBY 443 Series tL Ramp-down TS(min) Preheat tS 25 Peak Temperature (TP) Critical Zone TL to TP Ramp-up - Temperature Min (Ts(min)) Average ramp up rate (Liquidus Temp (TL) to peak Reflow tP TP Temperature Reflow Condition time to peak temperature (t 25ºC to peak) Time ¡$ 74 Revised: March 17, 2009 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/443.html for current information. Surface Mount Fuses NANO2® > 250V > Time Lag > 443 Series Materials #PEZ$FSBNJD $BQ4JMWFS1MBUFE#SBTT Operating Temperature o0$UP0$XJUIQSPQFSEFSBUJOH Thermal Shock Product Marking #PEZ#SBOE-PHP$VSSFOU3BUJOH 3BUFE7PMUBHF5$ $IBSBDUFSJTUJDi5w .*-45%'.FUIPE( 5FTU$POEJUJPO#DZDMFTP$ UPP$ Vibration .*-45%'.FUIPE" )[ Moisture Resistance .*-45%.FUIPE )JHI)VNJEJUZ3) )FBU P$ Salt Spray .*-45%'.FUIPE 5FTU$POEJUJPO# Mechanical Shock .*-45%.FUIPE 5FTU$POEJUJPO*(TQFBLGPS NJMMJTFDPOET Insulation Resistance .*-45%.FUIPE 5FTU$POEJUJPO"PINT BGUFS0QFOJOH .JOJNVN Solderability .*-45%.FUIPE Resistance to Soldering Heat .*-45%.FUIPE 5FTU$POEJUJPO#TFDBUP$ Moisture Sensitivity Level -FWFM+45%$ .JODPQQFSMBZFSUIJDLOFTTVN .JODPQQFSUSBDFXJEUINN PCB Recommendation for Thermal Management "MUFSOBUFNFUIPETPGUIFSNBMNBOBHF NFOUNBZCFVTFE*OTVDIDBTFT VOEFSOPSNBMPQFSBUJPOTUIFNBYJNVN UFNQFSBUVSFPGUIFGVTFCPEZTIPVME OPUFYDFFE0$JOB0$BNCJFOU FOWJSPONFOU Part Numbering System Dimensions 3.25 (.128") 10.10 (.397") 5A T AC250V 3.12 (.123") 3.12 (.123") 6.10 (.240") 0443 .500 D R SERIES 3.43 (.135") AMP Code 3FGFSUP&MFDUSJDBM DIBSBDUFSJTUJDTUBCMF 12.6 (.496") 1.70 typ (.067") QUANTITY Code Recommended Pad Layout %QDT PACKAGING Code 35BQFBOE3FFM Example: BNQQSPEVDUJT 01.5 %3BNQ QSPEVDUTIPXOBCPWF Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code NN5BQFBOE3FFM &*"34*&$QBSU %3 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/443.html for current information. 75 Revised: March 17, 2009 443 Series 443 Series Product Characteristics Introduction to Circuit Protection Transientology 76 Revised: March 17, 2009 © 2009 Littelfuse, Inc. Specifications are subject to change without notice.