443 LITTELFUSE | Alldatasheet

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Technical content

Features

t 7"$WPMUBHFSBUJOH t 5JNF-BH t "WBJMBCMF"o t 3P)4$PNQMJBOU t 'VMMZDPNQBUJCMF XJUIMFBEGSFFTPMEFS BMMPZTBOEIJHIFS UFNQFSBUVSFQSPåMFT BTTPDJBUFEXJUIMFBE GSFFBTTFNCMZ % of Ampere Rating Opening Time IPVST .JOJNVN TFDPOET .BYJNVN AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 0.500A - 5.00A Electrical Specifications by Item Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting It (A2sec) Nominal Voltage Drop (mV) Agency Approvals "!7"$ 448 Y Y 1 Y Y Y Y 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. 5IF7/BOP'VTFJTBTNBMMTRVBSFTVSGBDFNPVOU GVTFUIBUJTEFTJHOFEUPFOBCMFDPNQMJBODFXJUIUIF3P)4 EJSFDUJWF5IJTQSPEVDUJTGVMMZDPNQBUJCMFXJUIMFBEGSFF TPMEFSBMMPZBOEIJHIFSUFNQFSBUVSFQSPåMFTBTTPDJBUFE XJUIMFBEGSFFBTTFNCMZ

Applications

t "$%$QPXFSBEBQUPS t 5FMFDPNFRVJQNFOU TZTUFNQPXFS t 1PSUBCMFTZTUFNCVJMU JO"$%$DPOWFSUFS t )JHIWPMUBHF%$%$ DPOWFSUFS t -JHIUJOH4ZTUFN t -&%-JHIUJOH

Revised: March 17, 2009 Introduction to Circuit ProtectionIntroduction to Circuit Protection Transientology 74 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Surface Mount Fuses

443 Series

NANO2® > 250V > Time Lag > 443 Series Please refer to www.littelfuse.com/series/443.html for current information. Average Time Current Curves Reflow Condition 1Co'SFFBTTFNCMZ Pre Heat - Temperature Min (Ts(min)) ¡$ - Temperature Max (Ts(max)) ¡$ - Time (Min to Max) (ts) oTFDT Average ramp up rate (Liquidus Temp (TL) to peak ¡$TFDPOENBY TS(max) to TL - Ramp-up Rate ¡$TFDPOENBY Reflow - Temperature (TL) (Liquidus) ¡$ - Temperature (tL) oTFDPOET Peak Temperature (TP) Time within 5°C of actual peak Temperature (tp) oTFDPOET Ramp-down Rate ¡$TFDPOENBY Time 25°C to peak Temperature (TP) NJOVUFTNBY Do not exceed ¡$ Soldering Parameters T emperature Rerating Curve 0.001 0.01 0.1 100 0.1 1 10 100 1000 TIME IN SECONDS CURRENT IN AMPS 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 /PUF %FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSEEFSBUJOHPGGPS DPOUJOVPVTPQFSBUJPO Wave Soldering Parameters ¡$1FBL 5FNQFSBUVSF TFDPOETNBY 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

Revised: March 17, 2009 75© 2009 Littelfuse, Inc. Specifications are subject to change without notice. Surface Mount Fuses NANO2® > 250V > Time Lag > 443 Series Please refer to www.littelfuse.com/series/443.html for current information. Materials #PEZ$FSBNJD $BQ4JMWFS1MBUFE#SBTT Product Marking #PEZ#SBOE-PHP $VSSFOU3BUJOH 3BUFE7PMUBHF $IBSBDUFSJTUJDi5w Insulation Resistance BGUFS0QFOJOH .*-45% .FUIPE 5FTU$POEJUJPO" PINT .JOJNVN Solderability .*-45% .FUIPE Resistance to Soldering Heat .*-45% .FUIPE 5FTU$POEJUJPO# TFDBU Moisture Sensitivity Level -FWFM+45%$ PCB Recommendation for Thermal Management .JODPQQFSMBZFSUIJDLOFTT VN .JODPQQFSUSBDFXJEUI NN "MUFSOBUFNFUIPETPGUIFSNBMNBOBHF NFOUNBZCFVTFE*OTVDIDBTFT VOEFSOPSNBMPQFSBUJPOT UIFNBYJNVN UFNQFSBUVSFPGUIFGVTFCPEZTIPVME OPUFYDFFE 0$JOB0$BNCJFOU FOWJSPONFOU Product Characteristics 5A 3.12 (.123") 3.12 (.123") 10.10 (.397") 3.25 (.128") 3.43 (.135") 12.6 (.496") 6.10 (.240") Recommended Pad Layout1 .70 typ (.067") AC250V T Dimensions Packaging Part Numbering System Packaging Option Packaging Specification Quantity Quantity & Packaging Code QBSU Operating Temperature o0$UP0$XJUIQSPQFSEFSBUJOH Thermal Shock .*-45%' .FUIPE( 5FTU$POEJUJPO# DZDMFTP$ UP Vibration .*-45%' .FUIPE" Moisture Resistance .*-45% .FUIPE )JHI)VNJEJUZ 3) )FBU Salt Spray .*-45%' .FUIPE 5FTU$POEJUJPO# Mechanical Shock .*-45% .FUIPE 5FTU$POEJUJPO* (TQFBLGPS NJMMJTFDPOET 0443 .500 D R SERIES AMP Code QUANTITY Code PACKAGING Code 3FGFSUP&MFDUSJDBM DIBSBDUFSJTUJDTUBCMF QDT 5BQFBOE3FFM Example: BNQQSPEVDUJT 01.5 %3 BNQ QSPEVDUTIPXOBCPWF

Revised: March 17, 2009 Introduction to Circuit ProtectionIntroduction to Circuit Protection Transientology 76 © 2009 Littelfuse, Inc. Specifications are subject to change without notice.