Surface Mount Fuses NANO2® > Slo-Blo® > 452/454 Series 452/454 Series Fuse PS E Description The NANO2 Slo-Blo® fuse has enhanced inrush withstand characteristics over the NANO2 Fast-Acting fuse. The unique time delay feature of this fuse design helps solve the problem of nuisance “opening” by accommodating inrush currents that normally cause a fast-acting fuse to open. t 5JNF-BH4MP#MP t 4NBMMTJ[F t 8JEFSBOHFPGDVSSFOU SBUJOHBWBJMBCMFN" UP" t 8JEFPQFSBUJOH temperature range Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 375mA - 12A LR29862 375mA - 12A NBK030205-E10480B 1A - 5A PS E Opening Time 100% 4 hours, Minimum 200% 1 sec., Min.; 60 sec., Max. TFD.JOTFD.BY 800% 0.02 sec., Min.; 0.1 sec., Max. t -PXUFNQFSBUVSF de-rating t 3P)4DPNQMJBOU t )BMPHFO'SFF Applications t t t t t t t t t t t Electrical Characteristics for Series % of Ampere Rating 452/454 Series Features /PUFCPPL1$ -$%1%157 -$%NPOJUPS -$%1%1QBOFM -$%CBDLMJHIUJOWFSUFS 1PSUBCMF%7%QMBZFS 1PXFSTVQQMZ /FUXPSLJOH 1$TFSWFS $PPMJOHGBOTZTUFN 4UPSBHFTZTUFN t t t t t 5FMFDPNTZTUFN 8JSFMFTTCBTFTUBUJPO 8IJUFHPPET (BNFDPOTPMF 0GåDF"VUPNBUJPO equipment #BUUFSZDIBSHJOHDJSDVJU protection *OEVTUSJBMFRVJQNFOU .FEJDBMFRVJQNFOU "VUPNPUJWF t t t t Electrical Specifications by Item Ampere Rating (A) Amp Code Max Voltage Rating (V) Nominal Cold Resistance (Ohms) Interrupting Rating Agency Approvals Nominal Melting I2t (A2sec) PS E 1.2000 0.101 x x 0.240 x x 0.904 x x 001. 001. 1.98 x x x x x x 2.00 002. 20.16 x x x 0.0224 x x x BNQFSFT!7"$7%$ BNQFSFT!7%$ 14&BNQFSFT!7"$ 8.20 x x x x x x 4.00 004. 0.0186 x x x x x x x x 8 008. 12 012. BNQFSFT!7"$ BNQFSFT!7%$ BNQFSFT!7"$ BNQFSFT!7%$ 0.0088 x x 0.0061 260.46 x x Notes: - l2t calculated at 8ms. - Resistance is measured at 10% of rated current, 25ºC © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/452.html or /454.html for current information. 61 Revised: May 3, 2011 452/454 Series Mount Fuses IntroductionSurface to Circuit Protection Transientology NANO2® > Slo-Blo® > 452/454 Series Temperature Rerating Curve Average Time Current Curves 12.0A 8.00A 7.00A 5.00A 4.00A 3.50A 3.00A 2.50A 2.00A 1.50A 1.00A 750mA 500mA 375mA TIME IN SECONDS 100 10 1 Note: %FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSEEFSBUJOHPGGPS continuous operation. 0.1 0.01 0.1 1 10 100 1000 CURRENT IN AMPS Soldering Parameters Pre Heat Pb – Free assembly ¡$ - Temperature Max (Ts(max)) ¡$ - Time (Min to Max) (ts) 60 – 120 secs ¡$TFDPOENBY TS(max) to TL - Ramp-up Rate ¡$TFDPOENBY - Temperature (TL) (Liquidus) ¡$ - Temperature (tL) 60 – 90 seconds Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds Ramp-down Rate ¡$TFDPOENBY Time 25°C to peak Temperature (TP) 8 minutes max. Do not exceed ¡$ Wave Soldering Parameters ¡$1FBL Temperature, TFDPOETNBY 452/454 Series TL TS(max) tL Ramp-down TS(min) Preheat tS 25 Peak Temperature (TP) Critical Zone TL to TP Ramp-up - Temperature Min (Ts(min)) Average ramp up rate (Liquidus Temp (TL) to peak Reflow tP TP Temperature Reflow Condition time to peak temperature (t 25ºC to peak) Time ¡$ 62 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/452.html or /454.html for current information. Surface Mount Fuses NANO2® > Slo-Blo® > 452/454 Series Materials #PEZ$FSBNJD 5FSNJOBUJPOT(PMEQMBUFE$BQT 4JMWFSQMBUFE$BQT Product Marking #SBOE"NQFSF3BUJOH Operating Temperature ¡$UP¡$ Moisture Sensitivity Level -FWFM+45%$ Solderability .*-45%.FUIPE Insulation Resistance (after Opening) .*-45%.FUIPE5FTU$POEJUJPO "PINTNJOJNVN Thermal Shock .*-45%.FUIPE5FTU $POEJUJPO#DZDMFT¡$ ¡$NJOVUFT!FBDIFYUSFNF Mechanical Shock .*-45%.FUIPE5FTU* %FFOFSHJ[FE(TQLBNQMJUVEF TBXUPPUIXBWFNTEVSBUJPO DZDMFT9:;YZ[TIPDLT Vibration .*-45%.FUIPEw BNQMJUVEF)[JONJOIST FBDI9:;IST Moisture Resistance .*-45%.FUIPEDZDMFT Salt Spray .*-45%.FUIPE5FTU $POEJUJPO#IST Resistance to Soldering Heat .*-45%.FUIPE5FTU DPOEJUJPO#TFDBU¡$ Part Numbering System Dimensions 0452 001. M R L 6.10 (.240") SERIES F T 1A 1.45 (.057") AMP Code 3FGFSUP"NQ$PEFDPMVNOJOUIF &MFDUSJDBM4QFDJåDBUJPOTUBCMF The dot is positioned at the end of the number sequence with whole ratings and within for fractional ratings. Example:"NQQSPEVDUJT .375.3-BNQQSPEVDUTIPXO 2.69 (.106") 2.69 (.106") QUANTITY Code .QDT /QDT 6.86 (.270") PACKAGING Code 35BQFBOE3FFM 3.15 (.124") RoHS Compliant & Halogen Free 2.95 1.96 (.116") (.077") Recommended pad layout NOTE: “L” suffix applies to 452 series only TFSJFT NBZ CF PSEFSFE BT FJUIFS i3P)4 BOE )'w i-w TVGåY PS OPO3P)4 OP TVGåY WFSTJPO TFSJFTJTBWBJMBCMFPOMZBTi3P)4BOE)'wWFSTJPOBOEEPFTOPUSFRVJSFi-wTVGåY 1MFBTFEPOPUJODMVEFi-wTVGåYXJUIJOTFSJFTPSEFSJOHJOTUSVDUJPOT Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code NN5BQFBOE3FFM &*"34*&$QBSU /3 NN5BQFBOE3FFM &*"34*&$QBSU 1000 .3 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/452.html or /454.html for current information. 63 452/454 Series 452/454 Series Product Characteristics