Surface Mount Fuses NANO2® > Slo-Blo® > 449 Series 449 Series Fuse PS E Description Features Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 375mA - 5A NBK030205 1A - 5A PS E Opening Time 100% 4 hours, Minimum 200% 1 sec., Min.; 60 sec., Max. 300% 0.2 sec., Min.; 3 sec., Max 800% 0.02 sec., Min.; 0.1 sec., Max. t 8JEFPQFSBUJOH temperature range t -PXUFNQFSBUVSF de-rating Applications Secondary protection for space constrained applications: t 5FMFDPNTZTUFN t /PUFCPPL1$ t 8JSFMFTTCBTFTUBUJPO t -$%1%157 t 8IJUFHPPET t -$%NPOJUPS t (BNFDPOTPMF t -$%1%1QBOFM t 0GmDF"VUPNBUJPO t -$%CBDLMJHIUJOWFSUFS equipment t 1PSUBCMF%7%QMBZFS t #BUUFSZDIBSHJOHDJSDVJU t 1PXFSTVQQMZ protection t /FUXPSLJOH t *OEVTUSJBMFRVJQNFOU t 1$TFSWFS t .FEJDBMFRVJQNFOU t $PPMJOHGBOTZTUFN t"VUPNPUJWF t 4UPSBHFTZTUFN Electrical Characteristics for Series % of Ampere Rating t -FBEGSFFBOE)BMPHFO Free t 4MP#MP® t 4NBMMTJ[F t 8JEFSBOHFPGDVSSFOU ratings available Electrical Specifications by Item Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I2t (A2sec) Agency Approvals PS E 0.375 .375 125 1.5130 0.088 x 0.500 .500 125 0.7633 0.258 x 0.750 .750 125 0.4080 0.847 x 1.00 001. 125 0.2516 1.76 x x 1.50 01.5 125 50 amperes @125 VAC/ VDC 0.1186 4.70 x x 2.00 002. 125 0.0708 6.76 x x 2.50 02.5 125 PSE: 100 amperes @100 VAC 0.0400 13.18 x x 3.00 003. 125 0.0352 19.55 x x 3.50 03.5 125 0.0261 32.70 x x 4.00 004. 125 0.0227 40.80 x x 5.00 005. 125 0.0171 59.59 x x Notes: - l2t calculated at 8ms. Resistance is measured at 10% of rated current, 25ºC © 2012 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/449.html for current information. 449 Series Revised: June 3, 2012 449 Series The lead free NANO2 Slo-Blo® fuse is RoHS compliant, Halogen Free and 100% lead-free. This product is fully compatible with lead-free solder alloys and higher temperature profiles associated with lead-free assembly. The Slo-Blo® design 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. Mount Fuses IntroductionSurface to Circuit Protection NANO2® > Slo-Blo®Transientology > 449 Series .750A 1A 1.5A 2A 2.5A 3A 3.5A 4A 5A Average Time Current Curves .375A .500A Temperature Rerating Curve 1000 TIME IN SECONDS 100 10 1 Note: 1. Derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.1 0.01 0 1 10 100 CURRENT IN AMPERES Soldering Parameters Pre Heat Pb – Free assembly 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 120 secs 3°C/second max. TS(max) to TL - Ramp-up Rate 3°C/second max. - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 90 seconds +0/-5 TL TS(max) tL Ramp-down TS(min) Preheat tS 25 Peak Temperature (TP) 250 Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds Ramp-down Rate 5°C/second max. Time 25°C to peak Temperature (TP) 8 minutes max. Do not exceed 260°C Wave Soldering Parameters ¡$1FBL Temperature, 3 seconds max. 449 Series Critical Zone TL to TP Ramp-up - Temperature Min (Ts(min)) Average ramp up rate (Liquidus Temp (TL) to peak Reflow tP TP Temperature Reflow Condition time to peak temperature (t 25ºC to peak) Time °C © 2012 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/449.html for current information. Surface Mount Fuses NANO2® > Slo-Blo® > 449 Series Product Characteristics Body: Ceramic Terminations:(PMEQMBUFE$BQT Product Marking Brand, Amperage Rating Operating Temperature Moisture Sensitivity Level .*-45%.FUIPE5FTU Condition B, 5 cycles, -65°C to 125°C, 15 minutes @ each extreme .*-45%.FUIPE5FTU* %FFOFSHJ[FE(TQLBNQMJUVEF sawtooth wave 6ms duration, 3 DZDMFT9:;YZ[TIPDLT .*-45%.FUIPE BNQMJUVEF)[JONJOIST FBDI9:;IST Thermal Shock Mechanical Shock -55°C to 125°C -FWFM+45%$ Vibration Solderability .*-45%.FUIPE Insulation Resistance (after Opening) .*-45%.FUIPE5FTU$POEJUJPO A (10,000 ohms minimum) .*-45%.FUIPEDZDMFT Moisture Resistance Salt Spray Resistance to Soldering Heat Dimensions Part Numbering System 6.86 (.270") 6.10 (.240") 3.15 (.124") F 2.95 1.96 (.116") (.077") Recommended pad layout .*-45%.FUIPE5FTU Condition B (48hrs) .*-45%.FUIPE5FTU condition B (10 sec at 260°C) 0449 001. M R SERIES T 1A 1.45 (.057") AMP Code* Refer to Electrical characteristics table 2.69 (.106") QUANTITY Code .QDT 2.69 (.106") PACKAGING Code 35BQFBOE3FFM *Example: 0.375 Amp product is 0449.375MR (1 amp product shown above). Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 12mm Tape and Reel &*"34*&$QBSU 1000 MR © 2012 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/449.html for current information. 449 Series 449 Series Materials