Fuse Mounting Accessories Page 47 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Surface Mount Fuses Thin Film > 0603 Size > Fast-Acting > 494 Series 494 Series Fuse, NRA Special Series Integrated Circuit Protector Description Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 0.25A - 5A 29862 0.25A - 5A Electrical Characteristics for Series Features Compatible with lead- free solders and higher temperature profiles High performance materials provide improved performance in elevated ambient temperature applications Marked on top surface with code to allow ampere rating identification without testing Low profile for height sensitive applications Flat top surface for pick- and-place operations Element-covering material is resistant to industry standard cleaning operations Mounting pad and electrical performance are identical to Littelfuse 431 and 434 Series products Alloy-based element construction provides superior inrush withstand characteristics (I 2 t) over ceramic or glass-based 0603 fuse products % of Ampere Rating Opening Time at 25 O C 100% 4 hours, Minimum 200% 5 sec., Maximum 300% 0.2 sec., Maximum Applications The 494 Series Fast-Acting SMF is an ultra small (0603 size) thin-film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is 100% lead-free and meets the requirements of the RoHS directive. New Halide-Free 494 Series fuses are available to order using the "HF" suffix. See Part Numbering section for additional information. Cell phones Battery packs Digital cameras DVD players Hard disk drives Secondary protection for space constrained applications: Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Nom Voltage Drop (mV) Nom Power Dissipation (W) Agency Approvals 0.250 .250 32 50A @32V AC/DC 0.5900 0.0014 158.56 0.0396 x 0.375 .375 32 0.3100 0.0035 128.03 0.0480 x 0.500 .500 32 0.1895 0.0087 138.50 0.0693 x 0.750 .750 32 0.1185 0.0171 123.30 0.0925 x 1.00 001. 32 0.0780 0.0212 67.40 0.0674 x 1.25 32 35A @32V AC/DC 0.0615 0.0518 84.32 0.1054 x 1.40 01.4 32 0.0475 0.05529 74.84 0.1048 x 1.50 01.5 32 0.0405 0.0766 71.60 0.1074 x 1.75 32 0.0340 0.0903 78.75 0.1378 x 2.00 002. 32 0.0270 0.1891 78.22 0.1564 x 2.50 02.5 32 0.0220 0.2066 76.10 0.1903 x 3.00 003. 32 0.0185 0.2403 75.04 0.2251 x 3.15 32 0.0150 0.27405 63.78 0.2009 x 3.50 03.5 32 0.0105 0.4306 65.30 0.2286 x 4.00 004. 32 0.0130 0.8410 63.10 0.2524 x 5.00 005. 32 0.0090 0.9000 61.20 0.3060 x Electrical Specifications by Item 1. Measured at 10% of rated current, 25C. 2. Measured at rated voltage. RoHS Pb Specifications are subject to change without notice. Application testing is strongly recommended. Additional Information Datasheet Samples Resources

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