Fuse Mounting Accessories Page 17 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Surface Mount Fuses Ceramic Fuse > 437 Series 437 Series - 1206 Fast-Acting Fuse Description This 100% Lead-free, RoHS compliant and Halogen-free fuse series has been designed specifically to provide over current protection to circuits that see high working ambient temperatures (up to 150C). The general design ensures excellent temperature stability and performance reliability. In addition to this, the high It values typical of the Littelfuse Ceramic Fuse family ensure high inrush current withstand capability. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E10480 0.250A ~ 8A 29862 0.250A ~ 8A Features Electrical Characteristics for Series Operating Temperature from -55C to +150C 100% Lead-free, Halogen- Free and RoHS compliant Suitable for both leaded and lead-free reflow / wave soldering % of Ampere Rating Ampere Rating Opening Time at 25C 100% 250mA - 8A 4 hours, Minimum 250% 750mA - 8A 5 seconds, Maximum 350% 250mA -500mA 5 seconds, Maximum 350% 750mA - 8A 1 second, Maximum Applications Ampere Rating (A) Amp Code Max. Voltage Rating (V) Interrupting Rating 1 Nominal Resistance (Ohms) 2 Nominal Melting I 2 t (A 2 Sec.) 3 Nominal Voltage Drop At Rated Current (V) 4 Nominal Power Dissipation At Rated Current (W) Agency Approvals 250mA .250 125 50 A @ 125 V AC/DC 2.290 0.003 0.78 0.195 x 375mA .375 125 1.330 0.010 0.60 0.225 x 500mA .500 63 50 A @ 63 V AC/DC 0.908 0.018 0.52 0.260 x 750mA .750 63 0.665 0.064 0.45 0.338 x 1A 001. 63 0.420 0.100 0.41 0.410 x 1.25A 1.25 63 0.318 0.1117 0.40 0.500 x 1.5A 01.5 63 0.209 0.1580 0.39 0.585 x 1.75A 1.75 63 0.071 0.2469 0.27 0.473 x 2A 002. 63 0.058 0.197 0.20 0.400 x 2.5A 02.5 32 50 A @ 32 V AC/35 V DC 0.043 0.457 0.15 0.375 x 3A 003. 32 0.033 0.506 0.14 0.420 x 3.5A 03.5 32 0.027 0.777 0.13 0.455 x 4A 004. 32 0.022 1.024 0.13 0.520 x 5A 005. 32 0.0159 2.30 0.13 0.650 x 7A 007. 32 0.0100 5.02 0.13 0.910 x 8A 008. 32 0.008 7.23 0.13 1.040 x Electrical Specifications by Item Notes: 1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting Rating tested at rated voltage with time constant < 0.8 msec. 2. Nominal Resistance measured with < 10% rated current. 3. Contact Littelfuse if application transient surges are less than 1 ms. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized. RoHS Pb LCD Displays Servers Printers Scanners Data Modems Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See "Temperature Re-rating Curve"for additional re-rating information. Devices designed to be mounted with marking code facing up. Application testing is strongly recommended. Additional Information Datasheet Samples Resources

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