Axial Lead & Cartridge Fuses PICO ll > Very Fast-Acting Fuse > 251/253 Series PS E QPL 251/253 Series, PICO II Very Fast-Acting Fuse Description The PICO II Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. Features Very fast-acting Halogen-free available Small size Wide operating temperature range Wide current rating range (0.062A- 15A) Low temperature re-rating Applications Agency Approvals Secondary protection for space constrained applications Agency File Number Agency Ampere Range 253 Series 251 Series Flatpanel display TV Power supply E10480 0.062A - 15A LCD monitor Audio/Video system 29862 0.062A - 15A LCD backlight inverter Lighting system PS E PSE NBK200416-JP1021 1A - 5A Office machines Medical equipment J50158379 0.500A - 10A FM10 N/A 0.062A - 15A Electrical Characteristics for Series 0.500A, 1A, 2A, 2.5A, 3A, 2020970207000061 4A, 5A % of Ampere Ampere Rating Opening Time Rating Note: See Electrical Specifications by Item table for specific approved ratings. 100% 0.062A - 15A 4 Hours, Min. 0.062A - 7A 1 Second, Max. 200% 10A 3 Seconds, Max. 12 - 15A 10 Seconds, Max. 0.500A, 1A, 2A, 275% 2.5A, 3A, 4A, 5A, 300 msecs., Max. Additional Information 7A, 10A 0.5A, 1A, 2A, 2.5A, 400% 30 msecs., Max. 3A, 4A, 5A, 7A, 10A 0.500A, 1A, 2A, 1000% 2.5A, 3A, 4A, 5A, 4 msecs., Max. 7A, 10A Datasheet Resources Samples 251 Series 251 Series 251 Series Resources Samples Datasheet 253 Series 253 Series 253 Series 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD.10/14/20Axial Lead & Cartridge Fuses PICO ll > Very Fast-Acting Fuse > 251/253 Series Electrical Specifications by Item Agency Approvals Max Nominal Nom Ampere Ordering Ordering Nominal Amp Voltage Interrupting Cold Voltage QPL Rating Number Number Melting PS Code Rating Rating Resistance Drop 253 2 2 E (A) (Std.) (Mil.) I t (A sec) Series (V) (Ohms) (V) Only .062 .062 251.062 253.062 125 7.000 0.000113 1.4 x x - - x - .125 .125 251.125 253.125 125 1.700 0.00174 0.285 x x - - x - .200 .200 251.200 253.200 125 0.895 0.0048 0.345 x x - - - - .250 .250 251.250 253.250 125 0.665 0.0116 0.24 x x - - x - .375 .375 251.375 253.375 125 0.395 0.0296 0.215 x x - - x - .500 .500 251.500 253.500 125 0.302 0.0598 0.2165 x x - x x x .630 .630 251.630 125 0.205 0.08 0.188 x x - - - - .750 .750 251.750 253.750 125 0.175 0.153 0.176 x x - x x - 1.00 001. 251001. 253001. 125 0.128 0.256 0.194 x x x x x x 300 A 1.25 1.25 2511.25 125 0.100 0.390 0.2 x x x - - - 125VDC 1.50 01.5 25101.5 25301.5 125 0.0823 0.587 0.21 x x x x x - 50A 2.00 002. 251002. 253002. 125 0.0473 0.405 0.141 x x x x x x 125VAC 2.50 02.5 25102.5 125 0.0360 0.721 0.132 x x x x - x 3.00 003. 251003. 253003. 125 0.0295 1.19 0.131 x x x x x x 3.50 03.5 25103.5 125 0.0240 1.58 0.1205 x x x x - - 4.00 004. 251004. 253004. 125 0.0204 2.45 0.114 x x x x x x 5.00 005. 251005. 253005. 125 0.0158 4.14 0.11 x x x x x x 7.00 007. 251007. 253007. 125 0.0107 10.4 0.102 x x - x x - 10.0 010. 251010. 253010. 125 0.0072 25.5 0.1 x x - x x - 12.0 012. 251012. 32 0.0059 45.2 0.0878 x x - - - - 300A 32VDC & 50A 32VAC 15.0 015. 251015. 253015. 32 0.00446 68.8 0.071 x x - - x - Note: Higher ampere ratings are available. Please contact Littelfuse Technical Support or your Littelfuse products representative for assistance. Temperature Re-rating Curve Average Time Current Curves 100 10 1 0.1 Note: 1. Re-rating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.01 0.001 0.05 0.1 110100 1000 CURRENT IN AMPERES 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD.10/14/20 TIME IN SECONDS .062A .125A .250A .375A .500A .630A .750A 1A 1.25A 1.5A 2A 2.5A 3A 3.5A 4A 5A 7A 10A 12A 15A