025101.6NAT1L

Fuse Datasheet 251/253 Series PICO® II Very Fast-Acting Fuse QPL PS E 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 and Benefits ■ Very fast-acting ■ Halogen-free available ■ Small size ■ Wide operating temperature range ■ Wide current rating range (0.062A- 15A) ■ Low temperature re-rating Applications Secondary protection for space constrained applications ■ Power supply ■ Flat–panel display TV Additional Information Resources 251 Series Resources 253 Series Accessories 251 Series Accessories 253 Series Samples 251 Series PS E QPL Agency File/Certificate Number ■ Audio/Video system ■ LCD backlight inverter ■ Lighting system ■ Office machines ■ Medical equipment Electrical Characteristics for Series % of Ampere Rating Ampere Rating Opening Time 100% 0.062A - 15A 4 Hours, Min. 200% Samples 253 Series 275% Agency Approvals Agency ■ LCD monitor 400% Ampere Range 253 Series 251 Series N/A E10480 0.062A - 15A N/A 29862 0.062A - 15A N/A PSE_NBK200416-JP1021 1A - 5A N/A J50158379 0.500A - 10A FM10 N/A N/A 2020970207000061 0.062A - 15A 0.500A, 1A, 2A, 2.5A, 3A, 4A, 5A 1000% 0.062A - 7A 1 Second, Max. 10A 3 Seconds, Max. 12 - 15A 10 Seconds, Max. 0.500A, 1A, 2A, 2.5A, 3A, 4A, 5A, 7A, 10A 0.5A, 1A, 2A, 2.5A, 3A, 4A, 5A, 7A, 10A 0.500A, 1A, 2A, 2.5A, 3A, 4A, 5A 300 msecs., Max. 30 msecs., Max. 4 msecs., Max. Note: See Electrical Specifications by Item table for specific approved ratings. 1 © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD.10/11/21 Fuse Datasheet 251/253 Series PICO® II Very Fast-Acting Fuse Electrical Specifications by Item Ampere Rating (A) Amp Code Ordering Number (Std.) Ordering Number (Mil.) .062 .125 .200 .250 .375 .500 .630 .750 1.00 1.25 1.50 2.00 2.50 3.00 3.50 4.00 5.00 7.00 10.0 12.0 .062 .125 .200 .250 .375 .500 .630 .750 001. 1.25 01.5 002. 02.5 003. 03.5 004. 005. 007. 010. 012. 251.062 251.125 251.200 251.250 251.375 251.500 251.630 251.750 251001. 2511.25 25101.5 251002. 25102.5 251003. 25103.5 251004. 251005. 251007. 251010. 251012. 253.062 253.125 253.200 253.250 253.375 253.500 15.0 015. 251015. 253015. 253.750 253001. 25301.5 253002. 253003. 253004. 253005. 253007. 253010. Max Voltage Rating (V) 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 32 32 Interrupting Rating 300 A @ 125VDC 50A@ 125VAC Nominal Cold Resistance (Ohms) 7.000 1.700 0.895 0.665 0.395 0.302 0.205 0.175 0.128 0.100 0.0823 0.0473 0.0360 0.0295 0.0240 0.0204 0.0158 0.0107 0.0072 0.0059 300A@32VDC & 50A@32VAC 0.00446 Nominal Melting 2 I t (A2 sec) 0.000113 1.4 0.00174 0.285 0.0048 0.345 0.0116 0.24 0.0296 0.215 0.0598 0.2165 0.08 0.188 0.153 0.176 0.256 0.194 0.390 0.2 0.587 0.21 0.405 0.141 0.721 0.132 1.19 0.131 1.58 0.1205 2.45 0.114 4.14 0.11 10.4 0.102 25.5 0.1 45.2 0.0878 68.8 Agency Approvals Nom Voltage Drop (V) 0.071 QPL PS E 253 Series Only x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x - x x x x x x x x x x x x - x x x x x x x x x x x x x x - x x x x x x x - x x - - x - Note: Higher ampere ratings are available. Please contact Littelfuse Technical Support or your Littelfuse products representative for assistance. .250A .375A .500A .630A .750A 1A 1.25A 1.5A 2A 2.5A 3A 3.5A 4A 5A 7A 10A 12A 15A 100 .125A Average Time Current Curves .062A Temperature Re-rating Curve TIME IN SECONDS 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 1 10 100 1000 CURRENT IN AMPERES 2 © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD.10/11/21 Fuse Datasheet 251/253 Series PICO® II Very Fast-Acting Fuse Product Characteristics Encapsulated, Epoxy-coated Body 251 Series: Pure tin-coated copper wire leads 253 Series: Solder-coated copper wire leads MIL-STD-202, Method 208 MIL-STD-202, Method 211, Test Condition A (will withstand a 7lbs. axial pull test) For fuses to MIL-PRF-23419, FM10 change the series number from 251 to 253 Materials Solderability Lead Pull Force Fuses To MIL SPEC Operating Temperature MIL-STD-202, Method 201 (10–55 Hz); Method 204, Test Condition C (55–2000 Hz at 10 G’s Peak) MIL-STD-202, Method 213, Test Shock Condition I (100 G’s peak for 6 msecs.) MIL-STD-202, Method 302, Insulation Resistance Test Condition A (10,000 ohms (After Opening): minimum at 100 volts) Moisture Resistance MIL-STD-202, Method 106 Withstands 60 seconds above 200OC Resistance to Soldering Heat and up to 260ºC, maximum Flammability Rating UL 94V–0 Vibration –55ºC to +125ºC (Consider re-rating) Soldering Parameters Recommended Process Parameters: Packaging Wave Parameter Lead-Free Recommendation for 251 Series only (Depends on Flux Activation Temperature) (Typical Industry Recommendation) Packaging Option Packaging Specification *T1: 52.4mm (2.062") Tape and Reel EIA 296 **T3: 73mm (2.874') Tape and Reel EIA 296 Preheat: 100°C Temperature Minimum: 150°C Temperature Maximum: Quantity & Packaging Code Please refer to available quantities above in "Part Numbering System” Preheat Time: 60-180 seconds Solder Pot Temperature: 260°C Maximum The default lead length for both ammo pack and loose pack is T1 for 251 and is T3 for 253. 2-5 seconds Notes: * T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468"). T1 length is for 251 series only. ** T3 dimension is defined as the length of the component between the two tapes. The full component length is 83.3.7mm (3.28”). T3 length is for 253 series only. Solder Dwell Time: Recommended Hand Soldering Parameters: Solder Iron Temperature: 350°C +/- 5°C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process Part Numbering System Dimensions 251 Series Markings 27.78 (1.094") (T1 lead length) 62.7 (2.468") 52.4 (2.062")* 7.11 (.280") 1A 6.35 (.25") tape LF 5.0 (.197") 1A 0251 xxxx N R T1 L Series 27.78 (1.094") 251 = Standard type 253 = Military type Current Rating 2.80 (.11") MAX Refer to Amp Code column of Electrical Specifications Table 6.35 (.25") tape Quantity LF N = 5000 P = 2000 M = 1000 H = 100 Wire Diameter: 0.64 (.025") for 0.062-10 amp, 0.81 (.032") for 12-15 amp Type of Packaging 253 Series Markings 38.1 (1.5") 73.0 (2.874")** 7.11 (.280") LF 6.35 (.25") tape LF 38.1 (1.5") 2.61 (.103") MAX 27.78 (1.094") (T1 lead length) 62.7 (2.468") 52.4 (2.062")* 7.11 (.280") 27.78 (1.094") Lead Length F The default lead length for Ammo pack and L Loose pack is now T1 for 251 series, and 5.0 (.197") 6.35 (.25") remains T3 for 253 series, therefore: tape 251 series only* T1 = 52.4mm (2.062”), Blank = 52.4mm (2.062”) for 251 series* 1 A or 73mm (2.874”) for 253 series** 1A 5.0 (.197") 251 Series (Halogen-free Version) Markings R = Reel A = Ammo Pack X = Loose Pack (T3 lead length) 83.31 (3.28") 6.35 (.25") tape 1A Option Codes Wire Diameter: 0.64 (.025") for 0.062-10 amp, 0.81 (.032") for 15 amp 1A 2.80 (.11") MAX LF Wire Diameter: 0.64 (.025") for 0.62-10.0 amp, 0.81 (.032") for 12-15 amp L = RoHS + HF (Only applies to 251 Series) Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. 3 © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD.10/11/21 6.35 (.25") tape