Fuse Datasheet 157 Series 2 Standard Nano Fuse and Clip Assembly PS RoHS E Description The 157 Series Standard Nano Fuse/Clip assembly is a small, square, very fast-acting surface mount fuse that is assembled in surface mountable fuse clips. The fuse clip and pre-installed fuse combination can be automatically placed in PC Board in one efficient manufacturing operation. It permits quick and easy replacement of fuses without performing desoldering process, even in the field and without exposing the PC Board to detrimental effects of rework solder heat. Features & Benefits Surf ace Mountable Easily replaceable on PC Board (Field Replaceable) Very Fast-Acting Fuse RoHS compliant and Halogen Fully compatible with RoHS/ Free Pb-Free solder alloys and higher temperature profiles Available in ratings of 0.062 ~ associated with leadfree 10 Amperes. assembly. Additional Information Applications Instrument ation Telecommunications B ase St ations Electrical Characteristics for Series Resources Accessories Samples % of Ampere Rating Opening Time at 25C 100% 4 hours Minimum 200% 5 secs. Maximum Electrical Specifications by Item Agency Approvals Nominal Ampere Amp Max Voltage Interrupting Fuse Nominal Cold Melting PS Rating (A) Code Rating (V) Rating (A) Furnished Resistance (Ohms) E 2 2 I t (A sec) 0.062 0.062 125 451.062 5.5372 0.00019 X - 0.08 0.08 125 451.08 4.0500 0.00033 X - 0.1 0.1 125 451.1 3.1000 0.00138 X - 0.125 0.125 125 451.125 1.7059 0.00286 X - 0.16 0.16 125 453.16 1.2157 0.0048 X - 0.2 0.2 125 453.2 1.3971 0.00652 X - 0.25 0.25 125 453.25 1.0496 0.01126 X - 0.315 0.315 125 453.315 0.3881 0.0311 X - 0.375 0.375 125 453.375 0.4518 0.0442 X - 0.4 0.4 125 453.4 0.4212 0.0551 X - 0.5 0.5 125 453.5 0.3031 0.0824 X - 0.63 0.63 125 453.63 0.2012 0.1381 X - 0.75 0.75 125 453.75 0.1437 0.2143 X - 50A 125 VAC/VDC 0.8 0.8 125 453.8 0.1348 0.2654 X - 1.0 1.0 125 453001.0 0.0776 0.6029 X X 300A 32 VDC 1.25 1.25 125 4531.25 0.078 0.664 X X 1.5 1.5 125 45301.5 0.0634 0.853 X X 1.6 1.6 125 45301.6 0.0580 1.06 X X 2.0 2.0 125 453002.0 0.0373 0.53 X X 2.5 2.5 125 45302.5 0.0288 1.029 X X 3.0 3.0 125 453003.0 0.0229 1.65 X X 3.15 3.15 125 4533.15 0.0215 1.92 X X 3.5 3.5 125 45303.5 0.0203 2.469 X X 4.0 4.0 125 453004.0 0.0163 3.152 X X 5.0 5.0 125 453005.0 0.0127 5.566 X X 6.3 6.3 125 45306.3 0.0098 9.17 X X 7.0 7.0 125 453007.0 0.0092 10.32 X X 8.0 8.0 125 453008.0 0.0079 20.23 X X 35A 125 VAC / 50A 125 VDC 10.0 10.0 125 453010.0 0.0058 26.46 X X 300A 32VDC 1. Cold resistance measured at less than 10% of rated current at 23C. 4. Have special electrical characteristic needs Contact Littelfuse to learn more about application specific 2 2. I t values stated for 8ms opening time. options. 3. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved 2021 Littelfuse, Inc. 1 Specifications are subject to change without notice. Revised: BA. 09/24/21Fuse Datasheet 157 Series 2 Standard Nano Fuse and Clip Assembly Agency Approvals Average Time Current Curves Agency Agency File Number Ampere Range 100 E14721 0.062A - 10A NBK030205-E10480A 1A - 1.6A PS NBK030205-E10480B 2A - 5A E NBK101105-E184655 6.3A - 10A Note: PSE/METI Certification is only applicable to the fuse. Clips do not require certification for the Japanese 10 Market. Temperature Re-rating Curve 1 0.1 0.01 Note: 0.001 0.01 0.1 1 10 100 1000 10000 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. CURRENT IN AMPS Soldering Parameters Reflow Condition Pb Free assembly t P - Temperature Min (T ) 150C s(min) T P Critical Zone Ramp-up Pre Heat - Temperature Max (T ) 200C T to T L P s(max) - Time (Min to Max) (t ) 60 180 secs T L s t L T Average ramp up rate (Liquidus Temp (T ) to S(max) L 5C/second max. peak Ramp-down T to T - Ramp-up Rate 5C/second max. Preheat S(max) L T S(min) - Temperature (T ) (Liquidus) 217C t L S Reflow - Temperature (t ) 60 150 seconds L 25 +0/5 Peak Temperature (T ) 260 C P time to peak temperature Time (t 25C to peak) Time within 5C of actual peak Temperature (t ) 20 40 seconds p Ramp-down Rate 5C/second max. Time 25C to peak Temperature (T ) 8 minutes max. P Do not exceed 260C 2021 Littelfuse, Inc. 2 Specifications are subject to change without notice. Revised: BA. 09/24/21 TIME IN SECONDS 62mA 80mA 100mA 125mA 160mA 200mA 250mA 315mA 375mA 400mA 500mA 630mA 750mA 800mA 1A 1.25A 1.5A 1.6A 2A 2.5A 3A 3.15A 3.5A 4A 5A 6.3A 7A 8A 10A Temperature