0157004.DRT Littelfuse

Fuse Datasheet 157T Series 2 Standard Nano Fuse and Clip Assembly PS RoHS E Description The 157T Series Fuse/Clip assembly is a small, square, Time-Lag, surface mount fuse that is assembled in surface mountable fuse clips. The unique time delay feature of this fuse design helps solve the problem of nuisance opening by accommodating inrush currents that normally cause a fast-acting fuse to open. 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 Time-Lag Fuse. Board (Field Replaceable) Additional Information Fully compatible with RoHS/ RoHS Compliant and Pb-Free solder alloys and Halogen-free higher temperature profiles Available in ratings of 0.375 ~ associated with leadfree 5 Amperes. assembly. Applications Resources Accessories Samples Instrument ations Telecommunications B ase St ations Agency Approvals Electrical Characteristics for Series % of Ampere Rating % of Ampere Rating Opening Time at 25C Agency Agency File Number Ampere Range 100% 0.375A ~ 5A 4 hours, Minimum E14721 0.375A ~ 5A 1 sec. Minimum, PS E NBK030205-E10480B 1A - 5A 200% 0.375A ~ 5A 60 secs. Maximum Note: PSE/METI Certification is only applicable to the fuse. Clips do not require certification for the 0.20 secs. Minimum, 300% 0.375A ~ 5A Japanese Market 3.00 secs. Maximum 0.02 secs. Minimum, 800% 0.375A ~ 5A 0.10 secs. Maximum Electrical Specifications by Item Interrupting Nominal Agency Approvals Ampere Max Voltage Fuse Nominal Cold Amp Code Rating Melting Rating (A) Rating (V) Furnished Resistance (Ohms) PS 2 2 E (A) I t (A sec) 0.375 0.375 125 454.375 1.2214 0.101 X - 0.50 0.500 125 454.5 0.7047 0.240 X - 0.75 0.750 125 454.75 0.3602 0.904 X - 1.00 1.0 125 454001.0 0.2245 1.98 X X 1.50 1.5 125 45401.5 0.0934 3.65 X X 2.00 2.0 125 50A 125VAC/VDC 454002.0 0.0629 8.20 X X 2.50 2.5 125 45402.5 0.0452 15.0 X X 3.00 3.0 125 454003.0 0.0342 20.16 X X 3.50 3.5 125 45403.5 0.0226 26.53 X X 4.00 4.0 125 454004.0 0.0188 34.40 X X 5.00 5.0 125 454005.0 0.0138 53.72 X X 1. Cold resistance measured at less than 10% of rated current at 23C. 2 2. I t values stated for 8ms opening time. 3. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved 4. Have special electrical characteristic needs Contact Littelfuse to learn more about application specific options 2021 Littelfuse, Inc. 1 Specifications are subject to change without notice. Revised: GD. 09/24/21Fuse Datasheet 157T Series 2 Standard Nano Fuse and Clip Assembly Temperature Re-rating Curve Average Time Current Curves 100 10 1 0.1 Note: 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.01 0.001 0.1 1 10 100 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 s L 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 L t S Reflow - Temperature (t ) 60 150 seconds L 25 +0/-5 Peak Temperature (T ) 250 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: GD. 09/24/21 TIME IN SECONDS .375A .50A .75A 1.0A 1.5A 2.0A 2.5A 3.0A 3.5A 4A 5A Temperature