Fuse Mounting Accessories Page 97 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Surface Mount Fuses NANO 2 > 157T Fuse and Holder Combination 157T Series - Standard Nano 2 Fuse and Clip Assembly 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. Agency Approvals AGENCY AGENCY FILE NUMBER AMPERE RANGE E14721 0.375A ~ 5A PS E NBK030205-E10480B 1A - 5A Features Electrical Characteristics for Series Surface Mountable, Time-Lag Fuse. Fully compatible with RoHS/Pb-Free solder alloys and higher temperature profiles associated with leadfree assembly. Easily replaceable on PC Board (Field Replaceable) RoHS Compliant and Halogen-free Available in ratings of 0.375 ~ 5 Amperes. % of Ampere Rating % of Ampere Rating Opening Time at 25C 100% 0.375A ~ 5A 4 hours, Minimum 200% 0.375A ~ 5A 1 sec. Minimum, 60 secs. Maximum 300% 0.375A ~ 5A 0.20 secs. Minimum, 3.00 secs. Maximum 800% 0.375A ~ 5A 0.02 secs. Minimum, 0.10 secs. Maximum Applications Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating (A) Fuse Furnished Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals PS E 0.375 .375 125 50A @ 125VAC/VDC 0454.375 1.2214 0.101 X 0.500 .500 125 0454.500 0.7047 0.240 X 0.750 .750 125 0454.750 0.3602 0.904 X 1.00 001 125 0454001. 0.2245 1.98 X 1.50 01.5 125 045401.5 0.0934 3.65 X 2.00 002 125 0454002. 0.0629 8.20 X 2.50 02.5 125 045402.5 0.0452 15.0 X 3.00 003 125 0454003. 0.0342 20.16 X 3.50 03.5 125 045403.5 0.0226 26.53 X 4.00 004 125 0454004. 0.0188 34.40 X 5.00 005 125 0454005. 0.0138 53.72 X Electrical Specifications by Item 1. Cold resistance measured at less than 10% of rated current at 23C. 2. I 2 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 RoHS Instrumentations Base Stations Telecommunications PS E Application testing is strongly recommended. Additional Information Datasheet Samples Resources

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