015702.5DRT

Fuse Datasheet 157T Series Standard Nano2® Fuse and Clip Assembly RoHS PS 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 Additional Information Resources Accessories ■ Surface Mountable, Time-Lag Fuse. ■ Easily replaceable on PC Board (Field Replaceable) ■ Fully compatible with RoHS/ Pb-Free solder alloys and higher temperature profiles associated with leadfree assembly. ■ RoHS Compliant and Halogen-free ■ Available in ratings of 0.375 ~ 5 Amperes. Applications Samples ■ Instrumentations ■ Telecommunications ■ Base Stations Electrical Characteristics for Series Agency Approvals Agency File Number Ampere Range % of Ampere Rating % of Ampere Rating Opening Time at 25ºC E14721 0.375A ~ 5A 100% 0.375A ~ 5A NBK030205-E10480B 1A - 5A 200% 0.375A ~ 5A Note: PSE/METI Certification is only applicable to the fuse. Clips do not require certification for the Japanese Market 300% 0.375A ~ 5A 800% 0.375A ~ 5A 4 hours, Minimum 1 sec. Minimum, 60 secs. Maximum 0.20 secs. Minimum, 3.00 secs. Maximum 0.02 secs. Minimum, 0.10 secs. Maximum Agency PS E Electrical Specifications by Item Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating (A) Fuse Furnished Nominal Cold Resistance (Ohms) Nominal Melting I2t (A2sec) Agency Approvals PS E 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 2.00 2.0 125 45401.5 0.0934 3.65 X X 454002.0 0.0629 8.20 X 2.50 2.5 X 125 45402.5 0.0452 15.0 X 3.00 X 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 50A @ 125VAC/VDC 1. Cold resistance measured at less than 10% of rated current at 23ºC. 2. I2t 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 1 © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/24/21 Fuse Datasheet 157T Series Standard Nano2® Fuse and Clip Assembly Temperature Re-rating Curve 2.0A 2.5A 3.0A 3.5A 4A 5A .75A 1.0A 1.5A 100 .50A .375A Average Time Current Curves TIME IN SECONDS 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 Pre Heat Pb – Free assembly - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 secs Average ramp up rate (Liquidus Temp (TL) to peak 5°C/second max TS(max) to TL - Ramp-up Rate 5°C/second max Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds Peak Temperature (TP) 5°C/second max Time 25°C to peak Temperature (TP) 8 minutes Max. Do not exceed 260°C 2 tL Ramp-down TS(min) 25 Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds Critical Zone TL to TP Ramp-up TL TS(max) 250+0/-5 °C Ramp-down Rate tP TP Temperature Reflow Condition Preheat tS time to peak temperature (t 25ºC to peak) Time © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/24/21 Fuse Datasheet 157T Series Standard Nano2® Fuse and Clip Assembly Product Characteristics Body: Ceramic Cap: For 0.375A ~ 5A – Silver plated Brass Clip Plating: Matte Tin Materials Product Marking Operating Temperature -55ºC to 125ºC with proper derating Body: Brand Logo, Current Rating, “T” for Time-Lag Clip Retention Force applied at fuse center, perpendicular to the long axis (@0.75 lbs. MIN) Solderability MIL-STD-202, Method 208 / IPC/ EIA / JEDEC J-STD-002, Test Condition A Humidity Test MIL –STD-202, Method 103 @ 85ºC / 85%RH, 1000 hours Resistance to Solvents MIL-STD-202, Method 215 (3 solvent types) Thermal Shock MIL-STD-202, Method 107, Test Condition B (5 cycles -65ºC to +125ºC) Vibration MIL-STD-202, Method 201 (10-55 Hz) Moisture Resistance MIL-STD-202, Method 106, 10 cycles Salt Spray/ Atmosphere MIL-STD-202, Method 101, Test Condition B (48 hrs.), 5% NaCl in De-ionized Water Shock MIL-STD-202, Method 213, Test Condition I (100 G’s peak for 6 milliseconds) Part Numbering System Dimensions 6.50 ± 0.20 [0.256] 0157 005. D R T 6.10 [0.240] 2.69 [0.106] LF Series T 3.7 ± 0.13 [0.146] Time-Lag Fuse 2.69 [0.106] 1A Packing Option Amp code 1.45 [0.057] R = Tape and Reel Quantity Code 3.70 [0.146] D = 1500 pcs 3.40 [0.134] 3.90 ± 0.13 [0.154] Packaging 2.50 ± 0.2 [0.098] "A" "B" 0.10 Packaging Option Packaging Specification Quantity Quantity & Packaging Code Tape and Reel Surface Mount 1500 DRT 7.26 [0.29] 2.46 [0.10] 3.00 [0.12] 2.40 [0.09] PCB Recommendation for Thermal Management 1. Minimum Copper Layer Thickness = 100um 2. Minimum Copper Trace Width = 10mm Note: Alternate methods of thermal management may be used. In such cases, under normal operations, the maximum temperature of the fuse body should not exceed 80ºC in a 25ºC ambient environment. 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. 09/24/21