POLYFUSE® Resettable PTCs Axial Leaded Strap LR Series Description The new LR series device provides reliable, noncycling protection against overcharging and short circuits events for rechargeable battery cells where resettable protection is desired. Features • RoHS compliant and lead-free • Weldable nickel terminals • Slim, low profile design Agency Approvals AGENCY AGENCY FILE NUMBER • Compact design saves board space • Low resistance Applications E183209 •R echargeable battery cell protection R50082521 Electrical Characteristics Part Number I hold (A) I trip (A) V max (Vdc) I max (A) Pd max. (W) 15LR190 1.9 3.9 15 100 15LR190S 1.9 3.9 15 15LR260 2.6 5.8 15LR260S 2.6 5.8 15LR380 3.8 20LR450 20LR550 Maximum Time To Trip Agency Approvals Resistance Current (A) Time (Sec.) R min (Ω) R typ (Ω) R 1max (Ω) 1.2 9.50 5.00 0.039 0.072 0.102 X X 100 1.2 9.50 5.00 0.039 0.072 0.102 X X 15 100 2.5 13.00 5.00 0.020 0.042 0.063 X X 15 100 2.5 13.00 5.00 0.020 0.042 0.063 X X 8.3 15 100 2.5 19.00 5.00 0.013 0.026 0.037 X X 4.5 8.9 20 100 2.5 22.50 5.00 0.011 0.020 0.028 X X 5.5 10.5 20 100 2.8 27.50 5.00 0.009 0.016 0.022 X X 20LR600 6.0 11.7 20 100 2.8 30.00 5.00 0.007 0.014 0.019 X X 20LR730 7.3 14.1 20 100 3.3 30.00 5.00 0.006 0.012 0.015 X X I hold = Hold current: maximum current device will pass without tripping in 20°C still air. R typ = Typical resistance of device in initial (un-soldered) state. I trip = Trip current: minimum current at which the device will trip in 20°C still air. R 1max = Maximum resistance of device at 20°C measured one hour after tripping or reflow soldering of 260°C for 20 sec. V max = Maximum voltage device can withstand without damage at rated current (I max) Caution: Operation beyond the specified rating may result in damage and possible arcing and flame. I max = Maximum fault current device can withstand without damage at rated voltage (Vmax) P d = Power dissipated from device when in the tripped state at 20°C still air. R min = Minimum resistance of device in initial (un-soldered) state. LR Series Specifications are subject to change without notice. Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse POLYFUSE® Resettable PTCs Axial Leaded Strap Temperature Rerating Ambient Operation Temperature -40°C -20°C 0°C 23°C Part Number 40°C 50°C 60°C 70°C 85°C Hold Current (A) 15LR190 2.80 2.50 2.30 1.90 1.60 1.50 1.40 1.20 1.00 15LR190S 2.80 2.50 2.30 1.90 1.60 1.50 1.40 1.20 1.00 15LR260 3.80 3.40 3.10 2.60 2.20 2.00 1.90 1.70 1.40 15LR260S 3.80 3.40 3.10 2.60 2.20 2.00 1.90 1.70 1.40 15LR380 5.50 4.90 4.40 3.80 3.30 3.00 2.80 2.50 2.10 20LR450 6.50 5.80 5.30 4.50 3.90 3.60 3.30 2.90 2.50 20LR550 8.00 7.10 6.20 5.50 4.70 4.30 4.00 3.60 3.00 20LR600 8.70 7.80 7.10 6.00 5.20 4.70 4.40 3.90 3.30 20LR730 10.60 9.50 8.60 7.30 6.30 5.70 5.40 4.70 4.00 Average Time Current Curves Temperature Rerating Curve 170% Percentage of Rated Current 150% B 130% A 110% 90% 70% A 50% B 30% 10% -40 -30 -20 A: 15LR380 -10 0 10 20 30 40 Temperature (°C) A: 15LR190,15LR190S, 15LR260, 15LR260S, 20LR450 C: 20LR730 50 60 70 80 B: 15LR380, 20LR550, 20LR600, 20LR730 B: 20LR450 The average time current curves and temperature rerating curve performance is affected by a number or variables, and these curves provided as guidance only. Customer must verify the performance in their application. LR Series Specifications are subject to change without notice. Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse POLYFUSE® Resettable PTCs Axial Leaded Strap Physical Specifications Terminal Material Environmental Specifications 0.13mm nominal thickness, quarter-hard nickel Insulating Material Polyester tape Operating/Storage Temperature -40°C to +85°C Maximum Device Surface Temperature in Tripped State 125°C Passive Aging +70°C, 1000 hours ±10% typical resistance change Humidity Aging +85°C, 85%R.H. 70days ±5% typical resistance change Vibration MIL-STD-883C, Method 2007.1, Condition A No change Dimensions Figure 1 Figure 2 SLIT 0.5 x 4.0 NOMINAL (.02”x .15”) A A Marking B E D1 Marking B D2 E D1 D2 C Part Number A Inches C B mm C Inches mm Inches D1 mm D2 E Inches mm Inches mm Inches Figure mm Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min. Min. Min. Min Max. Min. Max. 15LR190 0.78 0.87 19.90 22.10 0.19 0.22 4.90 5.50 0.02 0.04 0.60 1.00 0.22 5.50 0.22 5.50 0.01 0.22 3.90 4.10 1 15LR190S 0.78 0.87 19.90 22.10 0.19 0.22 4.90 5.50 0.02 0.04 0.60 1.00 0.22 Series 5.50 Product 0.22 5.50 0.01 0.22 3.90 4.10 2 15LR260 0.82 0.91 20.90 23.10 0.19 0.22 4.90 5.50 0.02 0.16 0.16 0.82 0.91 20.90 23.10 0.19 0.22 4.90 5.50 0.04 LR 0.60 190S 0.02 XX9R 0.04 0.60 1.00 15LR260S 1.00 0.16 15LR380S 0.94 1.02 24.00 26.00 0.27 0.30 6.90 7.50 0.02 0.04 0.60 1.00 0.16 20LR450S 0.94 1.02 24.00 26.00 0.39 Trademark 0.41 9.90 10.50 0.02 0.04 20LR550S 1.38 1.46 35.00 37.00 0.27 0.30 0.02 20LR600S 0.94 1.02 24.00 26.00 0.55 0.57 13.90 14.50 0.02 20LR730S 1.07 1.15 27.10 29.10 0.55 0.57 13.90 14.50 0.02 LR Series Specifications are subject to change without notice. Littelfuse 6.90 7.50 Top Side 4.10 0.01 0.16 3.90 4.10 1 4.10 0.16 4.10 0.01 0.16 3.90 4.10 2 4.10 0.16 4.10 0.01 0.16 4.90 5.10 1 0.60 1.00(Contact 0.21Littelfuse 5.30 0.21 5.30 0.01 0.21 5.90 6.10 1 0.04 0.60 1.00 0.21 5.30 0.21 5.30 0.01 0.21 4.90 5.10 1 0.04 0.60 1.00 0.16 4.10 0.16 4.10 0.01 0.16 5.90 6.10 1 0.04 0.60 1.00 0.16 4.10 0.16 4.10 0.01 0.16 5.90 6.10 1 Lot Number for additional information) Electronics Designers Guide 4.10 Current Rating www.littelfuse.com ©2006 Littelfuse D1 D2 D1 C D2 C POLYFUSE® Resettable PTCs Axial Leaded Strap Part Marking System Part Numbering System 15 LR 190 S U Top Side Product Series LR 190S XX9R Littelfuse Trademark QUANTITY CODE U: 500 (bulk) Current Rating LEAD OPTIONS: Blank = standard S = slit lead Lot Number (Contact Littelfuse for additional information) HOLD CURRENT (VALUE DIVIDED BY 100 = HOLD CURRENT IN AMPS) SERIES Voltage Rating (VDC) Packaging I hold (A) All Ratings Packaging Option Quantity Quantity & Packaging Codes Bulk 500 U LR Series Specifications are subject to change without notice. Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse