24LT300

POLYFUSE® Resettable PTCs Axial Leaded Strap LT Series Description The new LT 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 • Compact design saves board space Applications • Rechargeable battery cell protection - Mobile phones - Laptop computers • Low resistance • Provides overcurrent protection at 100°C trip temperature Agency Approvals AGENCY AGENCY FILE NUMBER E183209 R50082521 Electrical Characteristics I hold (A) 0.7 0.7 1.0 1.0 1.0 1.8 1.8 1.8 1.9 1.9 2.6 3.0 3.1 3.4 I trip (A) 1.5 1.5 2.5 2.5 2.5 3.8 3.8 3.8 4.2 4.2 5.2 6.3 6.0 6.8 V max (Vdc) 15 15 24 24 24 24 24 24 24 24 24 24 24 24 I max (A) 100 100 100 100 100 100 100 100 100 100 100 100 100 100 Pd max. (W) 1.0 1.0 1.5 1.5 1.5 2.0 2.0 2.0 1.9 1.9 2.3 2.0 2.5 2.7 Maximum Time To Trip Current (A) 3.50 3.50 5.00 5.00 5.00 9.00 9.00 9.00 10.00 10.00 13.0 15.0 16.0 17.0 Time (Sec.) 5.00 5.00 7.00 7.00 7.00 2.90 2.90 2.90 3.00 3.00 5.0 4.0 5.0 5.0 R min (Ω) 0.100 0.100 0.070 0.070 0.070 0.040 0.040 0.040 0.030 0.030 0.025 0.015 0.018 0.016 Resistance R typ (Ω) 0.200 0.200 0.130 0.130 0.130 0.068 0.068 0.068 0.057 0.057 0.042 0.031 0.030 0.027 R 1max (Ω) 0.340 0.340 0.260 0.260 0.260 0.120 0.120 0.120 0.100 0.100 0.076 0.055 0.055 0.050 X X X X X X X X X X X X X X X X X X X X X X X X X X X X Agency Approvals Part Number 15LT070 15LT070S 24LT100 24LT100S 24LT100SS 24LT180 24LT180S 24LT180SS 24LT190 24LT190S 24LT260 24LT300 24LT310 24LT340 I hold = Hold current: maximum current device will pass without tripping in 20°C still air. I trip = Trip current: minimum current at which the device will trip in 20°C still air. V max = Maximum voltage device can withstand without damage at rated current (I max) 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. R typ = Typical resistance of device in initial (un-soldered) state. R 1max = Maximum resistance of device at 20°C measured one hour after tripping or reflow soldering of 260°C for 20 sec. Caution: Operation beyond the specified rating may result in damage and possible arcing and flame. LT 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 Part Number 15LT070 15LT070S 24LT100 24LT100S 24LT100SS 24LT180 24LT180S 24LT180SS 24LT190 24LT260 24LT300 24LT310 24LT340 1.20 1.20 1.86 1.86 1.86 3.13 3.13 3.13 3.32 4.30 5.10 5.36 5.52 1.09 1.09 1.60 1.60 1.60 2.68 2.68 2.68 2.86 3.72 4.40 4.58 4.79 0.85 0.85 1.40 1.40 1.40 2.20 2.20 2.20 2.40 3.10 3.70 3.70 4.00 0.70 0.70 1.00 1.00 1.00 1.80 1.80 1.80 1.90 2.60 3.00 3.10 3.40 -20°C 0°C 20°C 40°C Hold Current (A) 0.50 0.50 0.80 0.83 0.83 1.33 1.33 1.33 1.48 1.98 2.30 2.36 2.60 0.45 0.45 0.70 0.70 0.70 1.10 1.10 1.10 1.25 1.69 1.95 2.01 2.24 0.35 0.35 0.60 0.60 0.60 0.90 0.90 0.90 1.10 1.40 1.60 1.70 1.90 0.28 0.28 0.44 0.44 0.44 0.65 0.65 0.65 0.79 1.11 1.25 1.30 1.51 0.16 0.16 0.23 0.23 0.23 0.36 0.36 0.36 0.43 0.60 0.69 0.71 0.78 50°C 60°C 70°C 85°C Average Time Current Curves Temperature Rerating Curve 190% 170% 150% Percentage of Rated Current 130% 110% 90% 70% 50% 30% 10% -40 -30 -20 -10 0 10 20 30 40 Temperature (°C) 50 60 70 80 A: 24LT100S B: 24LT180 C: 24LT190 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. LT 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 0.13mm nominal thickness, quarter-hard nickel Environmental Specifications Operating/Storage Temperature Maximum Device Surface Temperature in Tripped State Passive Aging Humidity Aging -40°C to +85°C 125°C +70°C, 1000 hours ±10% typical resistance change +85°C, 85%R.H. 7days ±5% typical resistance change MIL-LTD-883C, Condition A No change Insulating Material Polyester tape Vibration Dimensions Figure 1 SLIT A Figure 2 0.5 x 4.0 NOMINAL (.02”x .15”) A SLIT Figure 3 0.5 x 4.0 NOMINAL (.02”x .15”) A B Marking D1 D2 E B Marking D1 D2 E B Marking D1 D2 E C C C Part Number 15LT070 15LT070S 24LT100 24LT100S 24LT100SS 24LT180 24LT180S 24LT180SS 24LT190 24LT190S 24LT260 24LT300 24LT310 24LT340 A Inches mm Inches B mm 4.9 4.9 4.9 4.9 4.9 4.9 4.9 5.2 5.2 5.2 5.2 5.2 5.2 5.2 11 11 Inches C mm in. D1 mm in. D2 mm 5.5 5.5 4.1 4.1 4.1 4.1 4.1 4.1 5 5 5 6.3 5 5 Inches 0.01 0.22 0.01 0.22 0.01 0.16 0.01 0.16 0.01 0.16 0.01 0.16 0.01 0.16 0.01 0.16 0.01 0.20 0.01 0.20 0.01 0.20 0.00 0.25 0.01 0.20 0.01 0.20 E mm 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9 4.8 4.8 5.9 6 5.9 5.9 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 5.4 5.4 6.1 6.6 6.1 6.1 Fig. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min. Min. Min. Min Max. Min. Max. 0.78 0.87 19.9 22.1 0.19 0.20 0.78 0.87 19.9 22.1 0.19 0.20 0.82 0.91 20.9 23.1 0.19 0.20 0.82 0.91 20.9 23.1 0.19 0.20 0.82 0.91 20.9 23.1 0.19 0.20 0.94 1.02 0.94 1.02 0.94 1.02 24 24 24 26 26 26 0.19 0.20 0.19 0.20 0.19 0.20 Top Side 0.03 0.05 0.7 1.2 0.22 5.5 Product Series 1.2 1 1 1 1 1 1 1 1 1.1 1 1 0.22 0.16 0.16 0.16 0.16 0.16 0.20 0.20 0.20 0.25 0.20 0.20 Current Rating 0.22 0.22 0.16 0.16 0.16 0.16 0.16 0.16 0.20 0.20 0.20 0.25 0.20 0.20 1 2 1 2 3 1 2 3 1 2 1 1 1 1 0.03 0.05 LT 0.02 0.04 0.02 0.04 0.02 0.04 0.02 0.04 0.02 0.04 0.02 0.04 0.02 0.04 XXJJ 0.02 0.04 0.6 190S 0.7 0.6 0.6 0.6 0.6 0.6 0.5 0.5 0.6 0.5 0.6 0.6 5.5 4.1 4.1 4.1 4.1 4.1 5 5 5 6.3 5 5 Littelfus 4.9 ek 5.2 Trademar Lot 1 Number 0.16 4.1 (Contact Littelfuse for additional information) 0.84 0.92 21.3 23.4 0.40 0.43 10.2 0.84 0.92 21.3 23.4 0.40 0.43 10.2 0.94 1.02 0.94 1.02 0.94 1.02 24 24 24 26 26 26 1.12 1.25 28.4 31.8 0.51 0.53 13 0.43 0.47 10.8 11.9 0.02 0.04 13.5 0.02 0.04 0.58 0.63 14.8 15.9 0.02 0.04 0.58 0.63 14.8 15.9 0.02 0.04 LT Series Specifications are subject to change without notice.  Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse D2 C D1 D2 POLYFUSE Resettable PTCs ® C C Axial Leaded Strap Part Marking System Top Side Product Series Part Numbering System 24 LT 100 SS U Current Rating 190S XXJJ Littelfuse Trademark LT QUANTITY CODE: U = 500 (bulk) LEAD OPTIONS: Blank = standard S = slit lead SS = both leads slit HOLD CURRENT (VALUE DIVIDED BY 100 = HOLD CURRENT IN AMPS) SERIES VOLTAGE RATING (VDC) Lot Number (Contact Littelfuse for additional information) Packaging I hold (A) All Ratings Packaging Option Bulk Quantity 500 Quantity & Packaging Codes U LT Series Specifications are subject to change without notice.  Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse