Resettable Ptc Products Page 126 Resettable PTC Products

POLY-FUSE Resettable PTCs 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/22/17 Axial Lead Battery Strap Type > LT Series The new LT Series device provides reliable, noncycling protection against overcharging and short circuits events for rechargeable battery cells where resettable protection is desired. Electrical Characteristics Part Number I hold (A) I trip (A) V max (Vdc) I max (A) P d max. (W) Maximum Time To Trip Resistance Agency Approvals Current (A) Time (Sec.) R min ( ) R typ ( ) R 1max ( ) 24LT100 1.0 2.5 24 100 1.5 5.00 7.00 0.070 0.130 0.260 X I hold = Hold current: maximum current device will pass without tripping in 20C still air. I trip = Trip current: minimum current at which the device will trip in 20C 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 (V max ) P d = Power dissipated from device when in the tripped state at 20C 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 20C measured one hour after tripping or reflow soldering of 260C for 20 sec. Caution: Operation beyond the specified rating may result in damage and possible arcing and flame. Description Features Applications RoHS compliant and lead-free Weldable Nickel terminals Compact design saves board space Low resistance Provides overcurrent protection at 100C trip temperature Rechargeable battery cell protection - Mobile phones - Laptop computers Agency Approvals Ambient Operation Temperature -40C -20C 0C 20C 40C 50C 60C 70C 85C Part Number Hold Current (A) 24LT100 1.86 1.60 1.40 1.00 0.80 0.70 0.60 0.44 0.23 Temperature Rerating RoHS LT Series WARNING Users shall independently assess the suitability of these devices for each of their applications Operation of these devices beyond the stated maximum ratings could result in damage to the devices and lead to electrical arcing and/or fire These devices are intended to protect against the effects of temporary over-current or over-temperature conditions and are not intended to perform as protective devices where such conditions are expected to be repetitive or prolonged in duration Exposure to silicon-based oils, solvents, electrolytes, acids, and similar materials can adversely affect the performance of these PPTC devices These devices undergo thermal expansion under fault conditions, and thus shall be provided with adequate space and be protected against mechanical stresses Circuits with inductance may generate a voltage (L di/dt) above the rated voltage of the PPTC device. AGENCY AGENCY FILE NUMBER E183209 R50119583

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