Positive Temperature Coefficient devices (PTCs) 2017 by Littelfuse

More catalogs by Littelfuse | Positive Temperature Coefficient devices (PTCs) 2017 | 128 pages | 2017-11-12

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Page 116 of Positive Temperature Coefficient devices (PTCs) 2017

poly-fuse® resettable ptcs axial lead battery strap type lt series lt series rohs 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 • low resistance • provides overcurrent protection at 100°c trip temperature • rohs compliant and lead–free • weldable nickel terminals • compact design saves board space agency approvals agency agency file number applications e183209 • rechargeable battery cell protection mobile phones laptop computers r50119583 electrical characteristics part number i hold a i trip a v max vdc i max a pd max w 24lt100 1.0 2.5 24 100 1.5 maximum time to trip agency approvals resistance current a time sec r min Ω r typ Ω r 1max Ω 5.00 7.00 0.070 0.130 0.260 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 temperature rerating ambient operation temperature -40°c -20°c 0°c 20°c part number 24lt100 40°c 50°c 60°c 70°c 85°c 0.70 0.60 0.44 0.23 hold current a 1.86 1.60 1.40 1.00 0.80 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 © 2015 littelfuse inc specifications are subject to change without notice revised 11/05/15