Resettable Ptc Products Page 124 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 > LR Series Environmental Specifications Operating/Storage Temperature -40C to +85C Maximum Device Surface Temperature in Tripped State 125C Passive Aging +70C, 1000 hours -/+10% typical resistance change Humidity Aging +85C, 85% R.H., 7 days -/+5% typical resistance change Vibration MIL-STD-883, Method 2007, Condition A, No change Physical Specifications Terminal Material 0.13mm nominal thickness, quarter-hard Nickel Insulating Material Polyester tape Temperature Rerating Curve Average Time Current Curves 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. Note: Typical Temperature rerating curve, refer to table for derating data 0.01 0.1 1 10 1 10 100 1000 2.60 A 3.80 A 4.50 A 7.30 A Time in Seconds Current in Amperes LR 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. -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 10% 30% 50% 70% 90% 110% 130% 150% 170% Temperature (C) Percentage of Rated Current 190%

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