Positive Temperature Coefficient devices (PTCs) 2017 by Littelfuse

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


Page 66 of Positive Temperature Coefficient devices (PTCs) 2017

poly-fuse® resettable ptcs radial leaded usbr series usbr series rohs description • the usbr series radial leaded device is designed to provide overcurrent protection for usb applications where space is not a concern features • rohs compliant and lead–free • fast time–to–trip • meets all usb protection requirements agency approvals agency • 40a short circuit rating •o  perating voltages of 6-16v applications agency file number • computers peripherals • any usb application e183209 r50119318 additional information datasheet samples resources electrical characteristics pd max w maximum time to trip part number i hold a 06r075b 0.75 1.30 6 40 0.3 8.00 06r120b 1.20 2.00 6 40 0.6 8.00 06r155b 1.55 2.70 6 40 0.6 7.75 2.2 16r090b 0.90 1.80 16 40 0.6 8.00 16r110b 1.10 2.20 16 40 0.7 8.00 16r135b 1.35 2.70 16 40 0.8 8.00 16r160b 1.60 3.20 16 40 0.9 8.00 i trip a v max vdc i max a current a resistance agency approvals r min Ω r 1max Ω 0.4 0.100 0.230 x 0.5 0.065 0.140 x x 0.040 0.100 x x 1.2 0.070 0.180 x x 2.3 0.050 0.140 x x 4.5 0.040 0.120 x x 9.0 0.030 0.110 x x time sec x 16r185b 1.85 3.70 16 40 1.0 8.00 10.0 0.030 0.090 x x 16r250b 2.50 5.00 16 40 1.2 8.00 40.0 0.020 0.060 x x i hold hold current maximum current device will pass without tripping in 20°c still air r min minimum 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 typ typical resistance of device in initial un-soldered state v max maximum voltage device can withstand without damage at rated current i max r 1max maximum resistance of device at 20°c measured one hour after tripping or reflow soldering of 260°c for 20 sec i max maximum fault current device can withstand without damage at rated voltage vmax pd power dissipated from device when in the tripped state at 20°c still air caution operation beyond the specified rating may result in damage and possible arcing and flame 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