POLY-FUSE Resettable PTCs Radial Leaded > 72R Series RoHS 72R Series Description The 72R Series is designed to provide overcurrent protection to 72Vdc maximum voltage with a maximum 40A short circuit rating. Features 72Vdc max voltage w/max Resettable feature 40A short circuit rating Ideal for a broad range of RoHS-compliant, Lead-Free general electronics using a and Halogen Free* low voltage power supply Applications Agency Approvals Load protection on wide Computer peripherals range of low voltage power General electronics supplies Agency Agency File Number Computers E183209 R50119318 Additional Information Datasheet Resources SamplesSamples Electrical Characteristics Maximum Time To Trip Resistance Agency Approvals I I V I P typ. hold trip max max d Part Number Current Time R R min 1max (A) (A) (Vdc) (A) (W) (A) (Sec.) () () 72R020X 0.20 0.40 72 40 0.41 1.00 2.20 1.830 4.400 X X 72R030X 0.30 0.60 72 40 0.49 1.50 3.00 0.880 2.100 X X 72R040X 0.40 0.80 72 40 0.56 2.00 3.80 0.550 1.290 X X 72R050X 0.50 1.00 72 40 0.77 2.50 4.00 0.500 1.170 X X 72R065X 0.65 1.30 72 40 0.88 3.25 5.30 0.310 0.720 X X 72R075X 0.75 1.50 72 40 0.92 3.75 6.30 0.250 0.600 X X 72R090X 0.90 1.80 72 40 0.99 4.50 7.20 0.200 0.470 X X 72R110X 1.10 2.20 72 40 1.50 5.50 8.20 0.150 0.380 X X 72R135X 1.35 2.70 72 40 1.70 6.75 9.60 0.120 0.300 X X 72R160X 1.60 3.20 72 40 1.90 8.00 11.40 0.090 0.220 X X 72R185X 1.85 3.70 72 40 2.10 9.25 12.60 0.080 0.190 X X 72R250X 2.50 5.00 72 40 2.50 12.50 15.60 0.050 0.130 X X 72R375X 3.75 7.50 72 40 3.20 18.75 24.00 0.030 0.080 X X CAUTION: Operation beyond the specified rating may result in damage and possible arcing and flame. I = Hold current: maximum current device will pass without tripping in 20C still air. R = Minimum resistance of device in initial (un-soldered) state. hold min I = Trip current: minimum current at which the device will trip in 20C still air. R = Typical resistance of device in initial (un-soldered) state. trip typ V = Maximum voltage the device can withstand without damage at rated current (I max) R = Maximum resistance of device at 20C measured one hour after tripping. int 1max V = The device regular operation voltage op * Effective February 11, 2010 onward, all 600R PTC products will be manufactured Halogen Free (HF). Existing I = Maximum fault current device can withstand without damage at rated voltage (V ) max max Non-Halogen Free 600R PTC products may continue to be sold, until supplies are depleted. This change will P = Power dissipated from device when in the tripped state at 20C still air. d have no effect on 600R product specifications or performance. 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. 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BO.12/07/20 POLY-FUSE Resettable PTCs Radial Leaded > 72R Series Temperature Rerating Ambient Operation Temperature -40C -20C 0C 20C 40C 50C 60C 70C 85C Part Number Hold Current (A) 72R020X 0.31 0.27 0.24 0.20 0.16 0.14 0.13 0.11 0.08 72R030X 0.47 0.41 0.36 0.30 0.24 0.22 0.19 0.16 0.12 72R040X 0.62 0.54 0.48 0.40 0.32 0.29 0.25 0.22 0.16 72R050X 0.78 0.68 0.60 0.50 0.41 0.36 0.32 0.27 0.20 72R065X 1.01 0.88 0.77 0.65 0.53 0.47 0.41 0.35 0.26 72R075X 1.16 1.02 0.89 0.75 0.61 0.54 0.47 0.41 0.30 72R090X 1.40 1.22 1.07 0.90 0.73 0.65 0.57 0.49 0.36 72R110X 1.71 1.50 1.31 1.10 0.89 0.79 0.69 0.59 0.44 72R135X 2.09 1.84 1.61 1.35 1.09 0.97 0.85 0.73 0.54 72R160X 2.48 2.18 1.90 1.60 1.30 1.15 1.01 0.86 0.64 72R185X 2.87 2.52 2.20 1.85 1.50 1.33 1.17 1.00 0.74 72R250X 3.88 3.40 2.98 2.50 2.03 1.80 1.58 1.35 1.00 72R375X 5.81 5.10 4.46 3.75 3.04 2.70 2.36 2.03 1.50 Average Time Current Curves Temperature Rerating Curve 170% USBR 250R 30R 60R 72R 600R 16R 100000 100000 100 100 100 100 150% 100000 130% 10000 10000 110% 10000 10 90% 10 10 10 1000 1000 70% 1000 50% 1 100 100 30% 1 100 1 1 10% 10 10 -40 -30 -20 -10 01020304050607080 0.1 Temperature (C) 10 1 1 0.1 0.1 0.1 Note: Typical Temperature rerating curve, refer to table for derating data 0.01 1 0.1 0.1 0.001 0.01 0.01 0.01 0.01 0.01 0.1 0.1 110 100 110100 1000 110100 1000 0.11 10 100 0.1 110 100 0.1 110 100 0.1 110100 Current in Amperes Current in Amperes Current in Amperes Current in Amperes Current in Amperes Current in Amperes Current in Amperes 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. 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BO.12/07/20 Time in Seconds 0.75A 1.20A 1.55A 0.90A 1.10A 1.35A 1.60A 1.85A 2.50A Time in Seconds 2.5 A 3.0 A 4.0 A 5.0 A 6.0 A 7.0 A 8.0 A 9.0 A 10.0 A 11.0 A 12.0 A 14.0 A Time in Seconds 0.90A 1.10A 1.35A 1.60A 1.85 A 2.50A 3.00A 4.00A 5.00A 6.00A 7.00A 8.00A 9.00A Time in Seconds 0.10A 0.17A 0.20A 0.25A 0.30A 0.40A 0.50A 0.65A 0.75A 0.90A 1.10A 1.35A 1.60A 1.85A 2.50A 3.00A 3.75A Time in Seconds 0.20A 0.30A 0.40A 0.50A 0.65A 0.75A 0.90A 1.10A 1.35A 1.60A 1.85A 2.50A 3.75A Percentage of Rated Current Time in Seconds 0.080A 0.120A 0.145A 0.180A Time in Seconds 0.15 A 0.16 A