Features. P d max. (W) V max (Vdc) I max (A)

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1 POLY-FUSE Resettable PTs Radial Leaded > USR Series USR Series RoHS escription The USR Series radial leaded device is designed to provide overcurrent protection for US applications where space is not a concern. Features gency pprovals RoHS compliant and lead free Fast time to trip Meets all US protection requirements 40 short circuit rating Operating voltages of 6-V GENY GENY FILE NUMER E pplications omputers & peripherals ny US application R dditional Information atasheet Resources Samples Electrical haracteristics () I trip () V max (Vdc) I max () P d max. (W) Maximum Time To Trip urrent () Time (Sec.) Resistance R min (Ω) R 1max (Ω) gency pprovals R X X R X X R X X R X X R X X R X X R X X R X X R X X = Hold current: maximum current device will pass without tripping in 20 still air. I trip = Trip current: minimum current at which the device will trip in 20 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 20 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 20 measured one hour after tripping or reflow soldering of 260 for 20 sec. aution: Operation beyond the specified rating may result in damage and possible arcing and flame. WRNING 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 PPT devices These devices undergo thermal expansion under fault conditions, and thus shall be provided with adequate space and be protected against mechanical stresses ircuits with inductance may generate a voltage (L di/dt) above the rated voltage of the PPT device. 2017, Inc.

2 POLY-FUSE Resettable PTs Radial Leaded > USR Series Temperature Rerating mbient Operation Temperature Hold urrent () R R R R R R R R R verage Time urrent urves Temperature Rerating urve USR 170% 150% Time in Seconds Percentage of Rated urrent 130% 110% 90% 70% 50% 30% 10% Temperature ( ) 0.01 Note: Typical Temperature rerating curve, refer to table for derating data urrent in mperes The average time current curves and Temperature Rerating curve performance is affected by a number or variables, and these curves provided as guidance only. ustomer must verify the performance in their application. isclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. products are not designed for, and may not be used in, all applications. Read complete isclaimer Notice at , Inc.

3 POLY-FUSE Resettable PTs Radial Leaded > USR Series Soldering Parameters Physical Specifications Lead Material Soldering haracteristics Insulating Material evice Labeling imensions (mm) : Tin-plated opper clad steel.75: Tin-plated opper Solderability per MIL ST 202, Method 208 ured, flame retardant epoxy polymer meets UL 94V-0 requirements. Marked with LF, voltage, current rating, and date code. Temperature ( ) Preheating 60 min. E Soldering 5 max. Time(s) E ooling E Pre-Heating Zone Soldering Zone ooling Zone Environmental Specifications Operating/Storage Temperature Maximum evice Surface Temperature in Tripped State 125 Passive ging Humidity ging Thermal Shock -40 to , 1000 hours +85, 85% R.H., 1000 hours +85 to times Solvent Resistance MIL ST 202, Method 215 Moisture Sensivitivy Level Refer to the condition recommended by the flux manufacturer. Max. ramping rate should not exceed 4 / Sec. Max. solder temperature should not exceed 260 Time within 5 of actual Max. solder temperature within 3 5 seconds Total time from 25 room to Max. solder temperature within 5 minutes including Pre-Heating time ooling by natural convection in air. Max. ramping down rate should not exceed 6 /Sec. Level 1, J ST 020 k 0.75 to E Physical haracteristics Part Figure Inches mm Inches mm Inches mm Inches mm Inches mm Lead (dia) Number Material Max. Single Sided Max. Marking Max. Max. Typ. Typ. Min. Min. Max. Max. Inches mm 1.35 to to to 1.10 Single 0.90 to to 1.55 R to to Top 0.20 Side Sn/u R urrent 5.1 Rating Sn/uFe urrent R155 1 Rating ode 0.27 additional 6.9 (ontact additional 0.46 (ontact Sn/uFe ate for (ontact for R Sn/uFe R Sn/uFe R Sn/uFe R Sn/uFe R ottom 0.20 Side Sn/uFe R Sn/uFe (ontact (ontact (ontact 2017, Inc. (ontact (ontact (ontact

4 0.75 to POLY-FUSE Resettable PTs Radial Leaded ouble Sided > Marking USR Series 0.75 to to (ontact 0.90 to to (ontact 0.90 to 1.10 Part Marking System 0.75 to to 2.50 Single Single Sided Sided Marking 0.90 Marking to 1.10 ouble ouble Sided Sided Marking Marking ouble ouble Sided Sided Marking Marking to 2.50 to to 1.10 to to 1.55 to Voltage Rating Voltage (ontact Rating (ontact (ontact 075 Voltage Rating 075 (ontact (ontact (ontact (ontact (ontact Part Ordering Number System ottom Side Voltage Rating (ontact (ontact (ontact ottom Side Voltage Rating (ontact (ontact R 090 P R SERIES PKGING STYLE LNK: ulk R: Tape & mmo QUNTITY OE: P=2000 U=500 TYPE: =US I HOL URRENT OE (SEE TLE ELOW) R: RIL VOLTGE RTING (V) Ordering Information R075 R120 R155 R090 R110 R135 R0 R185 R250 Ordering Number () ode Packaging Option Quantity Quantity & Packaging odes R075U ulk 500 U R075PR Tape and mmo 2000 PR R120U ulk 500 U R120PR Tape and mmo 2000 PR R155U ulk 500 U R155PR Tape and mmo 2000 PR R090U ulk 500 U R090PR Tape and mmo 2000 PR R ulk 500 U R110PR Tape and mmo 2000 PR R135U ulk 500 U R135PR Tape and mmo 2000 PR R0U ulk 500 U R0PR Tape and mmo 2000 PR R185U ulk 500 U R185PR Tape and mmo 2000 PR R250U ulk 500 U R250PR Tape and mmo 2000 PR 2017, Inc.

5 POLY-FUSE Resettable PTs Radial Leaded > USR Series Tape and mmo Specifications evices taped using EI468-/IE286-2 standards. See table below and for details. imensions imension EI Mark IE Mark im. (mm) Tol. (mm) arrier tape width W W / +1.0 Hold down tape width W 4 W 0 11 min. Top distance between tape edges W 6 W 2 3 max. Sprocket hole position W 5 W / Sprocket hole diameter* / bscissa to plane(straight lead) H H /+ 3.0 bscissa to plane(kinked lead) H 0 H 0 -/+ 0.5 bscissa to top H 1 H max. Overall width w/o lead protrusion max. Overall width w/ lead protrusion max. Lead protrusion L 1 l max. Protrusion of cut out L L 11 max. Protrusion beyond hold-down tape l 2 l 2 Not specified Sprocket hole pitch P 0 P / Pitch tolerance 20 consecutive evice pitch /+ 1 Tape thickness t t 0.9 max. Tape thickness with splice t max. Splice sprocket hole alignment 0 -/+ 0.3 ody lateral deviation Δh Δh 0 -/+ 1.0 ody tape plane deviation Δp Δp 0 -/+ 1.3 Ordinate to adjacent component lead* P 1 P /+ 1.0 Lead spacing* F F /+ 0.8 *iffers from EI specification. Tape and mmo iagram p Reference plane H 1 L 1 F H 0 W W 5 4 W H H I 2 L 1 P 0 0 irection of unreeling ross section - t 2017, Inc.