Low Resistance Metal Low Resi sResistor tance Metal Resistors Element s Low R es is tance Metal Low Resistance Metal E lement Resiors s tors Eleme nt R esist Element Resistors Low Resistance Metal LOB Serie s LOB S eries Resistors Element LOB Series * Ultra low resistance values LOB S eries Welwyn Components Welwyn Components Welwyn Components (0.005 tovalues 0.1) * Ultralowresistancevalues *LOBUltra lowresistance Series * Ultralowresistancevalues 0.1 ) 5 watt rated packages Available in 1, 3 and * (0.005 (0.005 to 0.1 )to (0.005 to 0.1 ) Ultra low resistance values 3 and5 wattratedpackages ** Available * (0.005 Available in 1,in 3 1, and 5 watt rated packages Tolerances from 1% to 5% to 0.1) Available in 1, 3 and5 wattratedpackages * * Available Tolerances rom f 1% to 5%5% (.02H at 0.5MHz) from 1%to ** Tolerances Inherently non-inductive infrom 1, 3 and 5 5% rated packages 1%to ** Tolerances Inhe rently non-inductive ( .02H at 0.5MHz) Inhe rentlynon-inductive ( .02Hat 0.5MHz) * Low temperature Tolerances from 1% to 5%coefficient of resistance * ** Inhe Lowrentlynon-inductive temperatu re coefficient of resistance ( .02Hat 0.5MHz) re coe ofresistance ** Lowtemperatu Inherently (.02H High stability over life at 0.5MHz) ** Lowtemperatu High stability over life r e coe ofresistance Highstabilityoverlifeof resistance Low*temperature overlife * Highstability life High stability over All Pb-free parts comply with EU Electrical Data E lectrical Data E lectrical Data Continuous power dissipation at 25C in free air Continuous power dissipation at 25Cin free air Overload power for 5 seconds Continuous powerpower dissipation at 25Cin free air Overload for 5 seconds Maximum working voltage OverloadMaximum power forworking 5 seconds voltage Operating temperature Maximum workingstorage voltage temperature Maximum watts watts volts watts watts LOB-1 watts 1 watts volts 5 volts C C 1xR LOB-1 LOB-1 1 1 5 5 1xR 1xR -55 to 175 175 2011/65/EU (RoHS2) LOB-3 LOB-5 LOB-3 LOB-5 3 5 LOB-3 LOB-5 3 5 15 25 3 5 15 25 3xR 5xR 15 25 3xR 5xR -55 to 175 -55 to 175 3xR 5xR 175 175 * Power Dissipation - The maximum wattage rating depends upon the amount of heat which can be transferred-55 to the while not exceeding the maximum element Operating temperature to surroundings 175 *Power Dissipation - The maximum wattage rating depends upon the amountC of heat which can be transferred to the surroundings w hile not exceeding the maximum element temperature. Ambient air temperature, velocity of cooling air, thermal resistance of heat and the temperature of surrounding objects will affect this transfer, this must be taken this transfer, this must be taken temperature. Ambient air temperature, velocity of cooling air, thermal resistance of heat and the temperature of surrounding ob jects will a into account selecting a resistor. *Power Dissipation - Thewhen maximum wattage rating depends upon the amount of heat which can be transferred to the surroundings while not exceeding the maximum element into account when selecting a resistor. temperature. Ambient air temperature, velocity of cooling air, thermal resistance of heat and the temperature of surrounding objects will a this transfer, this must be taken into account when selecting a resistor. Physical Data Phys ical Data P hysDimensions ical Data Dimensions (mm) (mm) contact point contact point Dimensions (mm) Type max. Type LLmax. max. f min. d nom. d nom. DDmax. f min. C C Type L LOB-1 9.90.3 3.60.2 38.13.2 0.8130.05 LOB-1 9.90. 3 D 3.60. 2 f 38.13. 2 d0.8130.0 5C nom 33.27 33.27 LOB-1 LOB-3 0.8130.05 38.13.2 9.90.3 3.60.2 14.220.2 5 5.330.2 5 34.933.1 8 0.810.0 5 33.27 33.27 33.27 LOB-3 14.220.25 5.330.25 34.933.18 0.810.05 LOB-3 14.220.25 34.933.18 5.330.25 0.810.05 LOB-5 5 8.380.2 5 31.753.1 8 1.020.0 5 33.27 42.42 42.42 LOB-5 23.370.2 23.370.25 8.380.25 31.753.18 1.020.05 LOB-5 23.370.25 8.380.25 31.753.18 1.020.05 contact point contact point C d d D d D D L contact point contact point C C L L f f f 42.42 Description Construction Description Construction LOB metal element resistors feature LOB Series resistors feature tinned copper leads welded Description Construction LOB Series Seriespower powerprecision precision metal element resistors feature LOB Series resistors feature tinned copper leads welded resistance toto 0.005 resistors with virtually nono directly to ato low coe leads resistance element in LOB Series power values precision metal element feature LOB Series resistors feature copper welded resistance valuesdown down 0.005 with virtually directly a temperature lowtinned temperature coefficient resistance element in inductance. Available in 1, 3 and 5 watt rated axial leaded a highly automated proprietary process. The leaded resistor resistance values down to 0.005 with virtually no directly to a low temperature coe resistance element in inductance. Available in 1, 3 and 5 watt rated axial leaded a highly automated proprietary process. The leaded resistor packages, these compatible with automatic elements areproprietary then encapsulated a moulding compound. inductance. Available in resistors 1, 3 and are rated axial leaded process.in The leaded resistor packages, these resistors5 watt are compatible with automatic a highly automated elements are then encapsulated in a moulding compound. insertion equipment. packages, these resistors are compatible with automatic elements are then encapsulated in a moulding compound. insertion equipment. insertion equipment. Applications Applications Applications * Switchmode and linear power supplies. * * * * * * Switchmode and linear power supplies. Switchmode and linear power supplies. current-sensing circuits. * Automotive Automotive current-sensing circuits. Automotive current-sensing circuits. * Instrumentation. Instrumentation. Instrumentation. GeneralNote Welwyn Components reserves the right to make changes in product without notice or liability. General Note General N ote General Note GeneralAll Note information is subject to Welwyn's own data and is considered accurate at time of going to print. 104 BI Technologies IRC Welwyn A subsidiary of Welwyn Components reserves the reserves right to make changes in product without notice orwithout liability.notice or liability. Welwyn Components the right to make changes in product specification TT electronics plc TT electronics reserves the right to make changes in product specification without notice or liability. A subsidiary of A subsidiary of All information is subject to Welwyn' s own data and is considered accurate at time of going to print. All information is subject to is TTsubject Electronics' own data own and* is considered at time of going to print. AllWelwynComponents information toLimited Welwyn's data and is accurate considered accurate at time of going to print. (c) Bedlington, 7AA,UK All information is subject to TT electronics' own data and is consideredNorthumberland accurate at timeNE22 of going to print. www.ttelectronicsresistors.com TT electronics plc TT electronics plc www.bitechnologies.com www.irctt.com www.welwyn-tt.com Issue B * 03.02 Telephone: +44 (0) 1670822181* Facsimile: +44 (0) 1670829465* Email: info@welwyn-tt.com* Website: www.welwyn-tt.com (c)TT WelwynComponents Limited * Limited Bedlington,* Northumberland NE22 7AA,UK NE22 7AA, UK (c) Welwyn Bedlington, Northumberland (c) Electronics plc Components Issue B * 03.02 Telephone: +44 (0) 1670822181* Facsimile: +44 (0) 1670829465* Email: info@welwyn-tt.com* Website: www.welwyn-tt.com (c) TT elect ronics plc Issue B * 03.02 Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com 104 08.16 11. 11 Low Metal LowResistance Resistance Low Resistance MetalMetal Element Resistors Element Resistors Element Resistors LOB Series LOB LOB Series Series Welwyn Components Power derating percentage vs Free air ambient temperature Temperature coefficient of resistance vs Resistance value Temperature Coefficient of resistance (ppm/C) 100 Rated Power (%) 90 80 70 60 50 40 30 20 10 0 0 25 50 75 100 125 150 400 LOB1 LOB3 300 200 LOB5 100 0 175 0 25 50 Resistance (ohms x Ambient Temp (C) 75 100 10-3) Test MIL-STD 202 MAX % R* Unit Load life (2000 hours) Method 108 1% %R Thermal shock Method 107 1% %R Vibration Method 204 0.5% %R Mechanical shock Method 213 0.5% %R Dielectric strength Method 301 0.5% %R Insulation resistance Method 302 >1011 ohms *0.0005 ohm allowance for test/contact error. Packaging Resistors are supplied taped and reeled. Bulk packaging available. Ordering Procedure Example: LOB3 at 10 milliohms and 5% tolerance on a reel of 1250 pieces LOB3- R01JI Type Value (use IEC62 code) Tolerance (use IEC62 code) F H 1% 3% J 5% Note: 1% & 5% preferred Packing I Tape General Note General Note LOB1 LOB3 LOB5 3500/reel 1250/reel 800/reel Standard TT electronics Electronics reserves make changes in product specification without noticenotice or liability. TT reservesthe theright righttoto make changes in product specification without or liability. All information TTTT Electronics' own data andand is considered accurate at time of going to print. All informationisissubject subjecttoto electronics' own data is considered accurate at time of going to print. BI Technologies IRC Welwyn www.ttelectronicsresistors.com www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK (c) TT TT Electronics plcplc822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com Telephone: +44 (0) 1670 (c) electronics Issue B * 03.02 08.16 11. 11 105 Low Resistance Metal Element Resistors LOB Series Ordering Procedure This product has two valid part numbers: European (Welwyn) Part Number: LOB3-R01JI (LOB3, 10 milliohms 5%, Pb-free) L O B 3 - R 1 0 1 2 1 2 Type Value J I 3 4 3 LOB1 R = ohms LOB3 LOB5 4 Tolerance Packing & Termination Finish F* = 1% I = Standard packing & Pb-free H = 3% PB = Standard packing & SnPb J* = 5% LOB1 Taped, 3500/reel * preferred LOB3 Taped, 1250/reel LOB5 Taped, 800/reel USA (IRC) Part Number: LOB-3R010FLFSLT (LOB3, 10 milliohms 5%, Pb-free) L O B - 3 R 0 1 1 2 1 2 Type Value LOB-1 R = ohms LOB-3 LOB-5 3 0 F 3 L F S 4 4 Omit for SnPb LF = Pb-free T 5 5 Tolerance Termination Finish F = 1% H = 3% J = 5% L Packing SLT = Lead Tape* LOB-1 3500/reel LOB-3 1250/reel LOB-5 800/reel BLK = Bulk LOB-1 1500/box LOB-3 800/box LOB-5 200/box preferred * General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. BI Technologies IRC Welwyn www.ttelectronicsresistors.com (c) TT Electronics plc 08.16 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: TT Electronics: LOB3R040J LOB3R020J LOB3R025J LOB3R100J LOB1R070J LOB5R005J LOB5R025F LOB5R020J LOB5R020F LOB5R025J LOB5R010J LOB1R040J LOB3R010F LOB3R010J LOB3R015J LOB3R025FTR LOB3R010FTR LOB5R070J LOB5R020FTR LOB3R080J LOB3R050FTR LOB3R030J LOB5R080J LOB1R050J LOB3R080HTR LOB1R010J LOB1R025J LOB3R005F LOB-10.051%BLK LOB5R100J LOB5R100F LOB5R050J LOB5R050F LOB1R030J LOB5R040J LOB3R050F LOB3R005JLF LOB1R080J LOB5R015J LOB5R030J LOB3R050JLF LOB5R050JLF LOB1R050JLF LOB3R030JLF LOB1R030JLF LOB5R030JLF LOB1R025JLF LOB5R025JLF LOB3R025JLF LOB3R010JLF LOB5R010JLF LOB1R010JLF LOB5R033FLF LOB5R040JLF LOB1R040JLF LOB3R040JLF LOB3R100JLF LOB5R100JLF LOB1R020JLF LOB5R020JLF LOB3R020JLF LOB3R050FLFTR LOB1R005F LOB3R025FLFTR LOB1R005FLFTR LOB3R030FLF LOB1R005FTR LOB3R005FLF LOB3R005FTRLF LOB3R010FLF LOB3R010FTR-LF LOB3R020FLF LOB3R040FLF LOB3R050FLF LOB3R060FTR LOB3R070F LOB3R100FLF LOB5R005F LOB5R010F LOB5R020FLF LOB5R020FLFTR LOB5R030F LOB5R040FLF LOB1R080JLF LOB3R080JLF LOB3R070JLF LOB5R070JLF LOB1R070JLF LOB3R015JLF LOB5R015JLF LOB1R005JLF LOB5R005JLF LOB5R010FLF LOB5R025FLF LOB5R100FLF LOB5R005FLF LOB3R030HLF LOB5R050FLF LOB5R030FLF