low resistance metal element resistors lob series ultra low resistance values (0.005 to 0.1) available in 1, 3 and 5 wat rated packages tolerances from 1% to 5% inherently non-inductve (.02h at 0.5mhz) low temperature coefcient of resistance high stability over life * power dissipation - the maximum wattage rating depends upon the amount 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 ob jects will affect this transfer, this must be taken into account when selecting a resistor. low resistance metal element resistors lob series ? ultra low resistance values (0.005? to 0.1 ?) ? available in 1, 3 and 5 watt rated packages ? tolerances from 1% to 5% ? inherently non-inductive ( .02h at 0.5mhz) ? low temperature coefficient of resistance ? high stability over life dimensions (mm) type l max. d max. f min. d nom. c LOB-1 9.90.3 3.60.2 38.13.2 0.8130.05 33.27 lob-3 14.220.25 5.330.25 34.933.18 0.810.05 33.27 lob-5 23.370.25 8.380.25 31.753.18 1.020.05 42.42 general note welwyn components reserves the right to make changes in product specification without notice or liability. all information is subject to welwyn?s own data and is considered accurate at time of going to print. ? welwyn components limited bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com website: www.welwyn-tt.com LOB-1 lob-3 lob-5 continuous power dissipation at 25c in free air watts 1 3 5 overload power for 5 seconds watts 5 15 25 maximum working voltage volts 1xr 3xr 5xr maximum storage temperature c 175 175 175 electrical data physical data issue b 03.02 a subsidiary of tt electronics plc welwyn components 104 l c d f d contact point contact point description lob? series power precision metal element resistors feature resistance values down to 0.005 ? with virtually no inductance. available in 1, 3 and 5 watt rated axial leaded packages, these resistors are compatible with automatic insertion equipment. applications ? switchmode and linear power supplies. ? automotive current-sensing circuits. ? instrumentation. construction lob? series resistors feature tinned copper leads welded directly to a low temperature coefficient resistance element in a highly automated proprietary process. the leaded resistor elements are then encapsulated in a moulding compound. resistors all pb-free parts comply with eu directve 2011/65/eu (rohs2) low resistance metal element resistors lob series www .bitechnologies.com www .ir ctt.com www .welwyn-tt.com general note tt electr onics r eserves the right to make changes in pr oduct speci?cation without notice or liability . all information is subject to tt electr onics? own data and is consider ed accurate at time of going to print. ? tt electr onics plc 11. 11 ultra low r esistance values (0.005 to 0.1 ) a vailable in 1, 3 and 5 watt rated packages t olerances fr om 1% to 5% inher ently non-inductive ( .02h at 0.5mhz) low temperatur e coef?cient of r esistance high stability over life * power dissipation - the maximum wattage rating depends upon the amount of heat which can be transferr ed to the surr oundings w hile not exceeding the maximum element temperatur e. ambient air temperatur e, velocity of cooling air , thermal r esistance of heat and the temperatur e of surr ounding ob jects will a this transfer , this must be taken into account when selecting a r esistor . low resist a n c e m e t a l ele ment resist o r s l o b s e r i e s ? ultra low r esistance values (0.005 to 0.1 ) ? a vailable in 1, 3 and 5 watt rated packages ? t olerances fr om 1% to 5% ? inher ently non-inductive ( .02h at 0.5mhz) ? low temperatur e coe of r esistance ? high stability over life dimensions (mm) t ype l max. d max. f min. d nom. c LOB-1 9.90.3 3.60.2 38.13.2 0.8130.05 33.27 lob-3 14.220.25 5.330.25 34.933.18 0.810.05 33.27 lob-5 23.370.25 8.380.25 31.753.18 1.020.05 42.42 general note w elwyn components r eserves the right to make changes in pr oduct without notice or liability . all information is subject to w elwyn? s own data and is consider ed accurate at time of going to print. ? w elwyn components limited bedlington, northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com LOB-1 lob-3 lob-5 continuous power dissipation at 25c in fr ee air watts 1 3 5 overload power for 5 seconds watts 5 15 25 maximum working voltage volts 1xr 3xr 5xr maximum storage temperatur e c 175 175 175 e l e c tric a l d a t a physic a l d a t a issue b 03.02 a subsidiary of tt electr onics plc w elwyn components 104 l c d f d contact point contact point description lob series power pr ecision metal element r esistors featur e r esistance values down to 0.005 with virtually no inductance. a vailable in 1, 3 and 5 watt rated axial leaded packages, these r esistors ar e compatible with automatic insertion equipment. applications ? switchmode and linear power supplies. ? automotive curr ent-sensing cir cuits. ? instrumentation. construction lob series r esistors featur e tinned copper leads welded dir ectly to a low temperatur e coe r esistance element in a highly automated pr oprietary pr ocess. the leaded r esistor elements ar e then encapsulated in a moulding compound. * power dissipation - the maximum wattage rating depends upon the amount of heat which can be transferr ed to the surr oundings w hile not exceeding the maximum element temperatur e. ambient air temperatur e, velocity of cooling air , thermal r esistance of heat and the temperatur e of surr ounding objects will a this transfe r , this must be taken into account when selecting a r esistor . low res i s t a n c e m e t a l element r e sistor s l o b s e r i e s ? ultra low r esistance values (0.005 to 0.1 ) ? a vailable in 1, 3 and 5 watt rated packages ? t olerances fr om 1% to 5% ? inher ently non-inductive ( .02h at 0.5mhz) ? low temperatur e coe of r esistance ? high stability over life dimensions (mm) t ype LOB-1 9.90.3 l d f d c nom 33.27 0.8130.05 38.13.2 3.60.2 lob-3 14.220.25 5.330.25 34.933.18 33.27 0.810.05 lob-5 23.370.25 42.42 1.020.05 31.753.18 8.380.25 general note w elwyn components r eserves the right to make changes in pr oduct without notice or liability . all information is subject to w elwyn? s own data and is consider ed accurate at time of going to print. ? w elwyn components limited bedlington, northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com LOB-1 lob-3 lob-5 continuous power dissipation at 25c in fr ee air watts 1 3 5 overload power for 5 seconds watts 5 15 25 maximum working voltage volts 1xr 3xr 5xr maximum storage temperatur e c 175 175 175 e l e c t r i c a l d a t a phy s i c a l d a t a issue b 03.02 a subsidiary of tt electr onics plc w elwyn components 104 l c d f d contact point contact point description lob series power pr ecision metal element r esistors featur e r esistance values down to 0.005 with virtually no inductance. a vailable in 1, 3 and 5 watt rated axial leaded packages, these r esistors ar e compatible with automatic insertion equipment. applications ? switchmode and linear power supplies. ? automotive curr ent-sensing cir cuits. ? instrumentation. construction lob series r esistors featur e tinned copper leads welded dir ectly to a low temperatur e coe r esistance element in a highly automated pr oprietary pr ocess. the leaded r esistor elements ar e then encapsulated in a moulding compound. 05.16 general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc www.ttelectronicsresistors.com bi technologies irc welwyn
low resistance metal element resistors lob series low resistance metal element resistors lob series www.bitechnologies.com www.irctt.com www.welwyn-tt.com general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc 11. 11 0 25 50 75 100 400 300 200 100 0 resistance (ohms x 10 -3 ) temperature coefficient of resistance (ppm/ c) low resistance metal element resistors lob series ? welwyn components limited bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com website: www.welwyn-tt.com 105 issue b 03.02 welwyn components % x am 202 dts - l im t set ? t i nu *r % %1 801 doh t em ) s r uoh 0002 ( e f i l dao l ? r % %1 701 doh t em k coh s l amr eht ? r % %5.0 402 doh t em noi tarbiv ? r % %5.0 312 doh t em kcohs l ac i nahcem ? r % %5.0 103 doh t em htgnerts ci rtceleid ? r 01> 203 doh t em ecnats i ser noi talusni 11 ohms 0 25 50 75 100 125 150 175 100 90 80 70 60 50 40 30 20 10 0 ambient temp ( c) rated power (%) power derating percentage vs free air ambient temperature temperature coefficient of resistance vs resistance value *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 - l o b 3 ? r 0 1 j i type value (use iec62 code) tolerance (use iec62 code) f 1% j 5% h 3% note: 1% & 5% preferred packing i tape lob1 3500/reel standard lob3 1250/reel lob5 800/reel lob1 lob3 lob5 51 tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. www.ttelectronicsresistors.com bi technologies irc welwyn
low resistance metal element resistors lob series o r d e r ing pr o cedur e t h i s p ro d u c t h a s t w o v a lid p a rt num bers : e u r opean ( w e lw y n ) p a r t nu m b e r: l o b3- r0 1ji ( l o b 3 , 10 m ill i o h m s 5 % , p b - f r ee) l o b 3 - r 0 1 j i 1 2 3 4 us a ( irc) p a r t nu m b e r : l o b - 3 r010flfslt ( l o b 3 , 1 0 m illio h m s 5% , p b - f r e e ) l o b - 3 r 0 1 0 f l f s l t 1 2 3 4 5 1 2 3 4 t y p e va lue tole r a n c e packing & t e r m i n a tion finis h l o b1 r = ohm s f * = 1 % i = st a n dard pac k i ng & pb - f re e l o b3 h = 3 % pb = st and a rd p a c k i n g & sn p b l o b5 j * = 5 % l o b1 t aped, 3 5 00/ re e l * p re f e rre d l o b3 t aped, 1 2 50/ re e l l o b5 t aped, 8 0 0 / re e l 1 2 3 4 5 t y p e va lue tole r a n c e t e r m ina ti on fin i s h packing l o b - 1 r = ohm s f = 1 % o m i t fo r s n pb slt = lead t ape* l o b - 3 h = 3 % l f = pb - f r e e l o b - 1 3500/ r eel l o b - 5 j = 5 % l o b - 3 1250/ r eel l o b - 5 800/ re e l bl k = bu l k * p re f e rre d LOB-1 1500/box 800/box 200/box lob-3 lob-5 05.16 general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc www.ttelectronicsresistors.com bi technologies irc welwyn
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