low value 3w chip resistors lrf3w series 3w in 1225 package resistance range from 0.003 to 0.1 tolerances to 1% aec-q200 qualifed low thermal impedance wide terminatons enhance robustness rohs compliant and snpb variants e u l a v c i t s i r e t c a r a h c power dissipation @70c 3 w atts resistance range r00 3 to 1r0 v 0 0 2 d n a t s h t i w c i r t c e l e i d ambient temp range -55 to +150c resistance tolerance low value 3w chip resistors lrf3w series low v alue 3w chip resistors lrf3w 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 04.10 welwyn components 85 performance data construction patented non-noble copper based thick film material, overglaze and organic protection are screen printed on a 96% alumina substrate. the components are laser trimmed to achieve the required resistance tolerance. terminations the wrap-around terminations have an electroplated nickel barrier and matte tin finish, this ensures excellent ?leach? resistance properties and solderability. chips can withstand immersion in solder at 250c for 90 seconds and are suitable for reflow or wave soldering mounting applications. marking the body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. chips are packed and mounted with marking side up. the lrf3w chips are mounted with the actual resistor element mounted face down on its termination pads. packaging lrf3w resistors are supplied taped and reeled as per iec 286-3. the standard quantity per reel is 1800 parts. notes: 1. full aec-q200 qualification applies to ohmic values r02. tape dimensions in mm w p1 p0 p2 d0 d1 e f a0 b0 k0 t t1 t2 0.3 0.1 0.1 0.05 0.1 0.2 0.1 0.05 0.1 0.1 0.1 0.05 nom 0.15 lrf3w 12 8 4 2 1.5 1.5 1.75 5.5 3.61 6.96 1.17 0.28 0.06 1.45 2.5 0.5 13 0.5 33 1.0 marking (both sides) 0.8 0.15 80 2 178 2 13 0.5mm p 1 a 0 b 0 d 1 d 0 p 0 p 2 g f w e t 2 t 1 k 0 t aec-q200 table 7 method max. (add r05) typ. (@r20) ref test 3 high temp. exposure mil-std-202 method 108 r% 0.5 0.2 4 temperature cycling jesd22 method ja-104 r% 0.25 0.1 6 moisture resistance mil-std-202 method 106 r% 0.5 0.2 7 biased humidity mil-std-202 method 103 r% 0.5 0.2 8 operational life (cyclic load) mil-std-202 method 108 r% 1 0.5 14 vibration mil-std-202 method 204 r% 0.5 0.05 15 resistance to soldering heat mil-std-202 method 210 r% 0.25 0.05 16 thermal shock mil-std-202 method 107 r% 0.25 0.1 18 solderability j-std-002 >95% coverage 21 board flex aec-q200-005 r% 0.5 0.2 22 terminal strength aec-q200-006 r% 0.25 0.1 short term overload 6.25 x pr for 2s r% 0.5 low temperature storage -65c for 100 hours r% 0.5 shelf life test room temp for 12 months r% 0.1 leach resistance solder dip at 250c 90s minimum 0 20 40 60 80 100 0 20 40 60 80 100 120 140 160 p/pr (%) ambient temperature ( c) temperature derating thermal data 10 100 100 1000 temperature rise ( c) pcb copper area per termination (mm 2 ) temperature rise 1w 3w 2w 09.16 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
low value 3w chip resistors lrf3w series pulse power data 1 10 100 0.01 0.1 1 10 peak power (w) pulse duration(s) pulse power type lrf3w r005 g w resistance value (iec62 code) tolerance (iec62 code) packing low v alue 3w chip resistors lrf3w 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 04.10 welwyn components 86 f 1% g 2% j 5% or dering pr ocedure specify type reference, value , tolerance and packing as shown in this example of lrf3w 5m 2% on a reel of 1800 pieces: w tape lrf3w 1800/reel standard ordering procedure this product has two valid part numbers: european (welwyn) part number : lr f 3w - r02fw ( 2 0 milli ohms 1% , pb - free) l r f 3 w - r 0 2 f w 1 2 3 4 usa (irc) part number: lrc - lrf 3w lf - 01- r02 0 - f ( 2 0 milli ohms 1% , pb - free ) l r c - l r f 3 w l f - 0 1 - r 0 2 0 - f 1 2 3 4 5 6 electrical data lrf3w power rating @70c watts 3 resistance range 1 ohms r003 to r10 resistance tolerance % |
