h l d d 1 w h w d l protective overcoat resistive element copper termination solder plating nickel barrier layer alumina substrate copper wraparound termination lr 1225 lr 1206 / 2010 / 2512 low value flat chip resistor lrc/lrf series standard 2512, 2010 and 1206 sizes resistance values down to 0.003 ohms leach resistant solder-plated copper wrap-around termination low inductance - less than 0.2nh standard eia tape - 1206 = 8mm; 2010 or 2512 = 12mm 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 electrical data physical data issue e ?12.04 a subsidiary of tt electronics plc welwyn components 23 LR1206 lr2010 lr2512 power rating at 70? watts 0.5 1.0 1.5/2.0* resistance range ohms 0r010 to 1r 0r003 to 1r 0r003 to 1r dielectric withstanding voltage volts 200 200 200 tcr ppm/? ?00 (contact factory for value below 0.050 ohms) resistance tolerance % r005 5%, >r005 1, 2, 5% temperature rise at rated power ? 40 80 90 pad and trace area for max power rating @ 70? mm 2 30 30 100 *2 watts with total solder pad and trace size of 300 mm 2 dimensions (mm) size l w h (max) d d1 LR1206 3.20?.305 1.63?.203 0.8 0.48?.25 0.48?.25 lr2010 5.23?.38 2.64?.25 0.8 0.48?.25 0.48?.25 lr2512 6.50?.38 3.25?.25 0.8 0.48?.25 0.48?.25 lrc-lrf_e.qxd 12/23/04 10:07 am page 1
low value flat chip resistor lrc/lrf 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 issue e ?12.04 welwyn components 24 characteristics test method performance thermal shock mil-std-202 method 107 ?.5% condition b, -65? +125? short time mil-prf-55342 ?.5% overload high temperature mil-prf-55342 ?.5% exposure temperature mil-std-883 method 1010 ?.25% cycling test condition b moisture mil-prf-55342 ?.5% load life mil-prf-55342 ?.0% rated power @ 70? low temperature mil-prf-55342 ?.5% operation low temperature -65?, 100 hours ?.5% storage resistance to mil-std-202 method 210 ?.25% solder heat leach resistance molten solder 250? 90 seconds minimum 100 80 60 40 20 0 (%) 25 70 150 ( c) ambient temperature power rating lrc 2512 1 w att lrc 2512 1 watt lrc 2512 2 w att lrc 2010 0.5 watt lrc 2010 0.5 watt lrc 2010 1 w att lr c 1206 0.25 w att lrc 1206 0.25 watt lr c 1206 0.5 w att dimensions (mm) abc LR1206 2.0 4.0 1.25 lr2010 3.05 6.5 1.5 lr2512 3.7 7.75 1.5 note: for resistance values r025 and below part will be supplied as type lrf. components must be mounted with resistance value marking face up. to ensure correct resistance value and tolerance. packaging resistors are supplied tape and reel as per iec 286-3. type 1206 2010 reel 3,000 3,000 a c b type LR1206 ir0 f resistance value (iec62 code) tolerance (iec62 code) ordering procedure specify type reference, value and tolerance as shown in this example of LR1206 1r 1%: f1% g2% j5% lrc-lrf_e.qxd 12/23/04 10:07 am page 2
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