* contact factory for values below 0r005 ohms open air sense resistors oar series 1, 3 and 5 watts ?% or ?% tolerance resistance wire tcr ?0 ppm/? resistance values down to 0r005 ohms dimensions (mm) type a b c e f oar-1 11.43 +1.020/-0.508 5.08 ?.54 3.18 ?.762 1.65 +0.254/-0.127 1.02 ?.051 oar-3 15.24 +1.020/-0.50 25.4 max. 3.18 ?.762 1.65 +0.254/0.127 1.02 ?.051 OAR-5 20.32 +1.020/-0.50 25.4 max. 3.18 ?.762 1.65 +0.254/-0.127 1.02 ?.051 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 101 oar-1 oar-3 OAR-5 power rating at 85? watts 1 3 5 resistance range ohms 0r005* to 0.10 0r005 to 0.10 0r005 to 0.05 electrical data physical data issue d ?08.04 a subsidiary of tt electronics plc welwyn components b a c f e on lower ranges stand-off may be eliminated note: contact factory for: 1. variations of ??dimension 2. different lead diameter test point (kelvin connection) oar_d.qxd 8/9/04 4:15 pm page 1
performance data open air sense resistors oar 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 102 issue d ?08.04 welwyn components maximum change load life: 1000 hrs at 25? ? r% 1 moisture no load 100 hrs ? r% 1 temperature cycle at -40? & +125? (1000 cyc): ? r% 1 features welded construction flameproof inductance less than 10 nanohenries solderable copper leads applications current sensing feedback low inductance surge and pulse packaging bulk packaging only. OAR-5 resistance 0.005 0.010 0.015 0.020 0.025 height 15.240 19.304 19.304 22.860 22.860 oar-3 resistance 0.005 0.010 0.015 0.020 0.025 0.030 0.040 0.050 0.070 0.080 0.10 height 16.002 16.510 16.510 17.018 22.098 22.860 16.002 18.288 22.860 21.590 22.860 oar-1 resistance 0.005 - 0.100 height 5.080 height standards all resistances are in ohms. all tolerances are ?.54. dimensions (mm) type oar-1 r10 f resistance value (iec62 code) tolerance (iec62 code) f1% g2% j5% ordering procedure specify type reference, value and tolerance as shown in this example of oar-1 r10 1%: oar_d.qxd 8/9/04 4:15 pm page 2
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