electrical data oar-1 oar-3 oar-5 power rating at 85c watts 1 3 5 resistance range ohms 0r005* to 0.10 0r005 to 0.10 0r005 to 0.05 * contact factory for values below 0r005 ohms physical data dimensions (mm) type abc e f oar-1 11.43 +1.020/-0.508 5.08 2.54 3.18 0.762 1.65 +0.254/-0.127 1.02 0.051 oar-3 15.24 +1.020/-0.50 25.4 max. 3.18 0.762 1.65 +0.254/0.127 1.02 0.051 oar-5 20.32 +1.020/-0.50 25.4 max. 3.18 0.762 1.65 0.254/-0.127 1.02 0.051 b a c f e open air sense resistors oar series c 1, 3 and 5 watts c 1% or 5% tolerance c resistance wire tcr 20 ppm/c c resistance values down to 0r005 ohms ? welwyn components limited bedlington, northumberland ne22 7aa, england tel: 01670 822181 fax: 01670 829465 web: http://www.welwyn-tt.co.uk issue a 07/9 9 general note welwyn components reserves the right to make changes in product specification without notice or liability. all information is subject to welwyns own data and is considered accurate at time of going to print. on lower ranges stand-off may be eliminated note: contact factory for: 1. variations of a dimension 2. different lead diameter test point (kelvin connection) height standards all resistances are in ohms. all tolerances 0.100. dimensions (mm) oar-1 resistance 0.005 - 0.100 height 5.080 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-5 resistance 0.005 0.010 0.015 0.020 0.025 height 15.240 19.304 19.304 22.860 22.860 101
open air sense resistors oar series ? welwyn components limited bedlington, northumberland ne22 7aa, england tel: 01670 822181 fax: 01670 829465 web: http://www.welwyn-tt.co.uk issue a 07/9 9 features c welded construction c flameproof c inductance less than 10 nanohenries c solderable copper leads (60/40) applications c current sensing c feedback c low inductance c surge and pulse packaging bulk packaging only. performance data maximum change load life: 1000 hrs at 25c ? r% 1 moisture no load 100 hrs ? r% 1 temperature cycle at -40c & +125c (1000 cyc): ? r% 1 102
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