general note irc reserves the right to make changes in product speci?cation without notice or liability. all information is subject to ircs own data and is considered accurate at time of going to print. a subsidiary of tt electronics plc ? 4222 south staples street ? corpus christi texas 78411 usa wire and film technologies division telephone: 361 992 7900 ? facsimile: 361 992 3377 ? website: www.irctt.com ??????? ????? ????? ???? ????????? ??????? ????????? open air current sense resistors oar series ? tcrs to 20ppm/c ? power ratings of 1, 3, & 5w @ 85c ? resistance range from 2.5m ? to 100m ? ? open air design maximizes thermal performance ? welded copper leads minimize effects from solder wicking and provide true 1% performance electrical data part number power rating @ 85c (watts) resistance range (m ? ) tolerance (%) tcr (ppm/c) inductance (nh) oar-1 1.0 3, 5, 10, *20, *25, 50 1, 21, 5 20 <10 oar-3 3.0 2.5, 5, 10, 15, 20, 25, *30, 50, 100 oar-5 5.0 3, 5, 10, *15, *20, *25, *50 notes: 1 2% tolerance available <0.005m ? * denotes resistance values that may have longer lead times than other values listed * please contact factory for resistance values not listed load life (1000 hours @ 25c) ? r/r <1% moisture (no load for 1000 hours) ? r/r <1% temperature cycling (-40c to +125c for 1000 cycles) ? r/r <1% operating temperature -40c to +125c environmental data features: ? welded construction ? flameproof ? inductance less than 10 nanohenries ? solderable copper leads (60/40) applications: ? current sensing ? feedback ? low inductance ? surge and pulse oar series issue november 2008 sheet 1 of 2
? 4222 south staples street ? corpus christi texas 78411 usa wire and film technologies division telephone: 361 992 7900 ? facsimile: 361 992 3377 ? website: www.irctt.com physical data dimensions (inches and (mm)) irc type a b c e f oar-1 0.450 +0.040/-0.020 (11.43 +1.020/-0.508) 0.200 0.100 (5.08 2.54) 0.125 0.030 (3.18 0.762) 0.065 +0.010/-0.005 (1.65 +0.254/-0.127) 0.040 0.002 (1.02 0.051) oar-3 0.600 +0.040/-0.020 (15.24 +1.020/0.508) 0.600 typ (15.3 max.) 0.125 0.030 (3.18 0.762) 0.065 +0.010/-0.005 (1.65 +0.254/-0.127) 0.040 0.002 (1.02 0.051) oar-5 0.800 +0.040/-0.020 (20.32 +1.020/-0.508) 0.350 typ (8.9 max.) 0.125 0.030 (3.18 0.762) 0.065 +0.010/-0.005 (1.65 +0.254/-0.127) 0.040 0.002 (1.02 0.051) sample part no. irc style oar power rating in watts 1 = 1w 3 = 3w 5 = 5w resistance range r indicates decimal point location tolerance f = 1%, g = 2%, j = 5% rohs indicator lf indicates rohs compliance blank indicates sn/pb terminal tinning; available on special request ordering data oar 1 r100 f lf open air current sense resistors b c a e f on lo wer ranges stand-off ma y be eliminated no te : contact f actor y fo r: 1. va r iations of a dimension. 2. diff erent lead diameter . te st po int (k elvin connection) oar series issue november 2008 sheet 2 of 2
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