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 w eld node copper leads resistiv e element stand-off open air sense resistors oar-tp series ? 1, 3, & 5 watts ? resistance wire tcr 20ppm/c ? 1% or 5% tolerance (2% below 5mohm) ? lead free rohs compliant construction available ? contact factory for height specifications, application notes and resistance values below 0.0025 ohms electrical data irc type power rating (watts) available resistance (ohms) oar-1tp 1w @ 85c 0.003 ohms to 0.10 ohms oar-3tp 3w @ 85c 0.0025 ohms to 0.10 ohms physical data dimensions (inches and (mm)) irc type resistance (ohms) a b c e f oar-1tp 0.003 - 0.10 0.275 +0.040/-0.031 (7.0 +1.0/-0.8) 0.300 max (7.8) 0.125 0.100 (5.08 2.54) 0.065 +0.010/-0.005 (1.65 +0.25/-0.13) 0.040 0.002 (1.02 0.051) oar-3tp <0.005 0.275 +0.040/-0.031 (7.0 +1.0/-0.8) 1.25 max (32) 0.125 0.100 (5.08 2.54) 0.065 +0.010/-0.005 (1.65 +0.25/-0.13) 0.040 0.002 (1.02 0.051) 0.005 - 0.10 0.600 +0.040/-0.020 (15.24 +1.020/0.508) 1.25 max (32) 0.125 0.100 (5.08 2.54) 0.065 +0.010/-0.005 (1.65 +0.25/-0.13) 0.040 0.002 (1.02 0.051) c a e b d 0.093 ref a .050 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 diamete r. te st p oint (k elvin connection) oar-tp 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 sample part no. irc style power rating in watts resistance range tolerance rohs indicator ordering data oar-tp 1 r100 j lf open air sense resistors features: ? welded construction ? flameproof ? inductance less than 10 nanohenries applications: ? current sensing ? feedback ? low inductance ? surge and pulse operating characteristics: ? load life @ 25c (1000 hrs): 1% max. ? moisture no load (1000 hrs): 1% max. ? temperature cycle @ -40c & +125c (1000 cyc): 1% max. oar-tp series issue november 2008 sheet 2 of 2
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