general note irc reserves the right to make changes in product speci cation without notice or liability. all information is subject to irc s 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 weld node copper leads resistive 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) abc 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 0.197 +0.040/-0.031 (5.0 +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) c a e b d 0.093 ref a .050 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) oar-tp series issue june 2010 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 june 2010 sheet 2 of 2
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