Open Air Sense Resistors Weld Node 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 Resistive Element Copper Leads Stand-Off Electrical Data IRC Type Power Rating (watts) Available Resistance (ohms) OAR-1TP 1W @ 85°C 0.003 ohms to 0.10 ohms OAR-3TP 3W @ 85°C 0.0025 ohms to 0.10 ohms Physical Data A .050 0.093 REF On lower ranges stand-off may be eliminated. B NOTE: Contact factory for: 1. Variations of “A” dimension. 2. Different lead diameter. Test Point (Kelvin connection) E C D A Dimensions (Inches and (mm)) IRC Type Resistance (Ohms) OAR-1TP 0.003 - 0.10 <0.005 OAR-3TP 0.005 - 0.10 A B C E F 0.275 +0.040/-0.031 0.300 max 0.125 ±0.100 0.065 +0.010/-0.005 0.040 ±0.002 (7.0 +1.0/-0.8) (7.8) (5.08 ±2.54) (1.65 +0.25/-0.13) (1.02 ±0.051) 0.275 +0.040/-0.031 1.25 max 0.125 ±0.100 0.065 +0.010/-0.005 0.040 ±0.002 (7.0 +1.0/-0.8) (32) (5.08 ±2.54) (1.65 +0.25/-0.13) (1.02 ±0.051) 0.600 +0.040/-0.020 1.25 max 0.125 ±0.100 0.065 +0.010/-0.005 0.040 ±0.002 (15.24 +1.020/0.508) (32) (5.08 ±2.54) (1.65 +0.25/-0.13) (1.02 ±0.051) General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC’s own data and is considered accurate at time of going to print. Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com A subsidiary of TT electronics plc OAR-TP Series Issue November 2008 Sheet 1 of 2 Open Air Sense Resistors Features: Operating Characteristics: • Welded construction • Load life @ 25°C (1000 hrs): 1% max. • Flameproof • Moisture no load (1000 hrs): 1% max. • Inductance less than 10 nanohenries • Temperature cycle @ -40°C & +125°C (1000 cyc): 1% max. Applications: • Current sensing • Feedback • Low inductance • Surge and pulse Ordering Data Sample Part No. OAR-TP 1 R100 J LF IRC Style Power Rating in Watts Resistance Range Tolerance RoHS Indicator Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com OAR-TP Series Issue November 2008 Sheet 2 of 2