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OAR-3 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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3 / 4 page Open Air Resistor Metal Element Current Sense OAR & OAR-TP Series • 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 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 The typical power derating curves are based on conservative design concepts that extend from film based products. The OAR is a solid metal alloy construction that can withstand comparably greater operating power levels than conservative design models permit. Typically the resistive alloys can withstand temperatures in excess of 300°C. Therefore, system thermal design considerations are a more significant design parameter due to the heat limitations of solder joints and/or circuit board substrate materials. Power Derating Pulse/Surge Chart @ 50 msec duration 0 10 20 30 40 50 60 70 80 90 100 700 600 500 400 300 200 Resistance (milli-ohms) 0 100 OAR-1(TP) 0 5 10 15 20 25 30 35 40 45 50 1400 1200 1000 800 600 400 Resistance (milli-ohms) 0 200 0 10 20 30 40 50 60 70 80 90 100 1400 1200 1000 800 600 400 Resistance (milli-ohms) 0 200 5(TP) - R A O 3(TP) - R A O The Surge current charts are approximations of the capabilities of the OAR product and should not be used to the exclusion of actual testing. The relative high surge currents depicted in the charts are as a result of the robust all metal welded construction and the heat carrying capability of metal. Additionally the OAR resistive wire provides large relative cross section for current flow as compared to other resistor technologies, such as thin film, thick film, or metal strip. OAR Open Air Resistor Metal Element Current Sense OAR Series Issue June 2011 Sheet 3 of 3 Make Possible 07.14 General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics’ own data and is considered accurate at time of going to print. © TT Electronics plc www.ttelectronicsresistors.com |
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