01 of 03 preview in response to requests from power electronics design engineers with the means to squeeze more current-sensing capability into crowded power supply designs, token electronics has developed a tight pitch version of its open air metal element current sensing resistor with ratings as high as 5w in a reduced pc board footprint and longer thermal path. designated the oar series, these open-air through-hole devices offer a high current, fameproof alternative to conventional axial devices and fat chips for current-sense circuits where pc board space is at a premium. the resistors footprint is reduced by extending the height of the device above the board, thus keeping the resistor elements hot spot safely off the pc board and providing for increased air circulation under it, which in turn provides increased heat dissipation and cooler operation. the oar devices with increased height improve cooling effciency, and because many power supply designs are already tightly-packed at the pc board level, the additional height does not create any profle issues. the oar series resistors feature a reduced pitch, or spacing between the leads on the circuit board with a corresponding increase in the board mounted profle. the oar series resistors are power rated for 1w, 2w, 3w, or 5w at 85c, with resistance values from 0.05 to 0.005, with tolerances down to 1%. they feature tcrs as low as 50ppm/c and inductance values in the single-digit nanohenry range (10 nh max.). operating temperature range is -40c to +125c. the fameproof oar resistors are constructed of a wire resistive element with welded copper leads to prevent solder wicking, which can change the devices resistance value in the circuit by as much as 30%. the oar series is available in bulk packaging and is rohs compliant and lead free. for non-standard technical requirements and special applications,please contact us with your specifc needs. oar open air current sense resistors tokens tight pitch version of its open air metal element current sense resistor (oar) need less pcb space. open air current sense resistor features - high stability open-air style. - precision alloys resistive element. - lead (pb)-free and rohs compliant. - standard tolerance 1%, 2%, 5%. - low inductance. solderable copper leads (60/40). - radial leads, low resistance value 0.05 ~ 0.005. applications - cpu drive control. - power tool motor controls. - automotive, feedback system. - inverter and switching power supplies. - power supply shunt, current detective. - residual battery power detection, and current sensing. http://www.token.com.tw/ rfq token.com.tw t oke n version 2010
02 of 03 dimensions (unit: mm) specifcation oar open air current sense resistors version 2010 wwswrnhfrpw rfq token.com.tw t oke n b c a e f on lo wer ranges stand-off ma y be eliminated no te : contact f actor y f o r : 1. va ri ations of ?a? dimension. 2. diff erent lead diameter . te st po int (k elvin connection) type dimensions (unit: mm) ( ) oar-1 10 10 3.5 1.6 1.0 oar-2 15 15 3.5 1.6 1.0 oar-3 20 20 3.5 1.6 1.0 oar-5 20 20 3.5 1.6 1.0 type power rating @ 85c (w) resistance range p rohudfh hpshudwuhrhiflhw 5ssp inductance (nh) oar-1 1 5a5 10 max. oar-2 2 5a5 oar-3 3 5a5 oar-5 5 5a5 characteristic specifcation test items test method 6shflfdwlr load life 1000 hours @ 25c 55 moisture test no load for 1000 hours 55 temperature cycling -40c to +125c for 1000 cycles 55 operating temperature -40c to +125c
03 of 03 how to order ? ? 1 ? ? r01 j oar ? part number: oar ? rated power ? 5hvlvwdfhdoh ? rohudfh code rated power 1 1w 2 2w 3 3w 5 5w code 5hvlvwdfhdoh r005 r01 r05 oar open air current sense resistors version 2010 wwswrnhfrpw rfq token.com.tw t oe n back to 1st page - open-air current sensing resistors (oar) ? p code 5hvlvwdfhdoh f g j ? package-code code 5hvlvwdfhdoh p bulk
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