IRC Increases Resistance Range, Voltage Rating of High Power Resistors

Oct. 6, 2008
Date Announced: 06 Oct 2008 Surface mount resistor thinner, smaller than comparable molded 3Wwirewound devices...CORPUS CHRISTI, TX (October 6, 2008) --Providing design engineerswith a 3W-rated resistive component that requires minimal PC boardspace, TT electronics IRC has extended the resistance range andvoltage rating of its highest power dissipation chip resistor. The SC-3 Series resistor, a 3-watt device in a 1-watt (1225) chip size, now features a resistance range from 1ohm up to 100Kohms, and amaximum voltage rating increase from 50V to 100V."The terminations on the long sides of the resistor provide maximumheat transfer while also minimizing stress due to TCE mismatch betweenthe device and the PC board," said Gary Bleasdell, thick film businessunit director for IRC. "As a result of the enhanced design, we were not only able to extend the specifications, but this 3W resistor is much smaller and thinner than comparable molded 3W wirewound resistors."Typical applications for the SC-3 Series resistor include inrush current limiting in power supplies, current setting resistors in constant voltage LED circuits, and anywhere extremely low profileresistors are needed.The SC-3 Series 1225 resistors feature a resistance range of 1ohmto 100Kohms, with power dissipation of 3W @ 70°C. Absolute tolerancesare to ±1% with TCRs of ±100ppm/°C. Maximum voltage rating is 100Vand operating temperature ranges from -55C to +150°C. StandardSn/Pb terminations are available along with matte tin (Pb-free)terminations. IRC will also produce devices outside thesespecifications to meet customer requirements.Typical pricing for the SC-3 Series resistors is approximately $0.30each in minimum order quantities of 10,000 pieces. Lead time is fromstock to 7 weeks.For datasheets or more information on IRC's SC-3 Series highpower dissipation resistors, please access the Web site at Foradditional information, please contact the TT electronics IRC Sales& Marketing Department at 361-992-7900; via mail at 4222 S. StaplesSt., Corpus Christi, TX 78411; or e-mail at [email protected] Inc. is a leading international manufacturer of advanced film,metal glaze and wirewound resistive products with facilities in CorpusChristi, Texas, Boone, N.C., Smithfield, N.C., and Barbados. IRC ispart of TT electronics plc, a global electronics company manufacturinga broad range of advanced electronic components, assemblies andsensor modules for the automotive, telecommunications, computerand aerospace markets.

Gary Bleasdell, Thick Film Business Unit Director, IRC, Inc. 361-992-7900 [email protected]

E-mail:[email protected].