IRC Increases Resistance Range, Voltage Rating of High Power Resistors

Content Dam Leds En Ugc 2008 10 Irc Increases Resistance Range Voltage Rating Of High Power Resistors Leftcolumn Article Thumbnailimage File
16953 0 thumb Date Announced: 06 Oct 2008

Surface mount resistor thinner, smaller than comparable molded 3W
wirewound devices...

CORPUS CHRISTI, TX (October 6, 2008) --Providing design engineers
with a 3W-rated resistive component that requires minimal PC board
space, TT electronics IRC has extended the resistance range and
voltage 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 a
maximum voltage rating increase from 50V to 100V.

"The terminations on the long sides of the resistor provide maximum
heat transfer while also minimizing stress due to TCE mismatch between
the device and the PC board," said Gary Bleasdell, thick film business
unit 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 profile
resistors are needed.

The SC-3 Series 1225 resistors feature a resistance range of 1ohm
to 100Kohms, with power dissipation of 3W @ 70°C. Absolute tolerances
are to ±1% with TCRs of ±100ppm/°C. Maximum voltage rating is 100V
and operating temperature ranges from -55C to +150°C. Standard
Sn/Pb terminations are available along with matte tin (Pb-free)
terminations. IRC will also produce devices outside these
specifications to meet customer requirements.

Typical pricing for the SC-3 Series resistors is approximately $0.30
each in minimum order quantities of 10,000 pieces. Lead time is from
stock to 7 weeks.

For datasheets or more information on IRC's SC-3 Series high
power dissipation resistors, please access the Web site at For
additional information, please contact the TT electronics IRC Sales
& Marketing Department at 361-992-7900; via mail at 4222 S. Staples
St., Corpus Christi, TX 78411; or e-mail at

IRC Inc. is a leading international manufacturer of advanced film,
metal glaze and wirewound resistive products with facilities in Corpus
Christi, Texas, Boone, N.C., Smithfield, N.C., and Barbados. IRC is
part of TT electronics plc, a global electronics company manufacturing
a broad range of advanced electronic components, assemblies and
sensor modules for the automotive, telecommunications, computer
and aerospace markets.

Gary Bleasdell, Thick Film Business Unit Director, IRC, Inc. 361-992-7900


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