ROHM Unveils the UCR10C Series of Sintered Metal Shunt Resistors
ROHM has developed the “UCR10C Series”, delivering the industry’s highest rated power for 2012-size shunt resistors (10mΩ to 100mΩ).
Shunt resistors are required to handle higher power for current sensing in both the automotive and industrial equipment markets. Additionally, specific requirements for high junction reliability in these markets has increased annually.
ROHM’s new products form a copper-based resistive element on an alumina substrate via sintering. By optimising the heat dissipation structure, it achieves rated powers of 1.0W and 1.25W – double those of equivalent-sized products including thick film types and metal plate types. This enables the replacement of products with wide terminal types or larger alternatives, facilitating miniaturisation and reducing the number of components required.
Furthermore, the use of a metal resistive element achieves a low TCR (0 to +60 ppm/°C). This minimises errors due to temperature changes, enabling high-precision current sensing. Moreover, it achieves the same level of durability as the metal plate types in temperature cycle testing (-55°C / +155°C, 1000 cycles). This ensures high bonding reliability even in applications with extreme temperature fluctuations, such as automotive use, enabling stable, long-term operation.
This series is fully lead-free. No lead materials are present, even in RoHS-exempted areas, thus reducing environmental impact.
