In recent years, the need for high-efficiency operation from an energy conservation perspective has become increasingly apparent. This applies not only to battery-powered applications such as mobile devices and electric vehicles, but also to consumer and industrial equipment powered by mains electricity. To achieve high efficiency, it is crucial to accurately detect parameters such as current and voltage to ensure optimal device operation. This requires shunt resistors that combine high accuracy with highly reliable current sensing. Simultaneously, manufacturers of applications using higher plate densities are demanding even smaller shunt resistors. To meet these needs, the new LTR10L series offers the industry's highest power rating and best-in-class resistance temperature coefficient (TCR) in a compact 0508 (0.5 in × 0.8 in) / 1220 (1.25 mm × 2.0 mm) size that contributes to both high reliability and further miniaturization.
Improvements to the resistive element material and the application of a terminal temperature reduction method have enabled the LTR10L series to offer an industry-leading 1W power rating in the 0508 size, which is 88% smaller than existing products. Furthermore, a high-precision resistance tolerance of ±0.5% has been achieved, along with best-in-class TCR and anti-sulfurization characteristics. These features make them ideal for applications exposed to harsh conditions, such as telecommunications base stations requiring high durability and automotive LED headlights demanding high-precision current sensing and long-term reliability.
On the other hand, the MCR10L and MCR18L series of general-purpose shunt resistors utilize an improved element and material structure to increase the power rating to 0.5 W and 0.7 W, respectively, compared to the power rating of the conventional MCR series (0.25 W). This higher power rating allows for the same performance in a smaller size, contributing to product miniaturization.
In the future, ROHM will continue to expand its range of resistors (its core products), which will allow for improved miniaturization and reliability, while striving to ensure a stable long-term supply.
Product range
LTR10L range
MCR10L / MCR18L Range
Application Examples
The new products are ideal for a wide range of circuits requiring current sensing for motors, batteries, and LCD displays in the automotive, industrial equipment, and consumer device sectors
Online Sales Information
Availability: Immediate (in mass production)
Online Distributors: Digi-Key, Mouser, and Farnell
These three series are offered in the following resistance values.
(Fig. 6 – All units in mΩ)
Additional resistance values will be added as needed.
Support page.
Product pages can now be searched by series or resistance values, and samples are available for purchase: https://www.rohm.com/products/resistors
*ROHM Study of December 8, 2022
