Chip Resistors Deliver Industry-Leading TCR Characteristics


Contributes to improved reliability in current detection applications

Kyoto and Santa Clara, Calif. –  ROHM announced the availability of a new lineup of high power wide terminal thick-film chip resistors (10-910mΩ), LTR50 series, ideal for current detection in a variety of applications, including inverters, AC, and energy-efficient appliances.

A thorough review of the resistive material allowed ROHM to improve rated power to 2W in the compact 2550 size (2.5x5.0mm, t=0.55mm) -- 4x higher than conventional short-terminal types – contributing to improved energy savings and greater miniaturization in high power applications. The new family is available in 48 values. In addition, optimization of the element structure makes it possible to achieve best-in-class TCR (temperature coefficient of resistance) characteristics among wide terminal thick-film chip resistors. The result is minimal resistance fluctuation due to temperature changes, enabling high accuracy current detection.

Key Features

1. Superior temperature coefficient of resistance (TCR) ensures high accuracy current detection
Generally, TCR increases as the resistance decreases, but optimizing the resistive element structure allowed ROHM to achieve class-leading TCR characteristics. For example, in the case of 100mΩ, the LTR50 series delivers a TCR of ±100ppm/°C, ensuring stable resistance.

2. 4x higher rated power than conventional products contributes to greater space savings
A thorough review of the resistive material made it possible to improve rated power to 2W in the compact 2550 size (2.5x5.0mm, t=0.55mm) -- 4x higher ROHM’s conventional MCR50 low-ohmic series (0.5W). This allows customers to reduce set size by using smaller resistors.

ROHM Semiconductor