Low-ohmic chip resistors designed for current detection


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Designed for current detection in automotive systems, motors, and other power applications, LTR18 Series high-power wide-terminal low-ohmic chip resistors from ROHM offer 1W of rated power in the 3216 size (3.2x1.6mm, t=0.58mm) - up to 4 times greater than conventional products. Typically, resistors used for current detection in automotive, power supply, and motor circuits require low resistance, low TCR (Temperature Coefficient of Resistance), and high rated power. What's more, the growing interest in electronic products with ever increasing functionality will require even higher currents, heightening demand for products that support higher power in a compact form factor, particularly 1W in the 3216 size. In response, an original heat dissipation design was used to provide 4x the power rating vs. conventional products in the 3216 size, along with improved materials and a revamped resistor element structure for superior TCR characteristics even at low resistances. And the novel wide terminal configuration minimizes mechanical stress at the joints and improves joint reliability against temperature fluctuations. In addition, higher power handling capability and improved temperature characteristics make them ideal for sets with stringent temperature compensation requirements, such as automotive applications, while reducing design load significantly. ROHM