Chip resistors make smart savings

ROHM Semiconductor has announced the development of low-ohmic chip resistors optimised for current detection applications in compact equipment such as smartphones and wearable devices.

The UCR006 series of ultra-compact (0.6×0.3mm / 0.2 x0.1in) thick-film chip resistors is offered in resistances down to 100mΩ, which help save energy.

The company says they are also the first 0603-size(mm) / 0201-size(in) resistors in the industry to ensure a temperature range of -55 to 155°C in the low-ohmic region. This high power handling capability in a smaller size makes them suitable replacements for larger 1005-size(mm) / 0402-size(in) resistors, contributing to further miniaturisation.

ROHM’s latest series uses new materials and a new structure to achieve low resistance (100mΩ) in a 0603-size(mm), thick-film design.

A laser trimming technology makes it possible to achieve a resistance tolerance of ±1% (F Class), which has been traditionally difficult to realise at low resistances.

These new products have adopted the reverse-mount design used in the existing series to minimize resistance variations during soldering and ensure a temperature coefficient of resistance between 0 and 300ppm/°C, which reduces resistance fluctuations due to temperature changes. This provides high accuracy current detection required by high-performance devices.

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