January 30, 2026 /SemiMedia/ — Allegro MicroSystems said it has launched the ACS37200, a galvanically isolated current sensor aimed at improving efficiency and power density in high-current applications across electric vehicles, industrial automation, AI data centers and renewable energy systems.

As power electronics move toward higher current levels and more compact designs, conventional shunt resistors have become a limiting factor due to heat generation and energy loss. Allegro said the ACS37200 addresses this issue by lowering conductor resistance to 50 micro-ohms, sharply reducing wasted power during current measurement.

In a typical 100-amp system, a standard 0.5 milliohm shunt resistor can dissipate around five watts as heat. According to the company, the new sensor cuts that figure to roughly 0.5 watts, allowing more energy to be delivered to the load while easing thermal management requirements.

The lower losses also support higher power density. The ACS37200 is housed in a compact surface-mount PSOF package with a footprint of about 100 square millimeters, making it significantly smaller than both discrete shunt-based designs and earlier integrated sensing solutions. Allegro said the reduction in heat output enables designers to remove bulky heatsinks and external isolation components, freeing up board space in dense power systems.

Beyond size and efficiency, the device integrates current sensing and basic isolation in a single, factory-calibrated component certified to UL 62368-1. This integration can reduce component count, simplify supply chains and improve system safety in high-voltage environments.

Allegro said the ACS37200 is now available for sampling, targeting next-generation power platforms in e-mobility, industrial equipment and clean energy infrastructure. For more information, please visit www.allegromicro.com/acs37200.