The HASS300S Open Loop Current Sensor is a DC current sensor designed to monitor currents up to 300 A using an openloop sensing approach. In listings, it is associated with the HASS400S family, and the HASS300S model specifies a DC current range of 300 A. This sensor is suited for straightforward current monitoring in power, control, and protection applications. Key benefits Simple, costeffective DC current monitoring up to 300 A with an openloop design. Output is a signal proportional to the measured current, enabling easy reading by controllers, DAQ systems, or protection circuits. Compact form factor and straightforward installation support quick integration into enclosures, control panels, or test benches. Robust construction intended for use in typical industrial environments, contributing to reliable longterm operation. Key attributes Functionality: Open loop DC current sensing with a 300 A range. Compatibility: Designed to integrate with standard measurement and control systems and interfaces used in power, motor, and protection applications. Size/Form Factor: Compact housing suitable for spaceconstrained installations. Material: Housing details are not specified in the listing; the product is presented as a durable sensor suitable for industrial use. Performance: Provides a DC current measurement signal appropriate for monitoring, control, and protection tasks; built to support realtime sensing in typical applications. Two to three use cases Battery management systems and DC power supplies: monitor DC bus current to protect components, regulate charging/discharging, and enable proper system control. DC motor drives and motor protection: monitor current to detect overloads, help with softstart strategies, and trigger protective actions. Renewable energy and DC microgrids: monitor current on DC feeders in solar or other DC energy systems to support safe and efficient operation. Notes The product is listed as HASS300S Open Loop Current Sensor with a DC 300 A specification, and is also referenced as HASS400S in related listings. This should be verified against the specific catalog or supplier documentation when ordering.