Schneider Electric SB4.85 Thermal Overload Relay is a thermal protection device designed to interrupt a circuit when an overheating condition is detected, helping prevent damage to electrical components. The SB4.85 designation is also associated with Square D branding, reflecting its place in Schneider Electric’s thermal overload relay lineup. As a dedicated overload protection element, it monitors temperature rise within electrical control circuits and provides a protective action to maintain safe operation.
