Siemens 3UA5800-2P Relay

Siemens 3UA5800-2P Relay is a thermal overload relay designed to protect motors in Siemens motor-control circuits when paired with compatible contactors such as 3TF46, 3TF47, 3TF48, or 3TB48. It provides an adjustable trip range of 50–63 A, enabling precise protection for a range of motor sizes and operating conditions. The unit includes one normally open and one normally closed auxiliary contact (1NO 1NC) for signaling and interlock functions, and it offers both automatic and manual reset. Mounting is panel-based with a 7-screw clamp terminal setup, and the enclosure rating is open, matching common installation environments in control cabinets. The 2P designation indicates a two-pole overload function integral to the protection scheme, making it a targeted replacement part within Siemens’ 3UA-series protection lineup. Typical applications include safeguarding industrial motors in conveyors, pumps, and processing equipment where Siemens protection components are specified, ensuring coordinated shutoff with the associated contactors and control circuitry. This relay serves as a dedicated overload protection accessory within Siemens’ motor-control ecosystem, delivering reliable current-based tripping within its 50–63 A range while providing basic signaling through its auxiliary contact.