Siemens 3UA7011-1F Overload Relay

Siemens 3UA7011-1F is a solid-state overload relay designed to protect motors in starter circuits by monitoring load current and triggering a fault if the current exceeds the preset limit. It provides a setting range of 3.2 A to 5 A, enabling precise tuning to match the motor’s full-load current. The device is rated for up to 600 VAC mains, with some catalog references noting a 660 V rating in certain listings. It includes a built-in auxiliary contact configuration of 1 normally open plus 1 normally closed (1NO+1NC) for signaling to control circuits or PLCs, and a push-to-stop/push-to-reset mechanism for manual reset after a trip. This relay is intended for use with Siemens motor control assemblies, functioning as part of the protection and signaling layer alongside contactors in motor starter applications. The 3UA7011-1F belongs to Siemens’ 3UA family of overload relays, offering compact protection suitable for industrial equipment such as conveyors, pumps, and fans where reliable overload protection and straightforward signaling are required. When selecting this relay, verify that the motor’s full-load current falls within the 3.2–5 A range and that the relay’s auxiliary contact configuration is compatible with the control scheme and interlocking requirements of your drive or starter system.