Siemens 3RT1044-1A

Siemens 3RT1044-1A is a SIRIUS series three-pole power contactor, rated AC-3 65A / 30kW@400V with S3 frame size, designed for switching and controlling three-phase asynchronous motors in industrial control cabinets. It adopts modular DIN rail mounting structure and screw terminal connection, with robust silver alloy main contacts and high mechanical endurance, stable for frequent on-off operation in factory automation environments. The power contactor switches heavy motor load circuits under control signal command, the power contactor isolates main power from control circuit for equipment safety. Electrical engineers rely on the power contactor for conveyors, pumps, fans and packaging machine motor control. The power contactor supports quick assembly with auxiliary contacts, overload relays and surge suppressors.

Siemens 3RT1044-1A features compact cabinet layout and wide ambient temperature tolerance, with high mechanical and electrical service life. It can be matched with thermal overload relays to build complete motor protection circuit against overload and phase loss faults. The motor load switching connects or disconnects three-phase power supply to drive motors. Reliable motor load switching realizes remote start and stop of production equipment through PLC digital outputs. Operators can combine auxiliary contact modules to feed back working status for motor load switching to control systems. Arc suppression design ensures safe motor load switching and extends contact service life under repeated cyclic operation.

Siemens 3RT1044-1A is widely applied in water treatment, chemical auxiliary systems, logistics conveying and HVAC control panels. Every contactor undergoes contact resistance inspection, coil test and switching aging test before factory shipment. The motor control assembly forms complete motor starter sets with overload relays and circuit breakers. This contactor provides dependable motor control assembly performance for continuous industrial production. Simple spare contact replacement and modular accessory expansion preserve stable motor control assembly performance over long service cycles. Global automation customers select this model for durable, compact and cost-effective motor control assembly solutions.