The Siemens SIRIUS 3RT1034-1AL20 is a 3-pole power contactor from the SIRIUS 3RT1 series, size S2 frame. It delivers a rated operational current of 32 A at 400 V AC-3 (15 kW motor power) and 18 A at 690 V. The coil operates at 240 V AC 50/60 Hz with an inrush power of approximately 120 VA and holding power of 12 VA. It features 1 NO built-in auxiliary contact with screw terminals and supports DIN rail or screw mounting. Mechanical endurance reaches 15 million cycles, while electrical endurance is approximately 10 million switching cycles at rated current. Pick-up time is 20–40 ms and drop-out time is 70–120 ms. Typical applications include motor starting and control for conveyors, pumps, fans, compressors, HVAC systems, machine tools, and general industrial automation where reliable switching of 3-phase motors up to 15 kW is required. Dimensions are approximately 115 × 55 × 115 mm, weight 0.80 kg. IP20 finger-safe protection and compliance with IEC 60947-4-1, EN 60947-4-1, UL 508, and CSA C22.2 No. 14 standards.
FAQ
Q: What is the coil voltage of the 3RT1034-1AL20?
A: 240 V AC, 50/60 Hz. The "AL20" in the part number indicates a 200–277 V AC 50/60 Hz coil range.
Q: What is the maximum motor power this contactor can switch?
A: 15 kW (20 HP) at 400 V AC-3, and up to 18.5 kW at 500 V and 690 V AC-3.
Q: What size frame is the 3RT1034-1AL20?
A: Size S2, with approximate dimensions of 115 × 55 × 115 mm and a weight of 0.80 kg.
Q: How many auxiliary contacts does this model include?
A: 1 normally open (NO) auxiliary contact built-in. Additional auxiliary blocks (3RH19 side-mounting) can be added.
Q: What is the mechanical vs electrical lifespan?
A: Mechanical endurance is 15 million cycles. Electrical endurance at 32 A AC-3 is approximately 10 million switching cycles; at maximum rating it drops to approximately 1.3 million cycles.
Q: What overload relay should I pair with this contactor?
A: Siemens 3RU11 thermal overload relays are the direct match. For electronic protection, the 3RB series is also compatible.
Q: Can this contactor be DIN rail mounted?
A: Yes, it supports both standard 35 mm DIN rail mounting and direct screw panel mounting.
Q: What international certifications does this contactor hold?
A: IEC 60947-4-1, EN 60947-4-1, UL 508, and CSA C22.2 No. 14.
