3RT2027-1AL20

The 3RT2027-1AL20 is a Siemens SIRIUS S0 size three-pole power contactor with a 230V AC coil, 1NO+1NC auxiliary contacts, AC-3 rated 32A/15kW, screw terminals, IP20 protection, a weight of approximately 0.423kg, a mechanical life of 10 million cycles, and high versatility.

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Siemens 3RT2027-1AL20 Power Contactor 230V Coil 32A

Product Positioning

The 3RT2027-1AL20 is one of the most frequently asked S0-size three-pole power contactors in the Siemens SIRIUS 3RT2 series. The 230V AC control coil covers the control circuit voltages common in Taiwan and most of the Asia-Pacific region. The main circuit AC-3 rated capacity is up to 32A/15kW (400V), and it still maintains a switching capacity of 21A/18.5kW at 690V. The 1NO+1NC auxiliary contacts facilitate feedback of the contactor's operating status. It is suitable for direct starting control of various three-phase induction motors such as blowers, conveyor belts, and water pumps.

Core Product Advantages and Features

230V AC control coil

Compliant with the common 230V control circuit voltage in Taiwan and most countries, 50/60Hz dual-frequency universal without frequency selection.

Wide switching capability

The AC-3 can achieve 32A/15kW at 400V/500V, and still has 21A/18.5kW switching capacity at 690V.

1NO+1NC auxiliary contact

Real-time feedback of the main contact status facilitates connection to monitoring, interlocking, or alarm circuits.

High mechanical and electrical life

Mechanical life of 10 million cycles, AC-4 electrical life of approximately 200,000 cycles, and high long-term operational stability.

project	Specification
Model (MLFB)	3RT2027-1AL20
Series/Size	SIRIUS 3RT2,S0
Extreme number	3 poles
AC-3 rated (400V/500V)	32A / 15kW
AC-3 rated (690V)	21A / 18.5kW
Control coil voltage	230V AC, 50/60Hz
Auxiliary contacts	1 NO + 1 NC
Terminal type	Screw terminals (main circuit 1–10mm², auxiliary circuit 0.5–2.5mm²)
External dimensions (width × height × depth)	45 × 85 × 97 mm
weight	Approximately 0.423 kg
Mechanical life	10 million times
Electrical life (AC-4, 400V, 12A)	Approximately 200,000 times
Rated insulation voltage	690V (Pollution Level 3)
IP protection rating (positive)	IP20
Certification	UL, CSA, CCC, KC, EAC, and also ship classification certifications, RoHS compliant.

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