3RT2027-1AM20

The 3RT2027-1AM20 is a Siemens SIRIUS S0 size three-pole power contactor, equipped with a 208V AC control coil and 1NO+1NC auxiliary contacts. It has an AC-3 rated capacity of 32A/15kW, screw terminals, and a mechanical life of 10 million cycles. It is suitable for 208V system motor starting circuits.

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Siemens 3RT2027-1AM20 Power Contactor, 208V Coil, 32A

Product Positioning

The 3RT2027-1AM20 belongs to the Siemens SIRIUS 3RT2 series S0 size three-pole power contactor. The main circuit can withstand AC-3 32A/15kW load at 400V. The 208V AC control coil is a common specification in North American 208V systems. With 1NO+1NC auxiliary contacts, it can directly meet the signal feedback requirements of PLC or motor control circuits. The screw terminal design facilitates wiring and maintenance. It is suitable for direct starting and protection applications of three-phase motors such as conveyors, air compressors, and pumps.

Core Product Advantages and Features

208V AC dedicated control coil

Compatible with common 208V control circuits in North America, suitable for 50/60Hz, and can be directly used with 208V systems without the need for a transformer.

1NO+1NC auxiliary contact

The main contact action synchronously feeds back the circuit status, facilitating connection to PLC monitoring or interlocking protection circuits.

S0 size compact body

With a compact size of 45×85×97mm, it saves space when installed inside a distribution box and weighs approximately 0.423kg.

Highly durable design

With a mechanical life of 10 million operations, 690V insulation class and IP20 protection, it is stable and reliable during long-term operation.

project	Specification
Model (MLFB)	3RT2027-1AM20
Series/Size	SIRIUS 3RT2,S0
Extreme number	3 poles
AC-3 rated (400V)	32A / 15kW
AC-3 rated (690V)	21A / 18.5kW
Control coil voltage	208V 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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