3RT2027-1AG20

The 3RT2027-1AG20 is a Siemens SIRIUS S0 size three-pole power contactor with a 110V AC (50/60Hz) control coil, 1NO+1NC auxiliary contacts, AC-3 rated 32A/15kW, screw terminals, 690V insulation class, and high versatility.

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Siemens 3RT2027-1AG20 Power Contactor, 110V Coil, 32A

Product Positioning

The 3RT2027-1AG20 is a Siemens SIRIUS 3RT2 series S0 size three-pole power contactor. The 110V AC (50/60Hz) control coil is a common low-voltage control circuit specification, suitable for use with the 110V output of the secondary side of the control transformer. The main circuit AC-3 is rated at 32A/15kW (400V). The 1NO+1NC auxiliary contacts can be used for action feedback or interlock protection. The holding power is only about 8.5~10.5VA, with low energy consumption and sensitive operation, and is suitable for various three-phase motor starting control panels.

Core Product Advantages and Features

110V AC control coil

Universal for both 50/60Hz frequencies, with a holding power of approximately 8.5~10.5VA, suitable for use with a 110V control transformer.

1NO+1NC auxiliary contact

The AC-15 is rated at 10A (230V)/3A (400V) and can directly drive indicator lights or interlocking circuits.

AC-3 32A/15kW rated

It maintains a switching capacity of 32A/15kW under 400V/500V loads, and still provides 21A/18.5kW under 690V loads.

High reliability design

It has a mechanical life of 10 million cycles, a 690V insulation class, and multiple international certifications including UL and CSA.

project	Specification
Model (MLFB)	3RT2027-1AG20
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	110V AC, 50/60Hz
auxiliary contacts	1 NO + 1 NC (AC-15: 10A@230V/3A@400V)
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 certification, RoHS compliant.

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