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Siemens 3RT2027-1KB40 32A Power Contactor - PLC Suitable, 24V DC

Siemens 3RT2027-1KB40 32A Power Contactor for PLC outputs, 24V DC.

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ManufacturerSiemens

Part number3RT2027-1KB40

AC-3e/AC-3 Rating 32A

Power 15 kW / 400 V

Poles 3

Coil Voltage 24 V DC (0.7-1.25* Uc)

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AC-3e/AC-3 Rated 32A Current Rating 24V DC Coil PLC Output Compatible Integrated Varistor 1 NO + 1 NC Auxiliary Contacts

Product description

The Siemens 3RT2027-1KB40 is a 3-pole power contactor rated for AC-3e/AC-3 applications, handling 32A and 15kW at 400V. This S0-sized contactor is designed for 24V DC coil operation with a control voltage range of 0.7-1.25* Uc. It features a plugged-in varistor for surge suppression and comes with 1 NO + 1 NC auxiliary contacts. Screw terminals are used for connection, and importantly, no additional auxiliary switch can be added to this specific model, making it ideal for direct PLC output integration.

This contactor is specifically designed for applications where direct interfacing with Programmable Logic Controllers (PLCs) is required. Its features make it suitable for motor starting, control circuits, and switching loads in automated manufacturing, process control, and building management systems.

Stanlo Automation, your trusted veteran-owned source for surplus industrial automation parts, offers the Siemens 3RT2027-1KB40. Secure this specialized contactor at a competitive price and benefit from our efficient service.

Technical specifications

AC-3e/AC-3 Rating	32A
Power	15 kW / 400 V
Poles	3
Coil Voltage	24 V DC (0.7-1.25* Uc)
Auxiliary Contacts	1 NO + 1 NC
Terminals	Screw
Size	S0
PLC Suitable	Yes

Common applications

PLC controlled systems

Motor control

Automation panels

Machine building

Process control

Building automation

Compatible systems

Siemens S7 PLCs Allen-Bradley MicroLogix Other PLC systems with 24V DC outputs

Also known as

Siemens 3RT2027-1KB40 Contactor Siemens PLC Contactor 3RT20 S0 PLC Contactor

Replaces / compatible with

Designed for direct integration with PLC outputs, eliminating the need for intermediate relays in some applications.

Technical note

Expert tip

The 0.7-1.25* Uc coil voltage range on the 3RT2027-1KB40 provides flexibility for varying control supply conditions.

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Frequently asked questions

Can I add auxiliary contacts to the Siemens 3RT2027-1KB40?

No, the Siemens 3RT2027-1KB40 is designed without the possibility of adding auxiliary switches. This specific design is intended for direct interface with PLC outputs, simplifying control circuits.