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Siemens SIRIUS 3RT2026-1KB40 Power Contactor — 25A, 24V DC

Siemens 3RT2026-1KB40 SIRIUS 3-pole power contactor.

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ManufacturerSiemens

Part numberRT2026-1KB40

Rated Operational Current (AC-3e/AC-3) 25A

Rated Power (AC-3e/AC-3) 11kW at 400V

Poles 3

Control Supply Voltage 24V DC

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3-pole power contactor 25A rating 24V DC coil Integrated varistor for surge protection 1NO + 1NC auxiliary contacts SIRIUS 3RT2 series PLC compatible

Product description

The Siemens SIRIUS 3RT2026-1KB40 is a 3-pole power contactor designed for reliable switching of motors and industrial loads up to 11 kW at 400V AC-3e/AC-3. It features a robust SIRIUS 3RT2 series construction and a low-consumption 24 V DC control voltage coil, making it ideal for direct integration with PLC outputs. The integrated varistor provides essential protection against voltage spikes, ensuring longevity and consistent performance.

This contactor is widely applied in motor control centers, automation panels, and general industrial machinery. Its 25A rating and compatibility with modern control systems make it a versatile component for a wide range of applications requiring safe and efficient power switching.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RT2026-1KB40. We provide reliable access to quality industrial components, ensuring you receive dependable parts for your automation projects with efficient service.

Technical specifications

Rated Operational Current (AC-3e/AC-3)	25A
Rated Power (AC-3e/AC-3)	11kW at 400V
Poles	3
Control Supply Voltage	24V DC
Auxiliary Contacts	1 NO + 1 NC
Coil Protection	Varistor
Frame Size	S0
Terminal Type	Screw

Common applications

Motor Control

Automation Panels

Industrial Machinery

HVAC Systems

Pump Control

Conveyor Systems

Compatible systems

Compatible with Siemens SIRIUS overload relays and motor starter accessories. Suitable for direct control by PLCs with 24V DC outputs.

Also known as

3RT2026-1KB40 Siemens Contactor 25A SIRIUS 3RT2 Contactor

Replaces / compatible with

Replaces older Siemens 3RT1026-1KB40 contactors.

Technical note

Expert tip

The integrated varistor in the 3RT2026-1KB40 provides surge suppression for the coil, eliminating the need for external suppressor modules in many applications.

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Frequently asked questions

What is the control voltage for the Siemens 3RT2026-1KB40 contactor?

The Siemens 3RT2026-1KB40 contactor features a 24V DC control coil voltage. This low voltage makes it highly suitable for direct connection to the outputs of programmable logic controllers (PLCs).