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Siemens SIRIUS 3RT1026-1KB40 Contactor - 25A, 24V DC, Varistor

Siemens SIRIUS 3-pole power contactor with varistor protection.

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ManufacturerSiemens

Part number3RT1026-1KB40

Type Power Contactor

AC-3 Rating 25A

Power Rating 11 kW @ 400V

Poles 3

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AC-3 rated 25A 11 kW power at 400V 24V DC coil Integrated varistor for surge suppression 3-pole configuration Size S0 frame

Product description

The Siemens 3RT1026-1KB40 is a 3-pole power contactor from the SIRIUS series, rated for AC-3 duty at 25A and 11 kW at 400V. This model features a 24V DC coil and includes an integrated varistor for surge suppression, enhancing coil protection. It utilizes screw terminals for secure connections and is part of the S0 frame size.

This contactor is ideal for motor control and other industrial applications where protection against voltage spikes is beneficial for the control circuit. The inclusion of a varistor contributes to increased operational reliability and extended component life.

Stanlo Automation, a veteran-owned surplus parts distributor, offers this and other essential industrial automation components. Benefit from our competitive pricing, fast shipping, and expert support to keep your systems running efficiently.

Technical specifications

Type	Power Contactor
AC-3 Rating	25A
Power Rating	11 kW @ 400V
Poles	3
Coil Voltage	24V DC
Frame Size	S0
Terminal Type	Screw Terminal

Common applications

Motor Control

Industrial Automation

Control Panels

Applications with Voltage Fluctuation Risk

Compatible systems

Compatible with Siemens overload relays and other SIRIUS 3RT accessories.

Also known as

Siemens SIRIUS 3RT1026-1KB40 3RT10261KB40 Siemens 24V DC Contactor with Varistor

Replaces / compatible with

This is a phased-out product. The preferred successor is the SIRIUS 3RT2026-1KB40.

Technical note

Expert tip

The varistor offers protection but does not eliminate the need for proper grounding and system-wide surge protection measures.

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Frequently asked questions

What is the benefit of the varistor in the Siemens 3RT1026-1KB40?

The integrated varistor in the Siemens 3RT1026-1KB40 acts as a surge suppressor, protecting the coil from transient overvoltages that can occur during switching operations, thereby enhancing the contactor's lifespan and reliability.