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Siemens 3RT2025-1KB40 PLC Contactor — 17A 7.5kW 24V DC

Siemens 3RT2025-1KB40 3-pole PLC output suitable contactor.

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ManufacturerSiemens

Part number3RT2025-1KB40

Type Power Contactor

AC-3e/AC-3 Rating 17A, 7.5kW @ 400V

Poles 3

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

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AC-3e/AC-3 motor rating 3-pole configuration 1 NO + 1 NC auxiliary contacts 24V DC coil for PLC outputs Integrated varistor S0 frame size

Product description

The Siemens 3RT2025-1KB40 is a 3-pole power contactor for AC-3e/AC-3 duty, rated at 17 A and 7.5 kW at 400 V. This S0-sized contactor features a 24 V DC coil with a control voltage range of 0.7-1.25* Uc and includes a plugged-in varistor for surge suppression. It has 1 NO + 1 NC auxiliary contacts and screw terminals. Crucially, it is designed for PLC outputs and cannot have an auxiliary switch added.

This contactor is specifically engineered for direct interfacing with PLC outputs, providing reliable switching for industrial automation. The integrated varistor offers protection against voltage transients, and its design prevents additional auxiliary switches, simplifying its use in dedicated PLC control scenarios.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RT2025-1KB40. We provide reliable access to industrial automation components. Trust Stanlo for your essential surplus parts needs and ensure your automation systems run efficiently.

Technical specifications

Type	Power Contactor
AC-3e/AC-3 Rating	17A, 7.5kW @ 400V
Poles	3
Coil Voltage	24V DC (0.7-1.25* Uc)
Auxiliary Contacts	1 NO + 1 NC
Terminal Type	Screw
Size	S0

Common applications

PLC output switching

Industrial automation

Motor control

Control panels

Machine automation

Automation systems

Compatible systems

Siemens S7 PLCs Other PLCs with 24V DC outputs Automation control systems

Also known as

Siemens 3RT2025-1KB40 SIRIUS 3RT2025-1KB40 Siemens 17A PLC Contactor

Replaces / compatible with

Designed as a direct replacement or alternative for Siemens contactors used specifically with PLC outputs requiring 24V DC operation and integrated surge protection.

Technical note

Expert tip

The integrated varistor provides effective suppression of inductive voltage spikes when the 24V DC coil is switched off by the PLC, ensuring reliable operation.

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Frequently asked questions

Is the Siemens 3RT2025-1KB40 suitable for direct connection to PLC outputs?

Yes, the Siemens 3RT2025-1KB40 is specifically designed and suitable for direct connection to PLC outputs. It features a 24V DC coil and includes an integrated varistor for surge protection, common requirements for PLC interfacing.