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Siemens 3RT2015-1KB42 7A 3-Pole Contactor, 24V DC, 1 NC

Siemens 3RT2015-1KB42 7A 3-pole contactor, 24V DC, 1 NC aux.

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ManufacturerSiemens

Part number3RT2015-1KB42

Type Power Contactor

Series 3RT20

AC-3e/AC-3 Rating 7A, 3kW/400V

Poles 3

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AC-3e/AC-3 rated Integrated suppressor diode 1 NC auxiliary contact PLC output compatible Size S00 Screw terminals

Product description

The Siemens 3RT2015-1KB42 is a 3-pole power contactor suitable for AC-3e/AC-3 applications, rated for 7A and 3kW at 400V. It features a 24V DC coil with a control voltage range of 0.7-1.25* Uc and includes an integrated suppressor diode. This model is equipped with one normally closed (NC) auxiliary contact, housed in a size S00 frame with screw terminals, and is designed for PLC outputs.

This contactor is commonly used in motor control circuits, automation systems, and control panels where reliable switching and protection against voltage spikes are necessary. Its specific configuration with an NC auxiliary contact is beneficial for safety interlocks and signaling.

Stanlo Automation, a veteran-owned business specializing in industrial automation surplus, offers the Siemens 3RT2015-1KB42. We are committed to providing high-quality components and exceptional service to ensure your operational continuity.

Technical specifications

Type	Power Contactor
Series	3RT20
AC-3e/AC-3 Rating	7A, 3kW/400V
Poles	3
Coil Voltage	24V DC (0.7-1.25* Uc)
Auxiliary Contacts	1 NC
Terminals	Screw
Size	S00
Features	Integrated Suppressor Diode
Suitability	PLC Outputs

Common applications

Motor control

Automation systems

Control panels

Safety interlocks

Industrial machinery

Switchgear

Compatible systems

PLC systems Automation controllers Motor starter assemblies Control panels

Also known as

Siemens 3RT2015-1KB42 Siemens S00 contactor 7A 24V DC contactor

Replaces / compatible with

This contactor can serve as a direct replacement for Siemens S00-sized contactors requiring a 24V DC coil, integrated suppressor diode, and a single NC auxiliary contact for PLC interface.

Technical note

Expert tip

The 3RT2015-1KB42 is designed for applications where an NC auxiliary contact is critical for maintaining a safe state or signaling a fault condition, alongside coil protection.

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Frequently asked questions

What is the purpose of the suppressor diode in the Siemens 3RT2015-1KB42?

The suppressor diode integrated into the Siemens 3RT2015-1KB42 coil circuit helps to absorb transient voltage spikes that occur when the coil is switched off. This protects sensitive electronic controls connected to the contactor's circuit.