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Siemens 3RT2015-1FB42 Contactor with Integrated Diode, 1 NC

Siemens 7A power contactor, 24V DC coil, integrated diode, 1 NC aux.

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ManufacturerSiemens

Part number3RT2015-1FB42

Type Power Contactor

Series SIRIUS 3RT2

Poles 3

Rated Operational Current AC-3e/AC-3 7 A

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Integrated suppression diode AC-3e/AC-3 rating 3-pole 24V DC coil 1 NC auxiliary contact Size S00

Product description

The Siemens 3RT2015-1FB42 is a 3-pole power contactor for AC-3e/AC-3 duty, rated at 7A and 3kW (400V). It features a 24V DC coil with an integrated suppression diode for surge protection and includes one normally closed (NC) auxiliary contact. This size S00 contactor utilizes screw terminals.

This contactor is designed for control systems needing both coil surge protection and a normally closed auxiliary contact for signaling or interlock functions. Its integrated diode simplifies wiring by eliminating the need for an external suppressor, making it suitable for PLC-controlled applications.

Stanlo Automation, a veteran-owned company, offers the Siemens 3RT2015-1FB42. We are committed to supplying surplus industrial automation parts, ensuring you receive components that enhance the reliability and safety of your control systems.

Technical specifications

Type	Power Contactor
Series	SIRIUS 3RT2
Poles	3
Rated Operational Current AC-3e/AC-3	7 A
Rated Operational Power AC-3e/AC-3	3 kW @ 400 V
Coil Voltage	24 V DC
Auxiliary Contacts	1 NC
Terminal Type	Screw Terminal
Size	S00
Integrated Diode	Yes

Common applications

PLC controlled systems

Motor control

Automation panels

Interlocking circuits

Signaling

Industrial machinery

Compatible systems

Ideal for use with PLCs and other control systems requiring DC coil surge protection and a normally closed auxiliary contact for interlocking or signaling purposes.

Also known as

Siemens 3RT20151FB42 SIRIUS 3RT2 NC Diode Contactor 7A Surge Protected NC Contactor 24V DC Contactor with Diode NC

Replaces / compatible with

This contactor replaces Siemens SIRIUS 3RT2 series contactors where both integrated coil surge protection and a normally closed auxiliary contact are required for control logic or safety interlocks. It offers a streamlined solution for PLC integration.

Technical note

Expert tip

The 3RT2015-1FB42's integrated diode provides effective transient suppression, crucial for maintaining signal integrity and protecting sensitive control devices in automated systems.

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Frequently asked questions

How does the integrated diode in the Siemens 3RT2015-1FB42 benefit PLC applications?

The integrated diode in the Siemens 3RT2015-1FB42 protects the PLC from damaging voltage spikes generated by the contactor's DC coil when it de-energizes. This enhances system reliability and reduces the risk of PLC damage, simplifying installation.