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Siemens 3RT2017-1FB42 DC Power Contactor with Diode - 12A, 5.5kW, 24V DC

Siemens 3RT2017-1FB42 DC contactor with diode and 1 NC aux.

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ManufacturerSiemens

Part number3RT2017-1FB42

Type Power Contactor

AC-3e/AC-3 Rating 12A

Power Rating 5.5 kW @ 400 V

Poles 3

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AC-3e/AC-3 rated 5.5 kW power capacity 24V DC coil Integrated suppression diode 1 NC auxiliary contact Size S00

Product description

The Siemens 3RT2017-1FB42 is a 3-pole power contactor for AC-3e/AC-3 duty, rated at 12A and 5.5kW (400V). It features a 24V DC coil and includes an integrated suppression diode to mitigate voltage spikes from inductive loads. This model comes with one normally closed (NC) auxiliary contact and is housed in the compact S00 size frame with screw terminals.

This contactor is well-suited for DC control applications where protection against coil de-energization transients is crucial. The integrated diode simplifies wiring and ensures reliable operation in industrial automation, motor control, and building management systems.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RT2017-1FB42. We are dedicated to providing high-quality, tested surplus components at competitive prices, helping you maintain operational continuity. Trust Stanlo Automation for all your industrial automation part needs.

Technical specifications

Type	Power Contactor
AC-3e/AC-3 Rating	12A
Power Rating	5.5 kW @ 400 V
Poles	3
Coil Voltage	24 V DC
Auxiliary Contacts	1 NC
Feature	Integrated suppression diode
Terminal Type	Screw
Size	S00

Common applications

DC control systems

Motor control

Industrial automation

Machinery

Building automation

Applications requiring load signaling

Compatible systems

Siemens SIRIUS 3RT2 series Compatible with DC control circuits and Siemens accessories

Also known as

Siemens SIRIUS 3RT2017-1FB42 3RT20171FB42 Siemens 24V DC Contactor 1NC Diode

Replaces / compatible with

This Siemens contactor with an integrated diode offers a solution for DC control circuits needing transient suppression. It is part of the SIRIUS 3RT2 series and can replace similar DC contactors.

Technical note

Expert tip

The built-in diode provides effective protection for most inductive DC loads. Ensure its polarity is correctly observed if external wiring is involved.

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Frequently asked questions

What is the function of the integrated suppression diode on the Siemens 3RT2017-1FB42?

The integrated suppression diode on the Siemens 3RT2017-1FB42 protects the control circuitry from potentially damaging voltage spikes generated when the 24V DC coil is switched off. This feature enhances the reliability and lifespan of the control system.