3RT2017-1FB42

The 24V DC standard coil has a closing and holding power consumption of 4W, an operating range of 0.8-1.1 times the rated voltage, AC-3 12A/5.5kW/400V, and a built-in auxiliary normally closed contact; AC-15 rated 230V: 10A/400V: 3A.

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Siemens 3RT2017-1FB42 Standard Coil Contactor 24VDC 4W 1NC

Product Positioning

The 3RT2017-1FB42 is a Siemens SIRIUS 3RT20 series S00 frame contactor. Its main circuit is rated AC-3 at 12A/5.5kW (400V). The coil is a standard 24V DC design, with an operating range of 0.8 to 1.1 times the rated voltage. The official datasheet indicates a closing and holding power of 4W, which is slightly higher than the aforementioned electronic or PLC-compatible coils. However, its simple circuit structure and wide compatibility make it a commonly used specification in the market for many years. It has one set of auxiliary normally closed contacts, rated AC-15 at 230V: 10A, 400V: 3A, and 690V: 1A. Both the main circuit and control circuit use screw terminals, making it suitable for start/stop circuits of general standard control power supplies (non-PLC direct drive).

Core Product Advantages and Features

Standard DC coil

With an operating range of 0.8 to 1.1 times the rated voltage, it features a traditional stable coil design with wide compatibility and readily available components.

Complete AC-15 rating data

The auxiliary contact AC-15 is rated at 10A under 230V, 3A under 400V, and 1A under 690V, suitable for control circuits to directly switch small loads.

Actual service life

Mechanical life of 30 million cycles, AC-4 electrical life of approximately 200,000 cycles (400V/4.1A, 690V/3.3A).

1 set of normally closed auxiliary contacts

It can be used in power failure feedback or interlocking circuits, with IP20 protection and 6kV impulse voltage withstand capability.

project	Specification
Product Type	SIRIUS 3RT20 Series Electric Contactors
Rated current (AC-3)	12 A
Rated power	5.5 kW / 400V AC
Extreme number	3P (3 poles)
Frame size	S00 (45mm wide × 58mm high × 73mm deep)
coil voltage	24V DC
Coil operating range	0.8–1.1 × rated voltage (standard type)
Coil power consumption (closed/held)	4W / 4W
auxiliary contacts	Group 1 normally closed (1NC)
Auxiliary contact AC-15 rated	230V: 10A; 400V: 3A; 690V: 1A
Terminal type	Screw terminals, compatible with 0.5–4mm² wires.
Main circuit insulation voltage	690V
Impact and pressure resistant	6kV
Electrical life (AC-4)	Approximately 200,000 cycles (400V/4.1A; 690V/3.3A)
Protection level	IP20 (Front)

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3RT2017-1FB41

The S00 miniature electromagnetic contactor features a built-in diode design in its 24V DC coil, which reduces voltage surges during power outages. The AC-3 rated capacity is 12A/5.5kW (400V), and it has a 3-pole structure with one set of normally open auxiliary contacts.

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