3RT2017-1HB42

The 24V DC coil has a closing and holding power consumption of 2.8W, an operating range of 0.7-1.25 times the rated voltage, a net weight of approximately 283g, and mirrored contacts conforming to IEC 60947-4-1, making it suitable for 1NC selection in safety interlocking circuits.

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Siemens 3RT2017-1HB42 Safety Contactor 24VDC 2.8W 1NC

Product Positioning

The 3RT2017-1HB42 is a Siemens SIRIUS 3RT20 series S00 frame contactor with a main circuit rated at 12A/5.5kW (400V) AC-3. The 24V DC coil operating range is 0.7 to 1.25 times the rated voltage. The official datasheet indicates a closing and holding power of 2.8W each, and the net weight is approximately 283 grams. This model features mirrored contact characteristics conforming to IEC 60947-4-1 and is indicated for safety-related circuit breaking applications (such as IEC 61508-2 Type A components). It has one set of auxiliary normally closed contacts, suitable for control circuits requiring reliable circuit breaking confirmation, such as emergency stops and safety door interlocks.

Core Product Advantages and Features

Complies with safety circuit breaking specifications

The mirror contact characteristics comply with IEC 60947-4-1 and are marked as IEC 61508-2 Type A components, suitable for safety-related circuit designs.

Low power coil

The closing and holding power is 2.8W, and the heat generation and power consumption are lower than those of traditional coils under long-term power-on.

1 set of normally closed auxiliary contacts

It can be used for power failure feedback, emergency stop circuit confirmation, or safety interlock signal transmission.

Actual service life data

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

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	0.7–1.25 × rated voltage
Coil power consumption (closed/held)	2.8W / 2.8W
Auxiliary contacts	Group 1 normally closed (1NC)
Terminal type	Screw terminals, compatible with 0.5–4mm² wires.
net weight	Approximately 283 g
Main circuit insulation voltage	690V
Electrical life (AC-4)	Approximately 200,000 cycles (400V/4.1A)
Protection level	IP20 (Front)
Safety-related certifications	The mirrored contacts conform to IEC 60947-4-1; IEC 61508-2 Type A.

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3RT2017-1HB41

AC-3 12A/5.5kW/400V, 24V DC coil operating range 0.7-1.25 times rated voltage, net weight approx. 294g, insulation voltage 690V, IP20 protection, built-in auxiliary normally open contact, suitable for general starting circuits.

3RT2017-1FB42

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