3RT2017-1SB41

The 24V DC electronic coil has a measured closing and holding power consumption of only 1.6W, an operating range of 0.85-1.85 times the rated voltage, and supports AC-3 12A/5.5kW/400V. It has a built-in set of auxiliary normally open contacts, making it suitable for circuits that maintain engagement for extended periods.

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Siemens 3RT2017-1SB41 Low-power electronic coil contactor 24VDC 1.6W 1NO

Product Positioning

The 3RT2017-1SB41 is a Siemens SIRIUS 3RT20 series S00 frame contactor with a main circuit rated at 12A/5.5kW (400V) AC-3. This model features a 24V DC electronic coil design. Official data indicates that both the closing and holding power are only 1.6W, and the operating range is 0.85 to 1.85 times the rated voltage. It consumes little power and generates little heat during prolonged engagement, offering energy-saving advantages for applications requiring continuous operation of machinery and constant contactor power. It includes one set of auxiliary normally open contacts for operational status feedback. Both the main circuit and control circuit utilize screw terminal designs.

Core Product Advantages and Features

Ultra-low coil power consumption

The closing and holding power is 1.6W, and the heat generation and power consumption are lower than those of ordinary DC coil models when operating for a long time.

Wide voltage withstand range

It can operate stably within a voltage range of 0.85 to 1.85 times the rated voltage, making it suitable for environments with large power supply voltage fluctuations.

1 set of normally open auxiliary contacts

It can be used for operation status indication, interlocking, or connection to PLC input points.

High contact reliability

Official data indicates a failure rate of less than 1 per 100 million operations (under 17V/1mA test conditions), making it suitable for signal circuits.

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	0.85–1.85 × rated voltage
Coil power consumption (closed/held)	1.6W / 1.6W
auxiliary contacts	1 normally open (1NO) group
Terminal type	Screw terminals, compatible with 0.5–4mm² wires.
net weight	Approximately 0.295 kg
Main circuit insulation voltage	690V
Protection level	IP20 (Front)
Installation method	35mm DIN rail or screw fixing
Major Certifications	UL, CSA, CCC, CE

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3RT2017-1VB41

Like the 1VB42, it belongs to the electronic wide-range coil family. The difference is that the auxiliary contacts are changed to one set of normally open (NO). It is an AC-3 12A/5.5kW/400V, 24V DC coil that can withstand voltage fluctuations of 0.85-1.85 times, suitable for general starting circuits.

3RT2017-1KB42

The AC-3 rated 12A/5.5kW/400V, 24V DC coil closing and holding power consumption is 2.8W, operating range is 0.7-1.25 times the rated voltage, net weight is approximately 281.8g, and it complies with IEC 60947-4-1 mirror contact safety specifications.

3RT2017-1KB41

Like the 1KB42, it belongs to the 24V DC, 2.8W coil family. The difference is that the auxiliary contacts are changed to one set of normally open contacts. It is AC-3 12A/5.5kW/400V, weighs approximately 296g, has an insulation voltage of 690V, and is suitable for general starting control circuits.