3RT2017-2VB42

The Siemens SIRIUS 3RT2017-2VB42 is an S00 frame electromagnetic contactor, AC-3 rated at 12A, 5.5kW/400V, with a 24V DC coil capable of withstanding 0.85 to 1.85 times the rated voltage. It has a built-in set of normally closed auxiliary contacts and diode protection, but does not support the addition of external auxiliary contact modules.

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Siemens 3RT2017-2VB42 Electromagnetic Contactor AC-3 12A 5.5kW 24V DC

Product Positioning

The 3RT2017-2VB42 is a complete order model in the S00 frame 3RT2017 series, and can be ordered directly without any additional suffix. Its AC-3 rating is the same as other models in the series: 12A, 5.5kW/400V, with a 24V DC coil. However, its operating voltage range is 0.85 to 1.85 times the rated value, wider than other DC coil models in the series (mostly 0.7 to 1.25 times). It can be considered a version specifically designed for applications with large voltage fluctuations. The coil circuit also has a built-in diode for surge protection. The main circuit and control circuit use spring terminals. However, due to the fixed structure of this model, the original documentation specifically states that external auxiliary contact modules cannot be added. It is recommended to confirm whether the actual circuit requires a sufficient number of auxiliary contacts before selecting this model.

Core Product Advantages and Features

24V DC coil, ultra-wide operating range of 0.85~1.85 times.

It has a wider operating voltage range than most DC coil models in the same series and a higher tolerance for power supply voltage fluctuations.

Built-in diode protection

The coil circuit integrates a diode to absorb the back electromotive force when the coil is released, thus extending the life of the switching element.

1 set of normally closed auxiliary contacts

Built-in 1NC auxiliary contacts for basic interlocking or status feedback.

Spring terminals, complete order model

No additional suffix is required for the complete order model. However, the structure is fixed and does not support the addition of external auxiliary contact modules. It is recommended to confirm the circuit requirements before selecting a model.

project	Specification
Model (MLFB)	3RT2017-2VB42
Casing size	S00
Extreme number	3 poles
AC-3 rated current	12 A
AC-3 rated power	5.5 kW / 400V
coil voltage	24V DC
Coil operating range	0.85~1.85 times the rated value
Coil protection	Built-in diode
Auxiliary contacts	Built-in 1 NC
Terminal type	Spring terminals
Expansion	External auxiliary contact modules are not supported.

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