3RT2017-1BB42

Siemens 3RT2017-1BB42 DC Electromagnetic Contactor 24V DC 1NC
Siemens 3RT2017-1BB42 DC Electromagnetic Contactor 24V DC 1NC

24V DC coil electromagnetic contactor, S00 small housing, featuring one set of normally closed (NC) auxiliary contacts, which can be used for power failure alarms or interlocking circuits, AC-3 rated 12A/5.5kW.

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Siemens 3RT2017-1BB42 DC Electromagnetic Contactor 24V DC 1NC
Product Positioning

The 3RT2017-1BB42 shares almost the same main circuit specifications as its sibling, the 1BB41. The biggest difference is that the auxiliary contacts are changed from normally open to one set of normally closed contacts. This can be used to trigger alarms, monitoring, or safety interlock circuits when the contactor is de-energized, making it a common choice for designs requiring "power-off action". The coil is also 24V DC, and the 3-pole normally open main contacts are rated at 12A and 5.5kW at 400V AC-3. Wiring uses screw terminals, making it a direct replacement for older models such as the 3RT1017-1BB42.

Core Product Advantages and Features
1 set of normally closed auxiliary contacts
Standard configuration includes 1NC auxiliary contacts that close only when the contactor is de-energized (released), making it suitable for power failure alarms or safety interlocks.
24V DC coil drive
The coil is rated at 24V DC and can be directly driven by a PLC output or a 24V control power supply, sharing a power supply with other 24V products in the same series.
AC-3 12A/5.5kW main contact
The 3-pole normally open main contact corresponds to a rated AC-3 motor of 5.5kW at 400V, and can be directly switched to a general small three-phase motor.
Replaces older models
Its shape and electrical specifications make it a functional replacement for older series contactors such as the 3RT1017-1BB42, facilitating equipment maintenance and upgrades.
project Specification
Series/Framework SIRIUS 3RT2, S00 small case
Extreme number 3-pole (3NO main contact)
AC-3 rated current 12 A
AC-1 rated current 22 A
AC-3 Rated Power (400V) 5.5 kW
Coil Specifications 24V DC
Auxiliary contact Group 1 normally closed (1NC), 10A
Wiring method Screw terminals
Insulation voltage 690 V
net weight Approximately 0.292 kg
Operating ambient temperature -25°C ~ +60°C
Installation method DIN rail mounting or panel locking

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