3RT1955-5NB31
The Siemens SIRIUS S6 frame large contactor operating coil, rated voltage 21~27.3V AC/DC universal, screw terminal wiring, is a commonly used replacement coil specification when the 3RT105 and 3RT145 series contactors are paired with a 24V control power supply.
Product Positioning
The 3RT1955-5NB31 is the operating mechanism coil provided by Siemens for the S6 frame large contactor (3RT105, 3RT145 series). The rated voltage falls within the AC/DC universal range of 21~27.3V, which corresponds to the common 24V control power supply system in the field. It adopts the screw terminal connection method and is a common option when replacing old coils in production line equipment.
Core Product Advantages and Features
24V control power supply applicable
Rated voltage 21~27.3V UC, perfectly compatible with common 24V control power supply systems in the field.
AC/DC universal
The same coil can be used with either AC or DC 24V control power supplies, offering high flexibility in specifications.
Screw terminal wiring
Traditional screw terminal design, easy for construction personnel to operate and convenient for maintenance.
Applicable to large contactors
Replacement of operating mechanism for S6 frame series contactors such as 3RT105 and 3RT145
Genuine product guaranteed
Kenxin Motors is an authorized agent of Siemens, with traceable supply sources and stable quality.
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3RT1955-5NP31
The Siemens SIRIUS S6 frame large contactor features an electronically removable operating coil, compatible with AC/DC 200~277V, and supports direct drive from 24VDC PLC signals. It is suitable as a replacement part for 3RT105 and 3RT145 series contactors.
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3RT1955-5AR31
The 3RT1955-5AR31 is a removable coil operating mechanism for the S6 frame 3RT105/3RT145 contactor. It is rated for 440-480V AC/DC universal, with a holding power of 5.8VA, screw terminals, and a standard power-saving circuit design.
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3RT1955-5AP32
The 3RT1955-5AP32 belongs to the S6 frame 3RT105/3RT145 contactor with a removable coil operating mechanism. Verification data shows it operates on approximately 220V AC/DC, similar to but not identical to the 5AP31 (220-240V).