3RT10161MB410KT0

The 3RT1016-1MB41-0KT0 and 1MB42-0KT0 belong to the same coupling contactor series. They are 24V DC coils with a range of 0.85 to 1.85 times the rated voltage and can be directly driven by a PLC. The difference is that the 3RT1016-1MB41-0KT0 has one set of normally open (1NO) auxiliary contacts, and the main circuit is AC-3 rated at 9A and 4kW at 400V, with screw terminals.

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Siemens 3RT1016-1MB41-0KT0 24V DC Coupling Contactor 1NO

Product Positioning

The 3RT1016-1MB41-0KT0 is a member of the Siemens SIRIUS coupling contactor series. It shares the same 24V DC wide-range coil design (0.85~1.85 times rated voltage) as the 1MB42-0KT0, allowing direct connection to PLC digital output drives without the need for a relay circuit. The difference lies in the auxiliary contacts, which use a single normally open (1NO) design, suitable for operation indication or start-up interlock signal source. The main circuit maintains the 9A, 4kW S00 standard specification.

Core Product Advantages and Features

PLC direct drive coupling design

The coil operates within a range of 0.85 to 1.85 times the rated voltage and can be directly driven by PLC output.

9A/4kW main circuit

The AC-3 has a rated current of 9A and can switch 4kW three-phase motor loads at 400V.

24V DC coil

The DC coil design facilitates integration with PLCs or DC control systems.

1 set of normally open auxiliary contacts

Built-in 1NO auxiliary contact, suitable for operation indication or interlock start signal output.

Screw terminal design

Both the main and auxiliary circuits use screw terminals, making wiring and maintenance quite intuitive.

S00 Small Frame

It is compact and can be mounted on a 35mm standard DIN rail, saving space in the distribution box.

project	Specification
AC-3 rated current (400V)	9 A
AC-3 Rated Power (400V)	4 kW
coil voltage	24 V DC, Coupled Wide Range Coil
Coil operating range	0.85 to 1.85 times the rated voltage (without built-in overvoltage suppression circuit)
Auxiliary contact	1 normally open (1NO) group
Extreme number	3 poles
Terminal type	Screw terminals
Frame size	S00
Product Type	Coupling contactor, suitable for direct drive of PLC output.

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3RT10161BB443MA0

The 3RT1016-1BB44-3MA0 is the SIRIUS S00 contactor model with the most auxiliary contacts. It has four sets of permanently engaged contacts (2NO + 2NC) to meet interlocking, indicating, and feedback requirements. The main circuit is rated at 9A AC-3, 4kW at 400V, with a coil of 24V DC and a net weight of approximately 0.2kg, making it suitable for star-delta starting applications.

3RT1016-1BB42

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