3RT2016-1KB41

The Siemens SIRIUS 3RT2016-1KB41 is a 24V DC coupled contactor with an operating range of 0.7 to 1.25 times the rated voltage. It has a built-in suppressed diode and is suitable for PLC output drive. It comes with one set of normally open auxiliary contacts and screw terminals. The AC-3 rated voltage is 9A/4kW/400V.

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Siemens 3RT2016-1KB41 Screw-wiring contactor, 24V DC coil, suitable for PLC output.

Product Positioning

The 3RT2016-1KB41 shares the same 24V DC coupled coil design as its sibling, the 1KB42, with an operating voltage range of 0.7 to 1.25 times the rated value. The coil has a built-in suppression diode, making it particularly suitable for directly driving contactors with PLC or small relay outputs. It is a common coupled contactor choice for automation control panels. The difference lies in the inclusion of one normally open (NO) auxiliary contact, which can be used for operating status indication or start-up interlocking circuit signal output. The main circuit specifications are 3-pole AC-3 rated 9A, 4kW/400V, S00 frame, net weight approximately 0.295 kg, and dimensions approximately 50×61.5×77.5 mm. The terminals use a screw-type design. Since the coil and auxiliary contacts are integrated into a single module, this model does not support additional auxiliary contacts. It is recommended to confirm the actual number of contacts required before purchasing.

Core Product Advantages and Features

Designed specifically for PLC output

The coil operating voltage range is 0.7 to 1.25 times the rated value, which is close to the output voltage characteristics of a standard PLC, and the coil can be directly driven by the PLC position.

Built-in suppression diode

The coil integrates a suppression diode to absorb the induced surge during power failure, extending the life of PLC or relay output contacts.

1 set of normally open auxiliary contacts

It comes standard with 1 NO auxiliary contact, which is suitable as a signal source for operation indication, start interlock or timing circuit.

Screw terminals, compact size

It measures approximately 50×61.5×77.5mm and weighs 0.295kg. It features traditional screw terminals for secure locking and easy long-term maintenance.

project	Specification
model	3RT2016-1KB41
series	Siemens SIRIUS 3RT2 series (coupled type)
Extreme number	3 poles
Frame size	S00
AC-3 Rated Current/Power	9A / 4kW (400V)
Control coil voltage	24V DC
Coil operating voltage range	0.7~1.25×Uc
Coil Additional Functions	Built-in suppression diode, suitable for PLC output
Auxiliary contact	One set is normally open (NO), and expansion modules cannot be installed.
Terminal block type	screw type
External dimensions	Approximately 50×61.5×77.5mm
net weight	Approximately 0.295 kg
country of origin	Germany

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3RT2016-1KB42

The Siemens SIRIUS 3RT2016-1KB42 is a 24V DC coupled contactor with an operating range of 0.7 to 1.25 times the rated voltage. It has a built-in suppressed diode and is suitable for PLC output. It comes with one set of normally closed auxiliary contacts, screw terminals, and AC-3 rated 9A/4kW/400V.

3RT2016-1JB42

The Siemens SIRIUS S00 coupled power contactor features a 24V DC coil with a suppressed diode, one set of normally closed auxiliary contacts, and an AC-3 9A/4kW rating. It is suitable as an isolation element between the PLC digital output and the main circuit.

3RT2016-1JB41

The SIRIUS S00 coupled power contactor features a 24V DC coil with diode protection, one set of fixed, non-expandable normally open auxiliary contacts, AC-3 9A/4kW, and weighs only about 0.297kg, making it suitable for PLC output switching applications.