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.

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Siemens 3RT2016-1KB42 Screw-wiring Contactor, 24V DC Coil, Suitable for PLC Output

Product Positioning

The 3RT2016-1KB42 is a Siemens SIRIUS coupled contactor designed for applications requiring direct PLC or small relay output to drive the contactor coil. The coil is rated at 24V DC, with an operating voltage range of 0.7 to 1.25 times the rated value (0.7-1.25 × Uc). This range is slightly narrower than the VB42 in the same series but closer to the standard PLC output voltage characteristics. An integrated suppression diode protects the output contacts from surge damage. This product comes with one normally closed (NC) auxiliary contact. The main circuit is a 3-pole AC-3 rated 9A, 4kW/400V, with an S00 frame. The product weighs approximately 0.294 kg and measures approximately 50 × 61.5 × 77.5 mm. Because the contacts are modularly integrated with the coil, this model does not support the addition of a separate auxiliary contact module, making it suitable for control enclosures with limited space but requiring interlocking signals.

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 contactor coil can be directly driven by the PLC point.

Built-in suppression diode

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

1 set of normally closed auxiliary contacts

It comes standard with 1 NC auxiliary contact, suitable for use as a power failure protection, fault interlock or status feedback signal.

Compact size, screw terminals

Measuring approximately 50×61.5×77.5mm and weighing 0.294kg, it features screw-type terminals and is suitable for control boxes with limited space but requiring secure wiring.

project	Specification
model	3RT2016-1KB42
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 normally closed (NC) module cannot be added.
Terminal block type	screw type
External dimensions	Approximately 50×61.5×77.5mm
net weight	Approximately 0.294 kg
country of origin	Germany

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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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