3RT20161FB443MA0

The 3RT2016-1FB44-3MA0 is a Siemens SIRIUS S00 frame contactor. The main contacts are rated AC-3, 9A, 4kW/400V. The 24V DC coil has a built-in freewheeling diode to suppress power failure surges. It has screw terminals with two sets of normally open and two sets of normally closed auxiliary contacts that are factory-fixed. The housing dimensions are 58×45×117mm.

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Siemens 3RT2016-1FB44-3MA0 DC contactor, 9A, 4kW, 24VDC, 2NO2NC, built-in diode.

Product Positioning

The 3RT2016-1FB44-3MA0 is the DC diode protection version of the SIRIUS 3RT2016 series coil, designated 'F'. Compared to the standard DC coil (designation B), the F-type coil integrates a freewheeling diode, which can absorb self-induced surge voltage at the moment of coil de-energization, protecting the PLC output contacts or solid-state drive components connected in parallel. It is a common choice for many applications requiring DC control and where the lifespan of electronic circuits is important. The main contacts maintain the 3RT2016 series AC-3 9A, 4kW/400V specifications, and are pre-configured with 2 sets of normally open and 2 sets of normally closed auxiliary contacts (4 in total). Due to the larger auxiliary contact module, the housing depth has increased from the standard 58×45×73mm to 58×45×117mm.

Core Product Advantages and Features

24V DC built-in freewheeling diode

The coil, designated F, integrates a freewheeling diode, which can absorb the induced surge during the moment the coil is de-energized, reducing the impact on the PLC output module or semiconductor components.

2NO+2NC factory-fixed auxiliary contacts

Four auxiliary contacts (2 normally open + 2 normally closed) are pre-installed at the factory, making them suitable for circuit designs that require both operational feedback and interlock protection signals.

Screw terminal wiring

Both the main circuit and the control circuit use screw terminals, and construction personnel can use general wiring tools and work habits.

S00 frame, enlarged auxiliary contact area

Because it is equipped with 4 auxiliary contacts and has a housing depth of 117mm, it is still compatible with the standard S00 width and height dimensions, which is convenient for existing installation planning in the distribution panel.

project	Specification
model	3RT2016-1FB44-3MA0
Rated current (AC-3)	9 A
Rated power (400V, AC-3)	4 kW
Number of poles/main contacts	3 poles, 3 sets of normally open (NO) terminals
coil voltage	24V DC (built-in freewheeling diode)
auxiliary contacts	2 sets of normally open + 2 sets of normally closed (2NO + 2NC), factory fixed.
Terminal type	Screw terminals
Shell dimensions (height × width × depth)	58×45×117 mm
Casing Specifications	S00 framework
Insulation voltage	690 V
Protection level	IP20 (Front)
Mechanical life	Approximately 10 million cycles including auxiliary contact assembly
Ambient temperature	-25°C ~ +60°C

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