3RT2015-2BF42

The SIRIUS S00 series contactor has an operating coil of DC 110V and a spring terminal with a 1NC normally closed auxiliary contact, making it suitable for power distribution or interlocking circuits that use 110V DC as the control power supply.

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Siemens 3RT2015-2BF42 DC 110V coil contactor, 7A, 3kW, normally closed contact.

Product Positioning

The 3RT2015-2BF42 is a SIRIUS 3RT2 series S00 frame miniature contactor. Its main circuit has an AC-3 rated current of 7A and can switch approximately 3kW three-phase motors under a 400V mains power supply. The coil specification is DC 110V, a voltage still used as standard DC control power in some industrial distribution panels and switchgear control circuits. This product can directly handle such applications without additional voltage conversion. The 9th digit of the order number is 2, indicating the use of spring clip terminals, allowing for crimp-type wiring in both the main circuit and control circuit. Following Siemens SIRIUS auxiliary contact coding convention, the last two digits being 42 indicates the presence of one normally closed (NC) auxiliary contact, suitable for fail-safe logic designs such as fault reporting, power failure warning, or interlock protection. The overall dimensions are consistent with other S00 spring terminal models in the same batch, facilitating standardized installation spacing.

Core Product Advantages and Features

DC 110V control power supply compatibility

The coil specifications correspond to a 110V DC control power supply, making it suitable for direct use of existing 110V DC circuits in some distribution panels or switchgear.

Built-in 1 set of normally closed auxiliary contacts

As indicated by the last digit of the order code 42, the main body integrates 1 NC auxiliary contact, which is suitable as a power failure warning or interlock protection failure signal source.

Spring clip terminal

The 9th digit of the order number is 2, which allows for screwless wiring of the main circuit and auxiliary contacts, resulting in high construction efficiency.

S00 Miniaturized Appearance

Its size is consistent with other S00 models in the same batch, which facilitates the unified planning of installation hole positions and spare parts management in the power distribution box.

project	Specification
Series/Size Class	SIRIUS 3RT2, S00 frame
Extreme number	3-pole (3 NO main contacts)
Rated current (AC-3,400V)	7 A
Rated power (AC-3,400V)	3 kW
AC-1 rated current (400V)	18 A
Coil Specifications	DC 110V
Built-in auxiliary contacts	1 NC instantaneous contact
Terminal type	Spring clip terminal (order code 9 is 2)
External dimensions (height x width x depth)	70 x 45 x 73 mm
Mechanical life	Nominal 30 million cycles
Protection level	IP20 (Common value for the S00 platform)

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