3RT2025-1NB30

S00 chassis 3-pole AC contactor, electronic coil supports 21-28V AC/DC power supply, no polarity limitation, 1NO+1NC auxiliary contacts with screw terminals.

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Siemens 3RT2025-1NB30 Electronic 21-28V AC/DC Wide Voltage Coil Screw Terminal Contactor

Product Positioning

The 3RT2025-1NB30 is an S00 frame contactor in the SIRIUS 3RT2 series, featuring an electronic coil. The control coil has a rated voltage range of 21–28V and is compatible with both AC and DC power supplies without requiring polarity differentiation. This eliminates the hassle of changing contactor part numbers due to varying power sources, especially for automation panels where the power supply is not yet fixed or the design phase has not yet determined whether AC or 24V DC power is required. The main circuit continues the AC-3 capability of the 3RT2025 family, handling 13A at 690V, corresponding to an 11kW load. The auxiliary contacts are a basic 1NO+1NC combination, and the terminals are screw-fixed for easy verification of the locking status with a torque screwdriver. It has a 6kV surge withstand capability and IP20 protection rating, can operate stably in the range of -25°C to 60°C, and complies with international standards such as IEC 60947-4-1 and IEC 61508. It is suitable for OEM machine designs with high requirements for coil power supply flexibility.

Core Product Advantages and Features

Electronic coil AC/DC universal

It can accept both AC and DC power supplies within the 21-28V range, and there are no polarity restrictions, simplifying the selection of control power supplies.

High design flexibility

The same part number can be adapted to different control power supply types on site, reducing the variety of parts to be prepared and the risk of changing parts.

6kV surge withstand

The coil features a built-in surge suppression design, capable of withstanding instantaneous overvoltage surges of up to 6kV, thus improving reliability in noisy environments.

Screw-type terminals are easy to inspect

Both the main circuit and the auxiliary circuit use screw terminals, which facilitates periodic checks of the locking status using a torque tool.

project	Specification
Series Specifications	SIRIUS 3RT2025, S00 chassis (smallest size)
Number of poles/main contacts	3 poles, 3 sets of normally open (NO) main contacts
AC-3 rated current	13 A (690V)
AC-3 rated power	11 kW (690V)
control coil	Electronic type, 21-28V, AC/DC universal, no polarity limitation
auxiliary contacts	1NO + 1NC
Terminal type	Screw-type terminals, both main and auxiliary circuits are the same.
External dimensions (height × width × depth)	85×45×107 mm
Mechanical life	10 million operation cycles
Operating temperature range	-25°C to +60°C
Withstands impulse voltage	Can withstand up to 6kV surge
Protection level	IP20
Applicable Standards	IEC 60947-4-1, IEC 61508, CE, UL

3RT2025-1NB30

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