3RT2024-1NB30

Siemens 3RT2024-1NB30 General Purpose Coil Contactor 21-28V AC/DC 12A
Siemens 3RT2024-1NB30 General Purpose Coil Contactor 21-28V AC/DC 12A

The S0 body 3-pole contactor's coil supports both 21-28V AC and DC power supply, eliminating the need to distinguish between AC/DC in field wiring. It is equipped with 1NO+1NC auxiliary contacts to provide feedback on the operating status.

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Siemens 3RT2024-1NB30 General Purpose Coil Contactor 21-28V AC/DC 12A
Product Positioning

The 3RT2024-1NB30 is a rare S0 contactor in the SIRIUS 3RT2 series to adopt a "universal coil" design. The coil is rated at 21-28V and is compatible with both AC and DC control power supplies, eliminating the need to select a separate model based on power supply type. This significantly simplifies material preparation and selection for situations where the control power supply is not yet finalized or where both AC and DC control circuits exist on the same production line. The main circuit maintains a standard output of 5.5kW at AC-3 12A and 400V, and includes 1 NO + 1 NC auxiliary contacts for PLC to read the actual operating status of the contactor.

Core Product Advantages and Features
AC/DC universal coil, no selection required
The coil is rated at 21-28V and can be directly driven by both AC and DC control power supplies. There is no need to purchase a separate model according to the type of power supply, making material preparation and maintenance inventory simpler.
1NO+1NC feedback contact
It has a built-in set of normally open and a set of normally closed auxiliary contacts, which can report the status of the main contact in real time, facilitating PLC monitoring and interlocking control.
S0 high-density design
Measuring 45mm wide × 85mm high × 107mm deep, it shares installation space and accessories with other S0 models in the same series, and the panel configuration does not need to be changed.
Long life screw terminal structure
Both the main circuit and the control circuit use screw terminals, with a mechanical life of 10 million cycles and high long-term operational stability.
project Specification
Rated operating current AC-3 12 A (400 V)
Rated power AC-3 5.5 kW / 400 V
Control power supply voltage 21-28 V AC/DC universal coil, 50/60 Hz
Auxiliary contacts 1 NO + 1 NC (Instantaneous)
Extreme number 3 poles
Body size S0 (45×85×107 mm)
Terminal type The main circuit, auxiliary circuit, and coil all use screw terminals.
Protection level IP20 (Front-facing fingertip protection)
Mechanical life Approximately 10 million operation cycles
Electrical life Approximately 200,000 times (AC-4, 5.5A)
Rated insulation voltage 690 V, pollution level 3
Applicable Standards IEC/EN 60947-4-1
International Certification UL, EAC, KC and other certifications and ship/railway environmental verification

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