3RT2025-2BB44

S00 chassis 3-pole AC contactor, AC-3 17A/7.5kW, 24V DC coil with spring terminals and 2NO+2NC auxiliary contacts, suitable for panel wiring requiring multiple interlocking signals.

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Product Positioning

The 3RT2025-2BB44 is the smallest standard AC contactor (S00 frame) in the SIRIUS 3RT2 series. Its main circuit can handle 17A under AC-3 conditions, equivalent to a 7.5kW motor load at 400V, and up to 11kW/13A at 690V. This model uses a 24V DC operating coil and has four auxiliary contacts (2NO + 2NC), double the number of auxiliary contacts in the basic model of the same series. It is particularly suitable for control circuits that require simultaneous feedback of both "started" and "stopped" states, or those requiring multiple safety interlocks. Both the main and auxiliary circuits use spring-loaded (screwless) terminals. During field wiring, simply pressing down the spring clips secures the wires, reducing the time spent on repetitive wiring and minimizing the risk of poor contact due to loose screws after long-term use. It complies with international standards such as IEC and UL/CSA, and is suitable as the main contactor for small to medium-sized three-phase motors such as conveyors, pumps, and windmills, or for use in conjunction with reversible contactor groups.

Core Product Advantages and Features
Double auxiliary contact configuration
Built-in four auxiliary contacts (2NO+2NC), twice as many as the standard 1NO+1NC model in the same series, can simultaneously provide status feedback and independent interlocking circuits, reducing the cost and wiring of external auxiliary contact modules.
Spring-loaded screwless terminals
Both the main and auxiliary circuits use spring clip terminals, which can be pressed in to secure the circuit, eliminating the need for screw fastening and periodic torque re-tightening. This makes them suitable for production lines with large wiring volumes or those requiring rapid replacement.
24V DC coil drive
The coil has a rated voltage of 24V DC, which is consistent with the output voltage of common PLCs/relays. It can be directly driven by the control power supply without the need for an additional AC/DC conversion module.
S00 small chassis design
It is the smallest size in the SIRIUS 3RT2 series, with a compact structure and a weight of approximately 0.68kg, making it easy to install in control boxes or machine-side operating boxes with limited space.
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 17 A (400V) / 13 A (690V)
AC-3 rated power 7.5 kW (400V)/11 kW (690V)
Maximum rated operating voltage 690 V AC
control coil 24 V DC
auxiliary contacts 2NO + 2NC (4 sets of instantaneous contacts)
Terminal type Spring-loaded (screwless) terminals are the same for both main and auxiliary circuits.
Cross-sectional area of main circuit wires 1–10 mm² (single core/stranded wire)
Rated insulation voltage 690 V
Mechanical life 10 million operation cycles
Protection level IP20
weight Approximately 0.68 kg
Approval and certification Compliant with IEC standards and possesses international certifications such as UL/CSA.