Siemens Industrial Controls 3RT2028-1AK60 Contactor

The Siemens Sirius 3RT2028-1AK60 Contactor is a high-performance, IEC-rated size S0 power contactor engineered for heavy-duty motor switching and industrial automation. This 3-pole unit supports an AC-3 operating current of 38A and is capable of handling up to 18.5 kW (approx. 25 HP) at 460V, making it a critical component for reliable 3-phase power distribution. Designed within the SIRIUS modular system, this model streamlines panel builds with its integrated 1NO & 1NC auxiliary contacts and robust screw terminal connections. The 110V/120V AC 50/60Hz coil allows for seamless integration into standard control circuits. Built for durability, it features a long mechanical service life of up to 10 million switching cycles and is IE3/IE4 ready, ensuring efficiency with modern high-efficiency motors. This unit serves as a direct upgrade or replacement for legacy series like the 3RT1034-1AK60, maintaining a compact 45mm width for high-density DIN-rail mounting.

Key Benefits

• Enhanced Connectivity: Integrated 1 NO and 1 NC auxiliary contacts reduce the need for additional add-on blocks in standard control configurations.
• Climate Resistance: Rated for operation from -25 to +60 °C, ensuring reliability in demanding HVACR and industrial environments.
• Modular Flexibility: Fully compatible with SIRIUS 3RV2 motor starter protectors and 3RU2/3RB3 overload relays for comprehensive motor protection.
• Global Compliance: Meets CE, UL, CSA, and CCC standards, making it suitable for international deployments and diverse site specifications.
• Efficient Footprint: Size S0 design maximizes cabinet space without compromising amperage capacity or heat dissipation performance.

Common Questions

Is the 3RT2028-1AK60 compatible with 3RT1 series accessories?
While the 3RT2028-1AK60 is the electrical and dimensional successor to the 3RT1034 series, direct-mount accessories such as auxiliary switches or link modules typically require version-specific updates within the 3RT2 lineup for optimal fit and function.

What is the maximum horsepower rating for this contactor?
The 3RT2028-1AK60 is rated for approximately 10 HP at 230V and 25 HP at 460V in 3-phase applications, supporting a maximum AC-3 load of 38 Amps.

Can this contactor be used for DC loads?
This specific model is optimized for AC-3 motor switching; for DC-1 or DC-3/5 applications, please consult the Siemens technical manual for derating factors or specialized DC-rated variants.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.