Siemens Industrial Controls 3RT2027-1AN20 Contactor

As a core component of the SIRIUS 3RT2 system, the Siemens 3RT2027-1AN20 is a heavy-duty 3-pole power contactor designed for demanding industrial motor control applications. This Size S0 contactor delivers a robust 32A (AC-3) rating and is optimized for HVACR and automation environments, supporting up to 15 kW at 400V. Field-ready for 220V AC 50/60Hz control logic, this unit features integrated auxiliary contacts (1NO + 1NC) for immediate status feedback and interlocking without the need for additional modules. Built for long-term reliability in high-cycle operations, it boasts a mechanical service life of 10 million cycles and finger-safe screw terminals that meet stringent DIN VDE standards. Whether you are performing a field replacement for the legacy 3RT1033 series or integrating a magnetic motor starter into a new panel, the 3RT2027-1AN20 provides the high-performance switching and IP20 protection required by modern contractors and shop floors.

• Optimized Load Handling: Rated for 32A AC-3 and 50A AC-1, making it a versatile choice for pumps, compressors, and conveyors.
• Reduced Footprint: The S0 frame size (45mm width) ensures high current density while saving critical DIN rail space.
• Dual-Frequency Control: The 220V AC coil operates at both 50Hz and 60Hz, minimizing inventory requirements for global equipment.
• Built-In Logic: Pre-configured with 1NO and 1NC contacts to simplify control wiring and provide immediate system status.
• Easy Installation: Designed for standard 35mm DIN rail mounting or surface screw mounting for rapid field deployment.

Is the 3RT2027-1AN20 a direct replacement for 3RT1027-1AN20?
Yes, the 3RT2 series is the modern successor to the 3RT1 series. While it fits the same footprint, any previously mounted accessories like overloads or auxiliary blocks should be checked for 3RT2 compatibility.

What are the horsepower ratings for this contactor?
For 3-phase applications, this unit is rated for approximately 10 HP at 230V and 20 HP at 460V, providing sufficient overhead for most mid-sized industrial motors.

Can I add more auxiliary contacts to this unit?
Absolutely. Although it comes with 1NO/1NC integrated, the S0 frame accepts front-mounted or side-mounted auxiliary switch blocks to expand your control logic.

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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.