Siemens 3RT2027-2NB30 SIRIUS 3RT20 Power Contactor, 32A, 15kW, 21-28V AC/DC, Spring-Loaded Terminal, Size S0 Original Brand New

Overview

The Siemens SIRIUS 3RT2027-2NB30 Power Contactor is a high-performance, 3-pole switching device designed for the reliable control of motors and other electrical loads. Part of the compact SIRIUS modular system, this size S0 contactor offers an optimal balance of performance and space-saving design. It features an AC-3e/AC-3 rated current of 32 A and an operational power of 15 kW at 400 V. The integrated coil circuit includes a varistor for surge suppression, ensuring coil protection and reliable operation. Connection is made quick, secure, and vibration-resistant via spring-loaded terminals.

Key Specifications

• Product Number: 3RT2027-2NB30
• Contactor Series: SIRIUS 3RT20
• Poles: 3-pole
• Rated Operational Current (AC-3e/AC-3, 400 V): 32 A
• Rated Operational Power (AC-3, 400 V): 15 kW
• Coil Control Voltage: 21-28 V AC/DC (50/60 Hz)
• Auxiliary Contacts: 1 Normally Open (1 NO) + 1 Normally Closed (1 NC)
• Connection Technology: Spring-loaded terminal (for quick, maintenance-free wiring)
• Size: S0
• Special Feature: Integrated varistor for coil protection

Benefit

• Space-Saving Design: Compact Size S0 footprint allows for efficient use of panel space.
• Reliable Performance: High contact reliability and long mechanical/electrical service life, part of the proven SIRIUS modular system.
• Fast & Secure Wiring: Spring-loaded terminals (Spring Clamp Technology) offer a quick, maintenance-free, and vibration-proof connection, reducing installation time and increasing operational stability.
• Coil Protection: Integrated varistor suppresses switching surges, protecting the coil and the control circuit components.
• Global Standard Compliance: IEC and UL/CSA approved, making it suitable for international applications.
• IE3/IE4 Ready: Optimized for use with high-efficiency motors.

Function

The 3RT2027-2NB30 functions as an electromechanical switch used primarily for switching electric motors (Direct-On-Line starting) in industrial control applications. The 3 main poles carry the load current (up to 32 A), while the integrated 1 NO and 1 NC auxiliary contacts provide feedback or enable interlocking in the control circuit. The wide-range 21-28 V AC/DC coil voltage makes it highly flexible for use in various control systems

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