Siemens 3RT2045-3NB30 Power Contactor, 80A, 37kW, 20-33V AC/DC Coil, Size S3, Spring-Loaded Terminals Original Brand New

Overview

The Siemens 3RT2045-3NB30 Power Contactor from the SIRIUS 3RT2 series is a high-performance 3-pole switching device designed for motor control applications up to 37 kW at 400 V. This robust 80 A contactor in a compact Size S3 frame is engineered for high contact reliability and long service life.

Its versatile control system features a low-voltage 20-33 V AC/DC coil with an integrated varistor for surge protection, making it ideal for universal control voltage applications. The main power circuit uses reliable screw terminals, while the control and auxiliary circuits utilize convenient, vibration-proof spring-loaded terminals for fast, error-free wiring.

Key Benefit

• Universal Control: Wide-range 20-33 V AC/DC control voltage offers flexibility and minimizes stock variants.
• Enhanced Protection: Integrated varistor provides effective surge suppression, protecting the control circuit.
• Fast, Secure Wiring: Spring-loaded terminals on the control and auxiliary circuits ensure fast installation and maintenance-free, vibration-proof connections.
• Space-Saving Design: The compact Size S3 frame provides high performance (80A, 37kW) in a minimal footprint.
• Complete Feedback: Includes 1 Normally Open (NO) and 1 Normally Closed (NC) integrated auxiliary contacts for status indication and interlocking.
• IEC and UL/CSA Approved: Suitable for global use in industrial motor feeders.

Application

The Siemens 3RT2045-3NB30 is the optimal choice for switching motors in industrial and commercial environments, including:

• Standard AC motor control (Direct-On-Line start)
• Pump and fan applications
• Conveyor systems and material handling
• Integration into complex load feeders and machinery

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