Siemens 3RT2045-1NP34 Power Contactor, 80A, 37kW, AC-3e/AC-3, S3 Size Original Brand New

Overview

The Siemens SIRIUS 3RT2045-1NP34 is a robust and highly efficient power contactor designed for reliable switching of motors and electrical loads. Part of the SIRIUS 3RT2 series, this S3 size contactor offers a powerful solution for industrial automation and control applications. With an impressive 80 A current rating and a 37 kW power rating at 400 V, it is engineered for demanding AC-3e/AC-3 duty.

Its versatile AC/DC control voltage (175-280 V) with an integrated varistor ensures dependable performance and surge protection, while the included 2 NO + 2 NC auxiliary contacts provide flexible signaling and control options. The user-friendly screw terminals and removable auxiliary switch make installation and maintenance straightforward.

Key Features & Benefit

• High Performance: Handles high-power applications with an 80 A (AC-3e/AC-3) rating and 37 kW at 400 V.
• Versatile Control: Operates on a wide control voltage range of 175-280 V AC/DC, making it suitable for various control systems.
• Integrated Protection: Built-in varistor protects the coil against voltage surges, extending the product’s lifespan and ensuring system stability.
• Flexible Functionality: Comes equipped with 2 Normally Open (NO) and 2 Normally Closed (NC) auxiliary contacts for additional control and feedback circuits.
• Easy Installation: Features secure screw terminals for quick and reliable wiring connections.
• Convenient Maintenance: The removable auxiliary switch allows for simple and fast replacements or modifications.
• Compact & Robust Design: The S3 size offers a compact footprint for its power class, ideal for space-constrained panels.

Function

The Siemens 3RT2045-1NP34 power contactor is primarily used for:

• Switching and controlling 3-phase AC motors.
• Controlling resistive loads in various industrial applications.
• Serving as a key component in motor starter combinations.
• Acting as an intermediary switch in complex control circuits.

Technical Specification

• Product Number: 3RT2045-1NP34
• Type: Power Contactor
• Series: SIRIUS 3RT2
• Current Rating (AC-3e/AC-3): 80 A
• Power Rating: 37 kW @ 400 V
• Number of Poles: 3
• Control Voltage: 175-280 V AC/DC (50/60 Hz)
• Auxiliary Contacts: 2 NO + 2 NC
• Terminal Type: Screw Terminal
• Size: S3
• Special Features: Integrated varistor, removable auxiliary switch

Application

• Industrial automation
• Machine control panels
• Motor control centers (MCCs)
• HVAC systems
• Pumping and fan applications
• Conveyor systems

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