Siemens 3RT2035-1NB30-1AA0 Power Contactor 41A, 18.5kW, 3-Pole, 20-33V AC/DC, with Varistor & Aux Contacts Original Brand New

Overview

The Siemens 3RT2035-1NB30-1AA0 is a high-performance 3-pole power contactor designed for demanding industrial applications. Built to handle up to 41A and 18.5kW at 400V, it is suitable for AC-3e/AC-3 motor switching operations. Its integrated varistor ensures efficient voltage suppression, while the auxiliary contacts (1 NO + 1 NC) allow for flexible control circuit design.

Key Benefit

• High Switching Capacity – Supports up to 41 A at 400V, ideal for motor control.

• Integrated Protection – Built-in varistor provides surge voltage protection.

• Dual-Voltage Coil – Operates on 20–33 V AC/DC, making it versatile for control systems.

• Reliable Auxiliary Contacts – Includes 1 Normally Open and 1 Normally Closed contact for extended control functionality.

• Compact Size S2 – Space-saving design with upright mounting for streamlined installations.

• Durable Construction – Screw terminal ensures secure and reliable connections.

Technical Specification

• Model: 3RT2035-1NB30-1AA0

• Rated Operating Current (AC-3): 41 A

• Motor Rating: 18.5 kW @ 400 V

• Poles: 3

• Control Voltage: 20–33 V AC/DC (50/60 Hz)

• Auxiliary Contacts: 1 NO + 1 NC

• Mounting: Upright

• Connection Type: Screw terminal

• Size: S2

• Integrated Protection: Yes, varistor included

Function

• Motor Switching: Provides the core function of electrically switching 3-phase AC motors on and off (AC-3 and AC-3e categories).
• Load Control: Suitable for switching non-motor loads such as lighting, heating, and resistive circuits (AC-1).
• Signaling & Interlocking: The integrated 1 NO + 1 NC auxiliary contacts allow for feedback signaling (e.g., contactor status) and control circuit interlocking.
• Coil Protection: The integrated varistor suppresses inductive voltage peaks (spikes) when the coil is de-energized, protecting the control circuit and PLC/controller output.

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