Siemens 3RT2046-1NB30 SIRIUS Power Contactor, 95A, S3 Original Brand New

Overview

The Siemens 3RT2046-1NB30 is a high-performance, 3-pole SIRIUS power contactor (Size S3) designed for safe and reliable switching of motors and other high-current loads up to $45\text{ kW}/95\text{ A}$ at $400\text{ V}$. Part of the trusted SIRIUS 3RT2 family, this robust component is engineered for demanding industrial control applications. Its hybrid AC/DC coil (20-33 V AC/DC) provides flexible control, and the integrated varistor ensures enhanced surge suppression for coil protection.

Key Features & Specification

• Product Number: 3RT2046-1NB30
• Product Series: SIRIUS 3RT2
• Size: S3
• Poles: 3-pole
• Operating Current (AC-3e/AC-3): $95\text{ A}$
• Rated Power (400 V): $45\text{ kW}$
• Control Voltage (Coil): $20\text{–}33\text{ V AC/DC}$ (50/60 Hz) – Flexible AC/DC operation
• Surge Protection: Integrated varistor for reliable coil suppression
• Auxiliary Contacts: $1\text{ NO}+1\text{ NC}$ (built-in)
• Terminals: Screw terminals for secure wiring
• Application: Ideal for Direct On Line (DOL) starting and general motor switching applications.

Benefit

• High Reliability: SIRIUS quality ensures long-term operational dependability in demanding environments.
• Versatile Control: The wide-range $20\text{–}33\text{ V AC/DC}$ coil voltage simplifies procurement and stock-keeping.
• Space-Saving: Compact Size S3 design for high packing density in control cabinets.
• Enhanced Protection: Integrated varistor minimizes voltage spikes, protecting the control circuitry and extending the coil’s life.
• Easy Integration: Screw terminals allow for quick and secure installation and maintenance.
• Motor Control Ready: Built-in $1\text{ NO}+1\text{ NC}$ auxiliary contacts are standard for signaling and interlocking.

Function

The Siemens 3RT2046-1NB30 Power Contactor is primarily used to switch electric motors and resistive loads in industrial control systems. It is commonly implemented in:

• Direct On-Line (DOL) motor starters
• Reversing motor combinations (when combined with a second contactor)
• Control panels for pumps, fans, compressors, and general machinery
• Switching heating elements, lighting, and capacitor banks (subject to application requirements).

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